Retrodata recover RAID data from any RAID level.
Standard RAID level recovery.
RAID 0. Not really RAID at all, since there is no redundancy. Provides high throughput and maximum storage. Any drive failure prevents access to data. Not recommended for data storage.
RAID 1. Mirroring with no parity or striping, identical copies of the data are stored on each drive. One drive can fail and the array will continue operating. Writing is slightly slower than a single drive, although reading is marginally quicker. Often used for Operating System installations.
RAID 3. Byte-level striping with parity stored on a dedicated disk. The rotation of each drive’s spindle is synchronised. Data is stored as sequential bytes across the disks. Extremely high throughput. It survives a single drive failure. Commonly used in Xsan storage for video editing and post production, configured as RAID 30 with a huge, 1MB stripe size. (Two RAID 3 arrays, striped.)
RAID 4. Similar to RAID 3, but used block-level striping (as opposed to byte-level) and also has a dedicated disk for parity. Each drive can act independently when blocks of data are requested, meaning RAID 4 can handle multiple, simultaneous requests.
RAID 5. The commonest RAID level we encounter in Business storage. Utilises block-level striping and parity is distributed across all the disks. Can survive the failure of one disk, at which point it runs in “degraded mode” and will continue to do so until the failed disk has been replaced and the RAID rebuild completed.
RAID 6.Block-level striping with double distributed parity. Almost like adding another parity block to RAID 5, two parity blocks are distributed across all disks. Can survive two simultaneous drive failures. Very suitable for large RAID arrays where downtime would be drawn out due to the time taken for RAID rebuild of these large RAID arrays, during which extremely lengthy process there is the chance of another drive failing. Throughput depends on the efficiency of the RAID controller engine.
Hybrid RAID levels
Please see here
Proprietary RAID levels
Please see here
