User guide

6-30 Compaq Smart Array 431 Controller User Guide
Stripe Size
Stripe size refers to the amount of data stored on each physical drive in one
stripe of a logical drive. Each RAID level has a default value (Table 6-1) plus
a range of supported sizes. The default values were determined to provide
optimum performance for that RAID level in many applications. However,
your application may benefit from setting the stripe size to a different value.
To select a stripe size other than the default, click the down arrow next to the
current stripe size and select from those available.
Table 6-1
Stripe Size Fault Tolerance
Fault Tolerance Level Default (KB) Valid Stripe Sizes
(KB)
Raid 0 128
8, 16, 32, 64, 128,
256
RAID 1/RAID 0+1 128
8, 16, 32, 64, 128,
256
RAID 5 16
8, 16, 32, 64*
*RAID 5 does not support stripe sizes larger than 64KB per drive.
Online RAID Level and Stripe Size Migration
To change the RAID level and stripe size without loss of data or system
disruption, use the Online RAID Level and Stripe Size Migration screen. From
this screen you can reconfigure a currently configured logical drive to a new
fault tolerance (RAID) level or a new stripe size.
NetWare Online Array Configuration Utility
(CPQONLIN)
The NetWare Online Array Configuration Utility, also called CPQONLIN, is
an NLM for configuring your drive arrays without shutting down your server.
CPQONLIN also provides information about the status of drives attached to
the Smart Array 4250ES. It indicates drive failure, expansion, or waiting for
expansion or rebuild (queued). Before loading CPQONLIN.NLM, you must
load the appropriate device driver

CPQARRAY.HAM. CPQONLIN.NLM is
located in the ONLINE directory of Novell SSD Disk 4. See driver installation
information in the NetWare section of Chapter 7.