LSI MegaRAID Express 500 - Manual (Page 26)

MegaRAID Express 500 Hardware Guide 12
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. MegaRAID Express 500
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 MegaRAID Express 500
writes across multiple drives. MegaRAID Express 500 supports stripe sizes of 2 KB, 4
KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB.