Compaq HSG80 - StorageWorks RAID Array Controller Specifiche Scaricare il pdf (Pagina 89)

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Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide

For a comprehensive discussion of RAID, refer to The RAIDBOOK—A Source Book

for Disk Array Technology.

Using Stripesets to Increase I/O Performance

Stripesets enhance I/O performance by spreading the data across multiple disk drives.

Each I/O request is broken into small segments called “chunks.” These chunks are

then “striped” across the disk drives in the storageset, thereby allowing several disk

drives to participate in one I/O request to handle several I/O requests simultaneously.

For example, in a three-member stripeset that contains disk drives 10000, 20000, and

30000, the first chunk of an I/O request is written to 10000, the second to 20000, the

third to 30000, the fourth to 10000, and so forth until all of the data has been written

to the drives.

Figure 4–3. Striping Lets Several Disk Drives Participate in Each I/O Request

CXO5507A

Chunk 1

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 395 396

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