07-12
17

Another hope for recovering files on failed RAID 5

Cloudy Happy

AuthorNoM   Category Related Resource   Comments0   Post Time 2007-12-17 20:04:17 -0500

RAID is acronym for Redundant Array of Independent Disks, also known as Redundant Array of Inexpensive Disks. It is use to increase reliability. You combine multiple physical hard disks into groups (arrays) that work as a single logical disk i.e. this array of drives appears to the computer as a single logical storage unit or drive.

RAID level 5 has following features:
    Striping with distributed parity
    Fault tolerance supported
    Redundancy supported (parity)
    Hot spare option supported
    Minimum 3 or more disk needed
    Performance: Good
    Protection: Good (if any disk fails data can be recovered)
Above characteristics makes RAID 5 popular and is well suited to transaction oriented environments.

What happens when hard disk fails in raid 5:
    Because of parity, information all data are available in case one of the disks fails. If extra (spare) disks are available, then reconstruction will begin immediately after the device failure.
    However if two hard disks fail at same time, all data are LOST.

Therefore, in short RAID 5 can survive one disk failure, but not two or more. Now, you have another hope for recovering failed raid 5 volume, just using Data Recovery Wizard Professional. Both of the "Deleted File Recovery" and "Complete Recovery" specifically appends this function, but for this situation, the latter one is more suitable in usage. What you need to do is only to check whether the failed volume to be detected or not in the device list window. It is very likely to see this volume if it suffered less damage. Then you have to go through the Intelligent Searching and Building directory process to get what you wish to recover most.

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Tags Tags: recovery,Recovery,raid5

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