RAID 1E

RAID 1E, also known as hybrid mirroring, striped mirroring and enhanced mirroring, is a type of nested RAID level that uses two-way mirroring on a minimum of two disks.

In other words, RAID 1E combines RAID 0 with RAID 1. Data stripe is the first stripe, and the second is the mirror of the first data stripe shifted one drive. It is called mirrored stripe because a complete stripe of data is copied to another stripe within the set of disks. RAID 1E provides better performance and drive redundancy than RAID 1.

Formulation of RAID 1E requires at least three drives, and can support up to maximum of 16 drives. RAID 1E only allows one-half of the capacity of the array to be used. In the event of failure of any of the drives, the read / write operations are transferred to other operational drives within the array.

RAID 1E combines the capabilities of RAID 0 with the mirroring protection of RAID 1. While this RAID method may appear similar to RAID 10, there is a difference. RAID 1E has an odd number of discs for accomplishing data protection goals whereas RAID 10 uses an even number of discs.

RAID 1E needs a minimum of three discs. It works by stripping the data across all the discs. We have seen how RAID 0 is not an ideal configuration for organizations as the loss of any disc in the array causes the loss of all the data stored on the array. RAID 1E shifts the second copy of the data on every physical disc.

Also, RAID 1E is capable of offering more performance than RAID 1. As the number of discs is odd, it offers more spindles.

Go4hosting owns its own Data Center in India with 99.95% uptime and 24*7 technical support; mail us your requirement at [email protected]