RAID Levels

Here are the RAID levels used in this solution:

RAID Level 0 -- Striped Data. RAID Level 0 does not have any built-in fault tolerance and should not be used for critical data.

RAID Level 1 -- Mirrored Data. This RAID level provides for an exact copy of all data and protects against the loss of a single disk.

RAID Level 5 -- Striped Data and Striped Parity. RAID Level 5 uses parity, striped across all the drives in the RAID store, to recreate data from a failed disk. Provides for FAST read performance, since the data is striped across multiple disks, but degraded write performance since each write needs to perform a parity calculation. RAID Level 5 protects against a single disk failure.

RAID Level 0+1 or 10 -- Striped data across multiple mirrored pairs. RAID Level 10 provides the fastest read and write performance while protecting against multiple disk failures.

RAID level 100 -- Not currently an official RAID level. Multiple RAID level 10 volumes are striped using software RAID level 0. File systems should be striped across multiple HBAs to achieve fastest performance.

RAID level 51 -- Not currently an official RAID level. Two RAID level 5 volumes mirrored using software RAID level 1.