Smart Array 5300 Controller User Guide

Configuring an Array
Compaq Smart Array 5300 Controller User Guide 7-13
COMPAQ CONFIDENTIAL
Writer: John Turner File Name: h-ch7 configuring an array.doc
Codename: SilverHammer Part Number: 135606-004 Last Saved On: 7/22/02 10:58 AM
Figure 7-11: Create Logical Drive screen
Three features on this screen merit further description:
• Stripe Size box
• Logical Drive Size box
• Advanced button
The Stripe Size box has a drop-down list that lets you select the width of a data
stripe. (This width corresponds to the size of a data block on each hard drive in the
logical volume, as described in Appendix D).
Each RAID level supports several stripe widths (Table 7-2); the default stripe size
initially displayed by ACU is chosen for optimum performance under the most
common operating conditions. Table 7-3 suggests how to change the stripe width to
optimize system performance for different types of application.
Table 7-2: Supported Stripe Sizes for a Given RAID Level
Fault Tolerance Level Supported Stripe Sizes (KB) Default (KB)
RAID 0, RAID 1+0 8, 16, 32, 64, 128, 256 128
RAID 5, RAID ADG 8, 16, 32, 64 16