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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 SetupÅConfigure Physical DevicesÅSelect Physical Drive
ÅSCSI Parameter/Initialize. Most settings are set automatically and can not be configured
manually.
Table 1.
Disk Drive SCSI Parameters
Parameter
Setting/Value
Synch. Transfer
Configurable
Synch. Transfer
Not
Rate
Configurable
Disconnect
Not
Configurable
Tagged Queues
Not
Configurable
Disk Read and
On / Off
Write Cache
Domain
Not
Validation
Configurable
Getting Started
Description
Not
This setting when enabled allows the controller to operate in
synchronous transfer mode.
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.
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.
When enabled, this feature allows the SCSI disk drive to execute more
than one command at a time.
For performance reasons, the Read Ahead and Write cache of the hard
disk drives should always be on.
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.
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