Advanced Features 65
THE COMPUTER HANGS AT BOOT, HAS A LONG BOOT TIME, OR A SCSI
DEVICE IS NOT AVAILABLE —
Some older SCSI devices do not support Domain Validation operations, which is
a feature of Ultra320 SCSI. When the computer boots, it performs Domain
Validation to test the data integrity of the SCSI bus between the host adapter
and each SCSI device. With some older SCSI devices, the Domain Validation
operations can cause the device to stop responding to SCSI commands.
Check all internal and external SCSI bus cable connections. If the problem
continues, disable Domain Validation for a specific SCSI device. To disable
Domain Validation for a specific SCSI device, use the Fusion-MPT SCSI BIOS
Configuration Utility to set the Sync Rate to 0 (async) and the Data Width to 8.
The SCSI device runs in async/narrow mode and no Domain Validation
operations are performed on the SCSI device.
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