Avago Technologies LSI20160 - Manual (Page 63)

Using the Command Line Options 3-17
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Step 3. Click the Device Manager tab.
Step 4. Either double click on the SCSI controllers entry or click once
on the plus sign to the left of it.
One entry for each host adapter installed in the system
appears.
Step 5. Select the adapter desired, then click the Properties button.
Step 6. Click on the Settings tab.
Step 7. Type in the Adapter settings entry:
do_SCAM=1;
If an entry already appears there, type the above at the end of
the existing entry. Be sure to include the semicolon.
Step 8. Click OK to exit the Settings tab.
Step 9. Click OK again.
If you changed the entry, the System Settings Change dialog
box appears.
Step 10. Click Yes to restart the computer.
After the system reboots, SCAM is enabled for the selected adapter. To
disable SCAM, delete the entry that was made above. If other entries
exist, be sure to leave them intact.
3.5.4 Disabling Domain Validation Support
When the SYMC8XX.MPD , SYM_HI.MPD , or SYM_U3.MPD driver is installed,
support for Domain Validation is enabled. Domain Validation is a feature
of the adapter where the data transfer speed between the adapter and
each target is tested at system boot. If the test fails, the data transfer
speed is reduced and the test is repeated until a supported data transfer
speed is found.
However, some older SCSI devices do not properly support the standard
SCSI commands used during this testing, resulting in the system not
booting or a device not available. To allow these devices to operate
properly, you can disable the Domain Validation feature by using the
Device Manager for all adapters controlled by the respective driver, or by
using the SCSI BIOS Configuration Utility on a per device basis.