Other RAID Levels

Whilst it is relatively uncommon these days to see data storage arrays that do not employ RAID 1 or RAID 5, TRC do often get called in to help retrieve data from other failed RAID sets.  Our technical expertise can help you to recover the following types of array:


RAID 3 works in a very similar way to RAID 5 except for the data is striped at the byte level rather than a block level.  Redundancy is provided by a dedicated parity disk rather than the distributed parity used within RAID 5.  This enables the array to be rebuilt and recovered after the failure of any single disk within the array.  In the event of multiple drive failure or data corruption, TRC can help to recover your data.


RAID 6 is an evolution of RAID 5 that is resilient against the failure of 2 members of the array, rather than a single set of distributed parity as found in a RAID 5 array.  Given the extra redundancy of RAID 6 total failures of the array are rare.  In instances where this occurs TRC are normally able to fully recover your lost data.

RAID 1+0 (RAID 10)

RAID 1+0, often simplified to RAID 10 is what is known as a nested RAID array.  RAID 10 takes 2 or more mirrored pairs of hard drives and then stripes the data between these mirrors to create an array that has speed benefits and redundancy against the loss of individual drives to protect against loss of data.  RAID 10 can handle multiple drive failure providing that all of the failed units do not fall within the same stripe.

RAID 0+1

Another nested RAID level and very similar to RAID 10 is RAID 0+1.  In RAID 0+1 rather than having mirrored pairs that are then striped together we instead have striped arrays that are subsequently mirrored to an identical (or multiple identical) stripe sets.  As with RAID 10 multiple device failure can be tolerated, providing that a mirror of the failed device or devices exists somewhere within the array.


RAID 50 is another common nested array type, in RAID 50 a number of RAID 5 arrays (two or more) are configured into one stripe set.  In doing so, redundancy is provided for 1 disk failure within each of the stripe members.

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