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Chapter 2 Introduction to RAID
9
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. ADAC Ultra2 S466
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 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 ADAC Ultra2 S466 writes across multiple
drives. ADAC Ultra2 S466 supports stripe sizes of 2 KB, 4
KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB.