Data Recovery Wiki » Raid Data Recovery http://www.hddwiki.org Data Recovery Training,Data Recovery Tools,Data Recovery Tutorial Wed, 01 Sep 2010 07:35:07 +0000 en hourly 1 http://wordpress.org/?v=3.0 2010 SalvationDATA Data Recovery Training to Be Held in October 18-22 http://www.hddwiki.org/index.php/2010/08/30/2010-salvationdata-data-recovery-training-to-be-held-in-october-18-22/ http://www.hddwiki.org/index.php/2010/08/30/2010-salvationdata-data-recovery-training-to-be-held-in-october-18-22/#comments Tue, 31 Aug 2010 03:28:35 +0000 admin http://www.hddwiki.org/?p=856 In the third week of October (18th to 22nd) SalvationDATA will hold a 5 days’ data recovery training in Chengdu, China. Those who are new to data recovery business and those who expect to improve their data recovery success rate are able to take this opportunity and e-mail to us for immediate application. October training: October 18-22, [...]]]> In the third week of October (18th to 22nd) SalvationDATA will hold a 5 days’ data recovery training in Chengdu, China. Those who are new to data recovery business and those who expect to improve their data recovery success rate are able to take this opportunity and e-mail to us for immediate application.
October training: October 18-22, 2010
5 days
Location: Chengdu, Sichuan, China
Nearest Airport Name: CHENGDU SHUANGLIU INTERNATIONAL AIRPORT
On July 23rd, SalvationDATA completed a successful 5 days’ data recovery training in its headquarter, Chengdu, China, providing 5 trainees from 4 countries data recovery solutions in hardware level.

As ever, this session of data recovery training would provide trainees data recovery solutions ranging from basic hard disk drive structure, data recovery flows, operation skills of data recovery tools, data recovery tips, and also data recovery practice in the guidance of SalvatioDATA’s engineers.

Moreover, Data Compass 2011 and soon-upcoming USB write blocker—Source Data Safe Guard will be addressed to all trainees as well. Operations of those newly tools will be added into the content of this data recovery training.

Data Compass 2011 is the fourth generation of Data Compass, combining all features and advantages of former one, providing users easier of use, higher successful data recovery rate, more data recovery solutions , what’s more, more repeat customers and reputations.

Source Data Safe Guard, which will be officially released soon by SalvationDATA, is designed for preventing any data being changed or written by human errors or virus. It could protect data maximally for customers. And it would provide customers better data recovery solutions.

For detailed information about this data recovery training, please E-mail us via: info@salvationdata.com, or talk to us: 86-28-68107757

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]]> http://www.hddwiki.org/index.php/2010/08/30/2010-salvationdata-data-recovery-training-to-be-held-in-october-18-22/feed/ 0 Data Recovery Tool recommended http://www.hddwiki.org/index.php/2010/08/03/data-recovery-tool-recommended/ http://www.hddwiki.org/index.php/2010/08/03/data-recovery-tool-recommended/#comments Tue, 03 Aug 2010 07:50:34 +0000 admin http://www.hddwiki.org/?p=829 Data recovery is not that difficult as people may have thought, not only the data recovery engineers can do, but some common IT guys can do it as well. Find your data back with the right data recovery tools, it’s easy from here!

It can be hard time for many people and many companies, not only due [...]]]> Data recovery is not that difficult as people may have thought, not only the data recovery engineers can do, but some common IT guys can do it as well. Find your data back with the right data recovery tools, it’s easy from here!

It can be hard time for many people and many companies, not only due to the financial crisis causing unemployment, unstable foreign exchange rate, competitions and many visible and invisible threats. Facing such kind of difficult situation, we need to find something which we can make money fast with. Data recovery business becomes a new niche for many people and companies due to its increasing marketing share and demand. From individuals to companies, from companies to governments, from noncommercial to commercial bodies and organizations, data loss becomes a big threat and more and more people begin to realize the importance of data recovery and data security. They need not only the data to be recovered, but also need the data to be secured without disclosing to a third party data recovery service company.

In 2010, we have searched the data recovery market for almost two months to find out the best data recovery tools, we don’t want to say which is the best and we do find one which is very interesting and powerful. You must find it one amazing data recovery tool if you see and use it.

Thanks to our marketing research team, they find out one data recovery hardware-Data Compass. It’s very easy to use (1 hour to take to operate on it) due to its automate data recovery design. You don’t need to have brain storm and you don’t need to calculate or have complicated configuration, etc. Users just need to connect the patient hard drives to the data compass hardware console and you are able to find the lost data by Data Compass software interface-DCEXP.

Data Compass has USB portable design and can be carried with a beautiful suitcase. You can provide fast and door-to-door data recovery services to any customers you may have. The most important is that you are able to secure your data and cut any possibility of disclosure, especially for some governmental and military agencies with sensitive data.

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]]> http://www.hddwiki.org/index.php/2010/08/03/data-recovery-tool-recommended/feed/ 0 Data Compass 2011 with new data recovery hardware solutions http://www.hddwiki.org/index.php/2010/07/20/data-compass-2011-with-new-data-recovery-hardware-solutions/ http://www.hddwiki.org/index.php/2010/07/20/data-compass-2011-with-new-data-recovery-hardware-solutions/#comments Wed, 21 Jul 2010 02:23:29 +0000 admin http://www.hddwiki.org/?p=821 In order to meet a higher level of request from customers on Data Compass, one of our major data recovery equipment, SalvationDATA is going to release the Data Compass 2011 version.

Data Compass 2011 version combines all the advantages of the former versions of Data Compass and the most important is its new features added for improving [...]]]> In order to meet a higher level of request from customers on Data Compass, one of our major data recovery equipment, SalvationDATA is going to release the Data Compass 2011 version.

Data Compass 2011 version combines all the advantages of the former versions of Data Compass and the most important is its new features added for improving and maximizing data recovery success rate.

Image and recover faulty drives without limitation of brand and model!

Please check the major features of Data Compass 2011:

1, Image and recover faulty drives with unstable heads or a lot of bad sectors or even some platter scratches, visibly imaging and recovering your wanted data;

2, Image and recover files by selective heads and selective files for Seagate, Maxtor, WD, Hitachi, Fujitsu and Toshiba, etc;

3, 7GB/min sector by sector disk image hardware solution and 8GB/min data wiping hardware solution wiping data permanently with our Data Copy King add-on;

4, Recover data directly from undetected Hitachi/IBM hard drives due to firmware corruption;

5, Recover data directly from undetected Western Digital drives due to head damage;

6, Fully combined with our Data Compass and all our HD Doctors (Seagate, WD, Maxtor, Hitachi/IBM, Samsung, Toshiba/Fujitsu), that means you can use Data Compass and HD Doctor Suite collectively or separately;

7, Fully configurable image options enable you to treat all faulty drives differently, view the data during your image;

8, Easily recover lost data due to file system corruption, virus infection, hard drive formatting, accidental deletion, operating system malfunction and so forth;

9, RAID data recovery from Raid 0, Raid 1, Raid 5, Raid 5E and Raid 5EE.

Data Recovery Case Study For Sharing
Get our Data Compass 2011 software program for free

In order to improve the success rate of Data Recovery by SalvationDATA data recovery tools, we decided to invite our customers to join this ‘case study sharing and improving’ activity. We sincerely wish you can share us with your unique data recovery tips and tricks and then we all can improve and succeed in this field. The most important, you are able to get our Data Compass 2011 software solutions soon before they are officially published at a later date!

Download the form of ‘case study sharing and improving’, fill it and send to info@salvationdata.com and you will get the Data Compass 2011 software solutions soon.

Note: Please check the sample form to fill the form correctly if you are not very sure about what to fill.

Mail to us by info@salvationdata.com and learn more about Data Compass 2011 or call us directly by 00862868107757.

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]]> http://www.hddwiki.org/index.php/2010/07/20/data-compass-2011-with-new-data-recovery-hardware-solutions/feed/ 0 Perfect RAID Data Recovery Tools http://www.hddwiki.org/index.php/2009/11/27/perfect-raid-data-recovery-tools/ http://www.hddwiki.org/index.php/2009/11/27/perfect-raid-data-recovery-tools/#comments Fri, 27 Nov 2009 17:34:31 +0000 admin http://www.hddwiki.org/?p=622 Data division and replication, these are the two basic processes used in RAID. Though there are multiple disks, but all these are considered and treated as single disk by the operating system.

Based on different data storage schemes, various RAID levels have been standardized. From RAID 0 through RAID 6, there are different schemes which [...]]]> Data division and replication, these are the two basic processes used in RAID. Though there are multiple disks, but all these are considered and treated as single disk by the operating system.

Based on different data storage schemes, various RAID levels have been standardized. From RAID 0 through RAID 6, there are different schemes which offer appropriate solutions for data protection, performance and reliability. Different nested levels are also implemented like RAID 0+1, RAID 5+0, RAID 5+1 and so on.

When one or more RAID drives fail, it requires different RAID data recovery tools for different RAID arrays. Such RAID data recovery tools depend upon the nature of failure that is whether logical or physical drive failure.

RAID 0 includes multiple disks in which data striping is performed without redundancy but no fault tolerance. Striping is a technique that spreads blocks of each file across multiple disk drives. Fault tolerance is an engineering design technique that enables a system to continue operation, generally at a reduced performance level rather than failing completely, when a critical system component (like system software) or the whole system(a hardware or software RAID based RAID array here) fails. If any of the RAID drives fail, then all data in the RAID 0 array is lost. So, failure of even a single RAID 0 drive requires RAID data recovery tools.

RAID 1 uses two storage industry leading techniques to offer better storage reliability than RAID 0 along with Fault Tolerance. Disk Mirroring: A technique which applies simultaneous writing of data to two duplicate disks to ensure complete data safety. In this manner, if one hard drive fails, the system can quickly switch to the other hard drive without loosing any data or halting any service. Disk mirroring is generally used in database servers and on-line database systems like of banks to meet the data accessibility requirements round the clock. Thus, RAID 1 can remain operational as long as even a single RAID 1 hard drive is functional in the array. RAID 1 fails when the drive suffers physical failure. Commonly it happens due to reasons like wear and tear of the moving components and hard drive fatigue. But when two drives fails at the same time, then you need to use the RAID data recovery tools, too.

For RAID 1+0, failure of multiple hard drives can be taken care of (if logical in nature) until no two failed drives are mirrored to each other, if in this case,a RAID data recovery tools is also required.

The frequently used RAID 5 array can tolerate one hard drive failure and decrease the probability of RAID data recovery tools. This is because in this case distributed parity can help rebuilding the array. In any of the RAID arrays, what values the most is that the data remains intact and always accessible accessible.

The experts are known for their service to recover lost data from almost all modern RAID arrays by using RAID data recovery tools, Nowadays there are several RAID data recovery tools in the market have been usually chosen such as Data Compass Premium produced by SalvationDATA, PC3000 produced by ACE, this two RAID data recovery tools are highly recommend by the experts as they are hardware and software combined RAID data recovery tools,meanwhile,there are also simple software RAID data recovery tools in the market chosen by the individuals. These experts are well versed of RAID data storage systems, hard drive internals and rigorous recovery mechanisms.

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]]> http://www.hddwiki.org/index.php/2009/11/27/perfect-raid-data-recovery-tools/feed/ 0 Introduction to RAID 5 Array http://www.hddwiki.org/index.php/2009/09/02/introduction-to-raid-5-array/ http://www.hddwiki.org/index.php/2009/09/02/introduction-to-raid-5-array/#comments Wed, 02 Sep 2009 11:22:23 +0000 admin http://www.hddwiki.org/index.php/2009/09/02/introduction-to-raid-5-array/ Definition of a RAID 5 Array A RAID 5 array uses at least three disks and stripes information at the byte level across the member disks. Parity data is also written across each member disk to allow the RAID data to be recovered in the event of a disk failure. Different Ways a RAID 5 Array [...]]]> Definition of a RAID 5 Array A RAID 5 array uses at least three disks and stripes information at the byte level across the member disks. Parity data is also written across each member disk to allow the RAID data to be recovered in the event of a disk failure. Different Ways a RAID 5 Array Can Be Set Up A RAID 5 array can be set up as a software RAID using special software or as a hardware RAID using a RAID controller. A software RAID is generally either set up using standalone software or using RAID software which is built into an operating system such as Windows 2003 Server. A software RAID uses the CPU and memory of the computer on which it is installed. This can slow down other applications on that computer. This also makes the software RAID vulnerable to failure due to problems with the host computer. A hardware RAID uses a RAID controller which handles array duties thus there is no strain on the host computer’s CPU and memory. Applications Best Suited for RAID 5 Since RAID 5 offers better read performance than write performance, it is best suited for read-oriented applications such as web, intranet, and email servers. It could also be suited for databases as long as there is more reading than writing. With RAID 5, writes are slowed down because the array must write parity data to the disks. Advantages and Disadvantages of RAID 5 Arrays There are several advantages from a RAID 5 array. Since a RAID 5 writes parity data to each of the member disks, a RAID 5 can sustain the failure of one disk. The parity data allows the RAID to be recovered. Another advantage of RAID 5 is that it is fairly cost-effective considering the amount of fault tolerance it provides. Finally, RAID 5 offers a good rate of reads to the member disks. Some disadvantages of RAID 5 are that it offers slower writes as it must write parity data in addition to regular data. It can also be expensive to implement as it requires special hardware. Conclusion Overall, RAID 5 offers excellent fault tolerance without wasting drive space. It also offers a high read performance making it suitable for a wide variety of applications. More information about RAID 5 arrays can be found at RAID 5 Data Recovery. This article can be freely published on a website however it must not be modified in any way including the author bylines, and the hyperlink must be made active as shown below. Andrea Stone is employed with ReWave Hard Drive Recovery, a data recovery company serving clients in cities worldwide including Atlanta, Charlotte, Dallas, Durham, Greensboro, Houston, Jacksonville, Little Rock, Los Angeles, Memphis, Miami, Nashville, New Orleans, New York City, Orlando, Phoenix, Raleigh, Richmond, San Antonio, San Diego, Tampa, Virginia Beach, and Winston-Salem. Visit the ReWave Hard Drive Recovery website for more information about RAID recovery and data recovery. Article Source: http://EzineArticles.com/?expert=Andrea_Stone

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]]> http://www.hddwiki.org/index.php/2009/09/02/introduction-to-raid-5-array/feed/ 0 RAID – Just a Bunch of Disks http://www.hddwiki.org/index.php/2009/08/11/raid-just-a-bunch-of-disks/ http://www.hddwiki.org/index.php/2009/08/11/raid-just-a-bunch-of-disks/#comments Tue, 11 Aug 2009 11:23:04 +0000 admin http://www.hddwiki.org/?p=389 The RAID is nothing but a simple combination of the several storage media. The storage media are necessarily the hard disk drives that are used for the storage of the data. The technology and the implementation of RAID are quite useful for the servers. The disk drives used for the purpose of the implementation of the [...]]]> The RAID is nothing but a simple combination of the several storage media. The storage media are necessarily the hard disk drives that are used for the storage of the data. The technology and the implementation of RAID are quite useful for the servers. The disk drives used for the purpose of the implementation of the RAID servers are nothing but just the normal hard disk drives that are used in the regular personal computers or the so called PC’s. The name RAID in simple English sentence can be defined as the “Just a Bunch of Disks”. This means that the RAID itself is a bunch of disks. (But Note that RAID and JBOD are two different terminologies).

If you have some storage disk drives or the secondary memory in a computer system then you possibly implement the RAID. It is also possible to configure the RAID system and install it. The RAID stands for the Redundant Array of Inexpensive Disks. The word Array specifies here that the disks are used like the arrays in the in any programming language. The disk drives are considered as the elements of this array. Hence the sentence “Just a Bunch of Disks“; justifies the meaning of the name RAID.

The implementation technique implies that they are traditionally made to behave as if they are independent disk drives inside the computer system. It is similar to the fact that the numbers of the hard disk drives are used in the Personal Computer probably two, three etc. Also in some of the software programs or some kind of computer application it may be desirable to use more than one disk drive; as if they are a one single disk volume. The use of more than one disk drive is called as the “spanning”. The most appropriate word for using more than one disk drive is called as spanning. This term of spanning is completely in contrast along with the term RAID that is the Redundant Array of Inexpensive Disks. The term JBOD “Just a Bunch of Disks” is in contrast along with the term RAID.

The partitioning is also a concept of dividing the physical disk into a number of different partitions that behave completely as the independent disks. The partitioning is usually logical and does not have any relevance to the physical levels of the disk drive. The JBOD can be considered as the opposite or the antonym of partitioning. The partitioning what it does is; it chops of the single physical drive into the smaller logical drive volumes. But at the same time in the JBOD what happens is that it combines the different physical disk drives into a larger logical drive volume. The method of JBOD does not provide any fault tolerance to the computer system. Even this JBOD do not provide any improvement in the efficiency or the reliability of the system.

The concept not even enhance the over all performance of the system. But in argument and in fact it does degrade the performance of the system that is in comparison with the usage of the independent disk drives. The performance is degraded by making it hard and difficulty in the usage of the disk drives in concurrency. That is in other words it degrade the performance by trying to optimize different disk drives for the many different or various users. What it requires is only a controller hardware card and a driver for that card that is essentially software. The only two advantages of JBOD over the RAID 0 are: 1) To avoid drive wastage and 2) It is easier in the case of any disaster recovery.

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]]> http://www.hddwiki.org/index.php/2009/08/11/raid-just-a-bunch-of-disks/feed/ 0 Software Vs Hardware RAID http://www.hddwiki.org/index.php/2009/08/11/software-vs-hardware-raid/ http://www.hddwiki.org/index.php/2009/08/11/software-vs-hardware-raid/#comments Tue, 11 Aug 2009 11:21:27 +0000 admin http://www.hddwiki.org/?p=387 Software RAID:

There are some disadvantages in implementing RAID in software. First of all the problem is with portability. Since a software implementation will definitely have Operating System specific components, these components should have to be rewritten for each Operating System to be functional. The second major problem is that it uses kernel mode software developers. Unlike [...]]]> Software RAID:

There are some disadvantages in implementing RAID in software. First of all the problem is with portability. Since a software implementation will definitely have Operating System specific components, these components should have to be rewritten for each Operating System to be functional. The second major problem is that it uses kernel mode software developers. Unlike many other applications, the ability to execute instructions and evaluate the contents of any virtual address without any safeguards gives some programming errors.

This can lead to crash in the system. System processors have to be very aggressive. Servers are networked to provide services to the clients. Due to this reason the effect of network traffic on servers is of great significance. Network interface cards can be used for transferring data to and from physical memory. In fact, they consume a large amount of CPU time.

The applications which are driving files and servers have a very less impact on the CPU, application servers has very severe impact on CPU. To understand we have to look at the application servers. Generally application servers are the back-end of business applications that satisfy the following requirements – high-availability, high-performance and redundancy. Consider an application server that has relational database. Anyone who is familiar with relational databases is generally aware of the expense of performing many of the standard operations. Operations such as inner joins in mathematical terms have an order of O-mn. where m and n are the size of the record sets.

Hardware RAID:

There are several advantages of implementing RAID in hardware. Firstly, we look at the embedded processors this is a heart of hardware RAID. Though embedded processors are engineered to be application-side. Is hardware RAID more good than software RAID? The answer is defiantly yes. It is portable operating system when compared to the Software RAID the server can continue to operate and even inform the user of the malfunction. If the server fails due to some undesired event, hardware RAID offers better availability compared to software RAID. Hardware RAID solutions are powered by battery backup that allow to maintain the coherency of their caches. Finally, one of the greatest advantages offered by hardware RAID is that the arena of embedded development is centered on the specialization for a target application.

These tests are being conducted to illustrate the superiority of hardware RAID to software RAID and the use of a mid-range controller for hardware RAID which is sufficient for the purpose of general application. The use a high-end hardware RAID controller can be expected to be superior at the higher-end. Thus from the above discussion, we can finally conclude that the hardware RAID is far more better than the Software RAID, thus we can say that the Hardware RAID is not only used for better performance of the application, but it can far good when compared to the Software RAID.

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]]> http://www.hddwiki.org/index.php/2009/08/11/software-vs-hardware-raid/feed/ 0 Hardware RAID by a controller http://www.hddwiki.org/index.php/2009/08/06/hardware-raid-by-a-controller/ http://www.hddwiki.org/index.php/2009/08/06/hardware-raid-by-a-controller/#comments Thu, 06 Aug 2009 05:27:11 +0000 admin http://www.hddwiki.org/?p=271 The physical implementation of the RAID is almost similar to the implementation of any other normal computer. The RAID may not be essentially any hardware that is used for [...]]]> The physical implementation of the RAID is almost similar to the implementation of any other normal computer. The RAID may not be essentially any hardware that is used for the implementation of the computer server. But it is the technology that is used for the implementation of the servers that are fault tolerant and provide better infrastructure support to the user. The Hardware involved in the implementation of the RAID includes the RAID controller device. The RAID controller device may be different in different types of the RAID. For example the RAID controller may be different for the IDE RAID, or the controller for the RAID in the case of the SATA may again be different. The RAID controller is also available for the SCSI etc.

The hardware at most apart from the RAID controllers that can be used in the RAID is the normal secondary storage media that is the hard disk. The only difference is that there are usually more than one hard disk drives involved in the implementation of the RAID.

The issue of controllers is the specific for the different types of the RAID. The RAID also has lots of levels. The levels may be either the Single Level RAID or the Multiple RAID Levels also known as the Nested RAID Level. The implementation of the hardware is different in the different levels of the RAID. The software may also be required in the case of any drivers being used for the RAID. The drivers may be even provided for the RAID controllers. The hardware is some what an essential issue as far as the RAID is concerned.

There are many issues that are related to the hardware part of the RAID. The most essential among them are the following that are described below. The description is given by considering the example for any of the RAID devices. The specific example here is the configuration of the hardware of the IDE RAID.

The major issues that can discussed one after the other are as follows: Fault survival, Data integrity, Physical stability and most importantly the performance of the system. The Physical stability of the system is important as the hardware may fail during the implementation of the disk drive. The stability of the system is of utmost importance to the user. The server should be stable so as to provide the support for the other terminals of the network. The fault tolerance is also a property that is associated with the hardware. The server in any case should be able to sustain the damage and provide better understanding to the other subsystems of the network.

The data integrity means that the data sent over the medium reaches the recipient terminal. The data that is sent over from the server should reach the other sub systems of the network. And also the data should be that only which was actually sent. This property is known as the data integrity. The basic reason for the RAID implementation is the performance of the system. The performance cannot be compromised in any situation when the RAID is used as the server. Hence the RAID is considered as the better performer in the implementation of the server over a network. The hardware failure could also affect the performance of the RAID.

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]]> http://www.hddwiki.org/index.php/2009/08/06/hardware-raid-by-a-controller/feed/ 0 Redundant Array of Independent Disks – RAID http://www.hddwiki.org/index.php/2009/08/06/redundant-array-of-independent-disks-raid/ http://www.hddwiki.org/index.php/2009/08/06/redundant-array-of-independent-disks-raid/#comments Thu, 06 Aug 2009 05:22:12 +0000 admin http://www.hddwiki.org/index.php/2009/08/06/redundant-array-of-independent-disks-raid/ The abbreviation for the RAID is Redundant Array of Independent Disks. This RAID by definition stands for the subsystem for the disks. The expectation for using this is the increment in the performance and the value added [...]]]> The abbreviation for the RAID is Redundant Array of Independent Disks. This RAID by definition stands for the subsystem for the disks. The expectation for using this is the increment in the performance and the value added services in the reliability. The major purpose of the system is to provide the fault tolerance subsystem which can provide efficiency and reliability to the over all performance of the system. The RAID is also used as a server for the reasons mentioned above. The RAID in the earlier history is also implemented by the software to enable the present abilities.

Since the purpose of RAID is for fault tolerant systems hence the design is suited for that purpose. The RAID technology is actually a set of standards. These standards are required to be followed for developing a fault tolerant storage system. The performance also matters a lot here. Hence in the mentioned above paragraph it is said that RAID has been implemented by only the software. The set of standards should be kept in mind before implementing the RAID. This is done using at least two ordinary hard disks and a RAID controller. The discussion regarding the RAID controller shall be dealt with in the upcoming sections.

The RAID has its origin starting from the year of 1980. At that time it was referred as the Redundant Array of Inexpensive Disks. This was in comparison with the storage system available at that time. The storage devices where quite expensive those days; so the implementation of a secure RAID drives was an important enhancement in the field of storage systems. Presently the prices of the memory whether it is the secondary memory like the hard disk, floppy drive, compact disk or any other storage media as well as the primary memory storage like the RAM etc, are all decreasing day by day. Hence by these statistics the RAID Advisory board modified the parameters from inexpensive to the independent.

The concept of mirroring and parity is also available in the RAID drives. In fact the property of fault tolerance is achieved by the process of mirroring and fault tolerance. The achievement is quite necessary for the purpose of providing a fault tolerant system.

The RAID system may have an altogether different drive for the sole purpose of replacing the drive that is failed or might have crashed. The RAID is drive that is replaced and is in spare is called as the hot spare. The hot drive is used in the case of an emergency where in the drive is the spare part that is used to fill in the gap provided by the crashed systems drive. Such a drive must always be ready and waiting. The physical state of such a drive is of quite importance where in the drive must be made available for the purpose of providing back up to the system. The replacement should be carried out immediately. So after the replacement is carried out now the entire system must be made aware of the fact that the hot spare drive is in use. And also the provision should be made for filling up the gap made by the hot spare drive. This is necessary if the other drives also fail and the condition is also possible even if the hot spare drive itself fails. But the RAID continues to dominate the technology that is used for the implantation of secure systems.

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]]> http://www.hddwiki.org/index.php/2009/08/06/redundant-array-of-independent-disks-raid/feed/ 0 Data Compass Premium,a famous RAID Data Recovery Tool http://www.hddwiki.org/index.php/2009/08/02/data-compass-premiuma-famous-raid-data-recovery-tool/ http://www.hddwiki.org/index.php/2009/08/02/data-compass-premiuma-famous-raid-data-recovery-tool/#comments Mon, 03 Aug 2009 03:52:41 +0000 admin http://www.hddwiki.org/?p=174 Data Compass Premium is a famous raid data recovery tool which produced by SalvationDATA.

(The disk data recovery equipment built to extract data from failed hard drives and RAID system.) Data Compass Premium is the tool you need on the last stage of the 3+1 Data Recovery Approach.

Data Compass Standard to Data Compass Premium – What’s added?

Data Compass [...]]]> Data Compass Premium is a famous raid data recovery tool which produced by SalvationDATA.

(The disk data recovery equipment built to extract data from failed hard drives and RAID system.)
Data Compass Premium is the tool you need on the last stage of the 3+1 Data Recovery Approach.

Data Compass Standard to Data Compass Premium – What’s added?

Data Compass Premium is a new version of our world-renowned Data Compass product.

  • – Extra ability of raid data recovery was added;
  • – An opportunity to import the image of the segment disks for analysis.

What can Data Compass Premium do?

  • -Data recovery from physically damaged HDDs is what Data Compass designed for, when extra ability of data recovery from RAID system was added in Premium version
  • Data recovery from HDDs with severe multiple BAD sectors, which appear because of platter surface scratch or malfunction or instability of the magnetic head assembly (MHA).
  • Data recovery from HDDs that start to produce “clicking” sounds, which may be caused by corruption of sector servo labels or a MHA malfunction. If some heads or surfaces are damaged it is possible (before installation of MHA replacement) to create a copy of data using the remaining good surfaces or drive heads.
  • Data recovery from drives (especially Seagate Barracuda 7200.7 and 7200.11 HDD) with cache problem, which manifests itself as the following: Hard drive can be detected normally, but any attempt to access the data area returned with error.
  • -Availability of tools for logical analysis of FAT and NTFS file systems in the software complex allows data recovery in cases, when a drive is functional and only logical data structure is corrupted.
  • -When used with malfunctioning drives, Data Compass complex often allows selective extraction of data necessary to your customers without reading all data from a drive (“recover data by file” without creating a complete disk image) saving a lot of time. In some cases, when drive malfunctions cause constant self-damage (like scratches on disks or instable MHA) these are the only means to accomplish this task. With the ShadowDisk technology adopted, users need not to worry about the drive degradation problem.
  • -Availability of utility for logical analysis (both manual and automatic) of RAID systems in the software complex allows data recovery in cases, when a RAID system is:
    1)with segment disk(s) missing;
    2)with parameters and/or configurations corrupted;
    3)with hardware array card or server system damaged.

Supported Drives:

Data Compass complex functionality is not restricted to a limited list of models, it works with any HDDs (ATA, Serial ATA) connected to Data Compass hardware controller, with any format of drive image created and also with all media that can be normally connected to standard computer ports and identified by its operating system (except for CD and DVD drives).

** The original port built in Data Compass is 3.5″ PATA, drives with other types of interaces are to be connected to Data Compass via adapters provided.

Supported RAID Type:

  • Raid 0
  • Raid 1
  • Raid 5
  • Raid 5E
  • Raid 5EE

** Include both the SNIA (Storage Networking Industry Association) Common RAID Disk Data Format Specification Revision 01.00.00 Compatible RAID 0, RAID 5, RAID 5E and RAID 5EE and the SNIA (Storage Networking Industry Association) Common RAID Disk Data Format Specification Revision 01.00.00 Incompatible RAID 0, RAID 5, RAID 5E and RAID 5EE, such as the following vendors and types:

  • HP/Compaq
  • AMI Linux-standard
  • Adaptec
  • Backward/ forward parity Dynamic

Related Posts

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