The use of the acronym RAID (Redundant Array of Independent Disks) suggest a level of redundancy, but for a RAID 0 array, there is none. It is important that this is understood, as a backup strategy is of even greater importance than any other type of RAID architecture, as the failure of any disk will cause a failure of the RAID 0 array.
In the event of a RAID 0 array failing, the only sensible action to take, is to contact a RAID data recovery specialist, who can assess the data and determine the level extent of the damage. Recoveries from RAID 0 arrays, range from a complete recovery of the files, right through to an almost complete loss of data, where only a data trawl to extract files of known types can be performed.
Reason for RAID 0 is Speed
By distributed the data across all the disks in discrete stripes, a significant increase in data transfer speeds can be achieved. For any single hard disk drive the main factor determining access speed is the seek time. By using multiple disks the effect of individual seek times is significantly reduced, particularly for sequential data access.
Beside the underlying increase in data transfer speed, the other major selling point of a RAID 0 configuration, is the ability to use the entire capacity of all drives. This does however, as already noted provide no level of redundancy, so it is of the utmost important that a backup strategy is employed.
If a single hard drive fails it will result in a total failure of the entire RAID 0 array with data recovery the only available solution unless the data can be restored by another method. Another factor which needs to be taken into consideration is that even if the failed drive is recoverable, most RAID 0 arrays are built from disks purchased at the same time from a single supplier and the same batch. The disks then operate in the same environment constantly which means that once one drive fails, the likelihood of another failure within 24 hours is high.
RAID 0 Data Recovery
The most common reason for the failure of a RAID 0 array is due to the failure of at least one drive, and depending upon the extent of that failure, the results may be catastrophic. It is therefore of the utmost important, to seek help from a professional data recovery service such as DiskEng, who can minimise the risk of the failure being made worse through incorrect handling of the disks.
It is also important that the data from all drives is secured before any further data recovery procedures are undertaken. A failure to secure the data would be a serious risk and negligent, which could lead to a situation where the only option available is a data trawl, which will only recover small files, with no associated file names. If one drive or more drives are unrecoverable a data trawl may also be the only option so it is important that immediate action is taken following the failure of a RAID 0 data volume.