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RAID Overview 2-5
Copyright © 2002 by LSI Logic Corporation. All rights reserved.
Figure 2.1 Disk Striping
Disk striping involves partitioning each disk drive’s storage space into
stripes that can vary in size from 2 to 128 Kbytes. These stripes are
interleaved in a repeated, sequential manner. The combined storage
space is composed of stripes from each drive. MegaRAID SCSI 320-0
supports stripe sizes of 2, 4, 8, 16, 32, 64, or 128 Kbytes.
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.
2.3.5.1 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.
Segment 1
Segment 5
Segment 9
Segment 2
Segment 6
Segment 10
Segment 3
Segment 7
Segment 11
Segment 4
Segment 8
Segment 12
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