RAID Data Recovery

RAID 1 Systems

Single level RAID 1 is the simplest RAID configuration requiring just two disks of equal size. When data is written to a RAID 1 array, it is written to one disk and simultaneously copied or "mirrored" to a redundant disk.

If one drive of a RAID 1 array fails, the system will continue to operate using the redundant disk. Raid 1 arrays are built for security. Instead of writing data to 1 disk, RAID 1 arrays write the same data to two disks. The following is a simple example illustrating how RAID 1 works. Say we have a text file that consists of four characters "ABCD" and a RAID 1 array of two disks.

Text in file

Here's what happens when we save the file:

RAID 1 system is very simple. Recovering data from a simple RAID 1 system is exactly the same as recovering data from a single disk.