It is important to understand that a RAID 0 array, whereby the data is striped across each disk at the block, does not have any built in redundancy. It is therefore necessary to that you have a backup strategy in place otherwise your data will be at serious risk. Any failure, be that physical or logical will almost certainly result in a RAID 0 data recovery being necessary.
A RAID 0 server array is required when data transfer rates are of the utmost importance, but as stated this comes an attached risk. If the speed requirements are not met by using a RAID configuration which includes redundancy, a RAID 0 array will be the most suitable solution. A backup plan is essential, because any failure could result in data loss, the extent of which can only be ascertained through the data recovery process.
All About Speed
There are two main features which give RAID 0 a distinct advantage from a sales point of view. Firstly all data blocks can be used in the file system, giving an increased data capacity over other RAID schemes. Secondly there is an inherent underlying increase in speed this configuration gives over other schemes, allowing faster data transfer rates.
This increase in speed is possible, because the seek time for each read and write operation to a disk is distributed across the full array. This distribution means that through data buffering, the significance of the seek time on any signal disk is reduced.
Lack of Redundancy
The lack of any in-built redundancy is the single biggest disadvantage encountered when using a striped RAID 0 array. For the successful operation of this type of RAID array, all the disks must be functioning correctly otherwise the array will fail and go off-line.
If a RAID 0 array fails, the only solution available, other than data recovery, is to restore the data from another source, such a backup tape cartridge. If any data has been written or changed since the last backup, it can however only be restored using a RAID 0 data recovery service.
Data Recovery from RAID 0
The most common reason for the failure of a RAID 0 striped array is the failure of one or more of the hard disk drives. The risk to your data depends upon the extent of the failure, which could range from minor damage, right through to an almost catastrophic loss of data.
Another consideration to take in account is that most RAID arrays are constructed using a set of hard disk drives obtained from the same source and batch, and then operate within the same environment. Hard disk drives tend to fail at a similar rate when operating in similar conditions, which means that when one drive fails, the likelihood is that any or all of the other drives are close to failing.
In the event of a failure, it is imperative to power down the server before seeking help from a RAID data recovery specialist, who can minimise the risk of further damage. If the damage is too severe or a disk has completely failed, a data trawl of the may be the only option left open for data recovery.