Configuration of interleaved parity groups

If RAID configurations are RAID1 (2D+2D) or RAID5 (7D+1P), the interleaved parity group can be created by concatenating multiple of parity groups. The following table lists the RAID configurations and the number of parity groups that can be concatenated.

When concatenating parity groups, data in LDEVs that are FV or CV is allocated between the interleaved parity groups. Therefore, loads are dispersed because of the parity group concatenation, and the LDEV performance is improved.

The capacity of the created LDEV is managed by each of the parity groups that are in the interleaved parity group. The maximum capacity of an LDEV is the same as the capacity of the interleaved parity group.

See the following examples:

• Creating the interleaved parity group by concatenating of parity groups of PG1-1 and PG1-2.
• Creating LDEVs in each parity group that are in the interleaved parity group.
  • LDEV 1 in PG1-1
  • LDEV 2 in PG1-2