Avago Technologies LSI20160 - Manual (Page 245)

Using the Command Line Options 12-11
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The alpha-case does not matter, so you can intermix upper and lower
case in any way.
Table 12.1 lists the customizable options for your NWPA
HAM drivers.
Table 12.1 Customizable Options for NWPA Drivers
Option Description
Autosense:
autosense
or
asense Syntax: autosense=<option>[targetIDlist]
Default value: on
Valid options: on or off
Function: Enables sense data to be returned automatically for the specified
target.
This option allows you to disable sense data if third party drivers do not support
the autosense feature of the LSI Logic host adapters.
Domain Validation:
domainvalidation
or
dv Syntax: domainvalidation=<option>[targetIDlist]
Default value: None
Valid options: on, off, no width, nowrrd, noread
Description of each option: domain validation on, all domain validation off,
no domain validation for width settings, do not perform read/write cycle, do not
perform media read
Function: Control domain validation options for the Target ID.
This option is a software procedure in which a host queries a device to
determine its ability to communicate at the negotiated width and sync rates.
Domain Validation is performed at system boot time to test the data integrity of
the SCSI bus between the host adapter and each target device. Note that
some older SCSI devices do not tolerate Domain Validation operations.
Elevator Threshold:
elev Syntax: elev=<option>[targetIDlist]
Default value: 4
Valid options: 0–250 (0=disable)
Function: Specify the maximum number of I/Os the HAM should queue before
allowing NWPA to filter and organize requests.
This option allows you to use NWPA elevator queues to determine how many
I/Os are queued to the HAM before organizing requests and generating
scatter/gather lists. If this number is set too low, adapter I/O starvation may
result. If the number is too high, then sorting of I/Os and/or generation of
scatter/gather lists may not occur. Varying the elevator threshold value may
affect performance.