RAID 1 data recovery is necessary when a RAID 1 configuration is used.
The minimal configuration for this would be 2 disks, and will rise in increments of 2 as this particular configuration must be an even number of disks.
This particular set up refers to the fact that the disks have been set up to essentially mirror each other. So, as soon as data is written to one disk, the same information is mirrored or copied to another disk at the same time.
The primary benefit to this particular configuration is that it provides complete data redundancy, which better protects your data in the event of a drive failure.
There are two different types of setups that refer specifically to RAID 1 which I will briefly touch on below:
Software RAID 1 refers to the fact that the disk drive relies largely on a combination of an SDC (standard drive controller) and a software utility to manage the various drives included in the RAID 1 volume.
Remember, in order for it to be considered RAID 1 it must be an even number of drives. Many professionals have said that they prefer the Software set up as they feel that it is more reliable, and not as vulnerable as a hardware set up, as it is typically not subject to wear and tare.
Hardware Raid 1 is when the volume relies on a physical controller to do the mirroring of data for all of the drives in the volume.
The biggest complaint or problem that has been talked about with this set up is that because it is hardware, it is subject to failure on a much larger scale than when software is being used. However, there are a large number of professionals out there that swear by this set up and refuse to use the alternative.
The biggest benefit to using a RAID 1 configuration is that all of the data is essentially written and mirrored twice, so if there is a failure on one drive, in many cases, the data is still safe and secure on the drive that is doing the mirroring.
This makes RAID 1 data recovery much easier to perform. Of course with the good, comes some bad, right? Because there has to be a mirror drive for every drive in the configuration, you lose a considerable amount of physical storage capacity.
In addition, because of the way the drives are set up to mirror, if bad or corrupted data is written to one drive, it is automatically mirrored to the other drive as well, which is when the need for RAID 1 data recovery increases exponentially.