Raid 0+1; Raid 3 - Xerox SAFEStor User Manual

SAFEStor User Guide

RAID 0+1

RAID 0+1 is a combination of RAID 0 and RAID 1, combining stripping with disk mirroring.
RAID Level 0+1 combines the fast performance of Level 0 with the data redundancy of Level 1.
In this configuration, data is distributed across several disk drives, similar to Level 0, which are
then duplicated to another set of drives for data protection.

RAID 3

RAID 3 provides disk striping and data redundancy though the use of a dedicated parity drive.
RAID 3 breaks up data into smaller blocks, calculates parity by performing an exclusive-or
operation on the blocks, and then writes the blocks to all but one drive in the array. The parity
data created during the exclusive-or operation is then written to the remaining drive in the array.
If a drive fails, data on the failed drive can be recovered using the information on the parity
drive. RAID 3 is the best choice for applications that require very fast data transfer rates or large
data transfers.
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