Intel SRCMR, Руководство пользователя

Страница: 25 / 180

Getting Started 25
Configurable SCSI Parameters
When a SCSI hard disk drive is initialized the first time by the RAID controller, its SCSI
parameters are automatically set to their optimal settings. Manual configuration is not required.
However, the RAID controller allows for the custom configuration of several SCSI parameters on a
hard disk drive-by-hard disk drive basis. There are several settings that can be configured by using
the Storage Console menu Advanced Setup
Å
Configure Physical Devices
Å
Select Physical Drive
Å
SCSI Parameter/Initialize. Most settings are set automatically and can not be configured
manually.
Table 1. Disk Drive SCSI Parameters
Parameter Setting/Value Description
Synch. Transfer Not
Configurable This setting when enabled allows the controller to operate in
synchronous transfer mode.
Synch. Transfer
Rate Not
Configurable Allows for the setting of the speed for the SCSI hard disks (160 MB/sec
for U160 drives). No matter the setting, the SCSI bus will negotiate the
fastest speed up to this setting. Lowering the setting will force the disk
drive to transfer at the lower speed.
Disconnect Not
Configurable Enabling this setting allows for the disk drive to disconnect from the
SCSI bus when it’s not participating in a transfer. This allows for
optimal bus utilization by all devices on the bus.
Tagged Queues Not
Configurable
When enabled, this feature allows the SCSI disk drive to execute more
than one command at a time.
Disk Read and
Write Cache On / Off For performance reasons, the Read Ahead and Write cache of the hard
disk drives should always be on.
Domain
Validation Not
Configurable
Using the <F4> key while in this menu accesses this parameter. When
this is set to
On , Domain validation allows for a cyclical check of the
correct data transfer at a given rate.