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RAID-1 Enhanced - Data Strip Mirroring (RAID-6 / RAID-10)



RAID-1 Enhanced - Data Strip Mirroring (RAID-6 / RAID-10)

RAID level 1 supported by the IBM Server 95 Array system provides an enhanced feature for disk mirroring that stripes data and copies of the data across all the drives of the array. The first stripe is the data stripe, the second stripe is the mirror (copy) of the first data stripe, but shifted one drive. Because the data is mirrored, the capacity of the logical drive, when assigned to RAID 1 Enhanced, is 50% of the physical capacity of hard disk drives in the array. Some vendors have also referred to this as RAID-10, the combining of RAID-0 and RAID-1 while other vendors use RAID-6, the next available RAID number.

 RAID-1 (Enhanced - Data Strip Mirroring)
                      +----------+
                      |   DISK   |
                      |Controller|
                      +----+-----+
                 +---------+---------+
                 |         |         |
              +--+--+   +--+--+   +--+--+
 Data         | AAA |   | BBB |   | CCC |
              |-----|   |-----|   |-----|
 Data Mirror  | CCC |   | AAA |   | BBB |
              |-----|   |-----|   |-----|
 Data         | DDD |   | EEE |   | FFF |
              |-----|   |-----|   |-----|
 Data Mirror  | FFF |   | DDD |   | EEE |
              +-----+   +-----+   +-----+
               Disk 1    Disk 2    Disk 3

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