Toshiba Magnia 560S - Manual (Page 31)

RAID Overview
Introduction to RAID
13
Disk Striping
Disk striping writes data across multiple disk drives instead of just one disk drive. Disk
striping involves partitioning each drive storage space into stripes that can vary in size
from 2 KB to 128 KB. These stripes are interleaved in a repeated sequential manner.
The combined storage space is composed of stripes from each drive. RAID Controller
Kit-G supports stripe sizes of 2 KB, 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB.
For example, in a four-disk system using only disk striping (as in RAID level 0),
segment 1 is written to disk 1, segment 2 is written to disk 2, and so on. Disk striping
enhances performance because multiple drives are accessed simultaneously; but disk
striping does not provide data redundancy.
Stripe Width
Stripe width is a measure of the number of disks involved in an array where striping is
implemented. For example, a four-disk array with disk striping has a stripe width of
four.
Stripe Size
The stripe size is the length of the interleaved data segments that RAID Controller
Kit-G writes across multiple drives. RAID Controller Kit-G supports stripe sizes of 2
KB, 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB.