Device Scsi Channel Problems - Adaptec DuraStor 7220SS User Manual

other devices on the host SCSI channel. If you have a long SCSI
cable, try a different or shorter cable.
Problem: Only one array is displayed during host SCSI BIOS scan.
Check to ensure that LUN support is enabled. Use Display Array
Status to check the LUN assignment for each array. If LUN 0 is not
assigned to an array, or some other LUN numbers are skipped, use
the Change LUN Assignment option for each array until you have
LUN numbers starting at 0 with no LUNs skipped. You must
reboot the host system to recognize the new LUN assignment.
Problem: All arrays are displayed during host SCSI BIOS scan, but
only one array is seen by the OS.
SCSI drivers for some OSs require a parameter switch to enable
LUN support. For example, the NetWare driver, aic7870.dsk,
requires the driver parameter LUN_ENABLE=FF (in startup.ncf) to
scan for all LUNs. Check the driver documentation for your host
SCSI channel. You may also need to compact the LUN mapping.

Device SCSI Channel Problems

Problem: Not all disk drives connected to the controller device
channels are displayed during boot, or the controller hangs during
display of connected disk drives and never reaches the Adaptec Disk
Array Administrator screen.
Check your storage enclosure documentation to be sure that the
enclosure is properly configured for use with a RAID controller.
(The DuraStor 312R is configured properly.) If your storage
enclosure supports removable disk drives, check the disk drive
shuttles to be sure that the power, SCSI, and ID connectors are
properly seated. Check termination and ID assignment. If you have
enabled Ultra/Ultra2 SCSI on any device channels, try disabling it.
Note: Check the controller termination settings for all
channels.
Troubleshooting
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