 | ||
| RAID 0+1 | ||
|---|---|---|
| Prev | RAID-5 and RAID 0+1 | Next |
Mirroring with striping, RAID 0+1, offers the protection of mirroring and the speed of striping.
The following are some advantages of RAID 0+1 volumes:
Very large fault-tolerant volumes can be created that can hold large databases or server applications.
Read performance is very high. A preferred plex can be designated. Within each plex, striping balances the load.
The write penalty (that is, the multiple writes SFW must perform to keep all plexes' contents synchronized) is mitigated by the striping of data across multiple disks.
About the only disadvantage to RAID 0+1 is the hardware cost. The user must purchase, house, power, and operate twice as much raw storage capacity as the data requires. Today with lower storage costs, mirroring with striping is a preferred RAID layout for mission-critical data.