Compaq StorageWorks HSZ70, Руководство по установке, Страница: 58 / 168

6-2 HSZ70 Solutions Software V7.7 for Novell NetWare - PCI
Compaq Confidential – Need to Know Required
Writer: Robert Young Project: HSZ70 Solutions Software V7.7 for Novell NetWare - PCI Comments:
Part Number: AA-R8JUE-TE File Name: g-ch6 Creating Your Storage Configuration with the CLI.doc Last Saved On: 5/17/00 9:16 AM
Configuration Guidelines
Use the following guidelines to configure the HSZ70 controller and your host
system to optimize system performance.
Controller Configuration Guidelines
1. Evenly distribute the devices across separate busses (ports). This
permits parallel activities on the controller’s available busses (ports) to
the attached devices.
2. Mix higher and lower performance devices on the same port. For
example, use 7200 rpm and 5400 rpm drives on the same port.
3. Evenly set preferred targets across both controllers in a dual-redundant
configuration.
4. Evenly distribute logical units across separate targets; that is, use
different SCSI IDs, if possible. The subsystem supports a maximum of
eight SCSI IDs.
5. Avoid configuring multiple mirrorsets with the first member being on
the same port. Configure multiple mirrorsets as similar to the following
example:
add mirrorset mirr_1 disk10000 disk20000
add mirrorset mirr_2 disk20100 disk10100
The default mirrorset read selection algorithm will choose the first member of
the mirrorset if the mirrorset does not already have a read queue.
Host System Configuration Guidelines
You get optimal host system performance when you have a minimum of six
processes running concurrently. This takes advantage of the command tag
queuing and multi-controller ports of your subsystem.