Installation manual

77 ATTO Technology Inc. ATTO Utilities Installation and Operation Manual
Sync Offset
Choices: 1-127
Default: 127
CAUTIONCAUTION
The default values offer the best
performance possible. Do not change
this setting unless instructed by an ATTO
technical support representative.
Sync Rate
Choices: varies by adapter, see Exhibit 2.2-1
Default: varies by adapter, see Exhibit 2.2-1
If synchronous transfers are enabled, sets the maximum
rate at which the ExpressPCI storage controller
negotiates with each device attached to it. Set the rate to
the maximum value supported by the storage controller.
If excessive SCSI errors occur, you have long cables or
there are many devices on the bus, you may want to
reduce the
Sync Rate value. Slowing the transfer rate
may increase the reliability of the SCSI bus.
Tagged Command Queuing
Choices: Yes, No
Default: Yes
Specifies to the driver which SCSI commands can use
the
Tag Command feature. The driver can send
multiple commands to a device when tag commands are
enabled.
Exhibit 2.2-1 Sync rate parameters for various ATTO storage controllers.