Avago Technologies LSI20160 - Manual (Page 249)

Using the Command Line Options 12-15
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Tagged Queuing:
qtags Syntax: qtags=[targetIDlist]
Default value: on
Valid options: on, off
Function: Enable/disable tagged queuing for the devices.
Enabling the qtags option results in the driver issuing tagged I/O requests to
the devices that support tagged queuing. Tagged queuing may improve I/O
throughput in devices that support such an option. Devices that do not support
tagged queuing are not issued tagged requests. Depending on the drive
controller, the use of queue tags increases throughput of the device. However,
the optimal number of queue tags is based on the specific device type.
Test Unit Ready:
testready
or
tur Syntax: testready=[targetIDlist]
Default value: on
Valid options: on, off
Function: Issues a test to ensure unit is ready during initial scan
This option allows you to disable issuing a test unit ready during the initial scan
to the specified target ID(s).
Verbose:
verbose Syntax: verbose=[targetIDlist]
Default value: off
Valid options: on, off
Function: Displays more detailed information on options and DOS
configuration.
This option is useful when multiple adapters are present in the system and the
PCI Device ID, the PCI Bus number, and the PCI Device/Function number for
each adapter needs to be known.
Width SCSI:
width
or
wide
or
wid Syntax: width=[targetIDlist]
Default value: on
Valid options: narrow, wide, off, on, 8, 16,
Function: Enable/Disable support of wide SCSI.
Possible Impact: No wide SCSI support available
The wide SCSI option allows you to disable support of a wide SCSI operation
when using a wide SCSI controller. Set this option to narrow, off, or 8 to disable
a wide SCSI device that is present on the system. For example, you would
disable it when an 8-bit SCSI cable is connected somewhere on the bus
between the wide SCSI host adapter and the wide device, thus prohibiting the
transfer of wide data. When you disable this option, the wide device still works,
but all data transferred to or from the device is narrow (8-bit). The driver does
not initiate a wide SCSI transfer request negotiation.
Table 12.1 Customizable Options for NWPA Drivers (Cont.)
Option Description