Are you trying to find information about Raid 4 data recovery?
If you are, you will soon enough find out that the actual RAID 4 recovery process is similar to all other RAID 4 data recovery techniques.
The biggest difference that you will find is the actual set up of the system and the way the disk drives store data.
In order for a configuration to be considered a RAID 4 there must be a minimum number of 3 drives.
Although this is the minimum number of drives, the three drive setup isn’t very common due to the fact that it lacks redundancy.
One of the key strengths to RAID 4 is the fact that it allows for simultaneous read requests when data striping.
Data striping more or less refers to the way that the data is segmented. In the RAID 4 configuration, it’s able to segment the data in a logically sequential way. When the segmentation is done this way, the data can be accessed concurrently, which allows the processor to not have to wait to access data.
The biggest weakness that has been noted of the RAID 4 data recovery is that there is a single parity bottleneck.
In this case parity refers to the approach used in an attempt to verify if data has been lost or in some other way compromised.
RAID 4 data recovery would become necessary if any one of the disk drives in the configuration suffered any level of damage that caused data to be lost or damaged.
Unlike other configurations of RAID the data in RAID 4 is not mirrored, so there is no other copy of the data that is simultaneously made when it is being written. One of the most commonly used techniques in RAID 4 data recovery is to start the recovery process at the drive right before the one that suffered damage, and then to perform the recovery on the disk drives directly after.
Though in many cases, significant amounts of data can be recovered, it isn’t uncommon at all for at the very least, a minimal amount of data to be lost especially if it is a case of physical damage being done to the drives. One way to avoid this is to consider a configuration that at the very least includes the ability to have data mirrored in some way as it is written, which is often the case with a RAID 2 configuration.