HP PCIe U320 User Manual page 28

Fallback Sync
Rate (MB/s)
Bus Reset Delay
(sec)
Quick Arbitrate
& Select
LUNs
Allow Disconnect
Tagged Com-
mand Queuing
Sync Offset
Sync Enabled for
this ID
28
Configuration tool
Choices: 40/20, 20/10, and 10/5
Default: 40/20
Specifies the maximum synchronous transfer rate to be negotiated when the
adapter detects a Single-Ended SCSI bus. The bus is Single-Ended when Ultra
SCSI devices are connected to the bus.
Read only; no choices
Default: 3
The time delay between the reset of the SCSI bus and the scanning of the
SCSI bus. This is a read-only parameter.
Choices: Disabled, Enabled
Default: Enabled
If enabled, improves performance by reducing the time required to gain
control of the SCSI bus. QAS can only be enabled if all target settings are set
to Sync DT-IU and all devices on the bus support QAS.
Choices: Disable ID, 0, 0–7, 0–63
Default: 0–7
Specifies the number of LUNs that the driver addresses when scanning for
devices, determined as follows:
• Disable ID: Target ID is bypassed and not scanned
• 0: Scan LUN 0 for this target ID
• 0–7: Scan LUNs 0 to 7 for this target ID
• 0–63: Scan LUNs 0 to 63 for this target ID
Choices: Enabled, Disabled
Default: Enabled
Specifies whether a device is allowed to disconnect from the SCSI bus during
SCSI command processing. The device determines when it disconnects. This
setting does not force the device to disconnect.
Choices: Enabled, Disabled
Default: Enabled
Specifies the driver if SCSI commands can use the Tag Command feature to
send multiple commands to a device.
Choices: 0–127
Default: 127
The defaults offer the best performance possible. The value should not be
changed unless instructed by an HP Support representative.
Choices: Enabled, Disabled
Default: Enabled
Specifies whether the selected target transfers data as synchronous transfer
rates or at the asynchronous rate. The maximum synchronous rate to negotiate
is specified in the Sync Rate parameter.