Chaparral K5312/K7313 - Manual (Page 128)

G- and K-Series User’s Guide
9-4
conflict with any 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 assure that LUN support is enabled. Most SCSI host adapters, such as the
AHA-2940U2W, ship with LUN support disabled by default. 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 operating system.
SCSI drivers for some operating systems 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 LUN’s. 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 drives connected to the controller device channels are
displayed during boot, or the controller hangs during display of connected
drives and never reaches the Disk Array Administrator screen.
Check your array enclosure’s documentation to be sure that the enclosure is properly
configured for use with a RAID controller. If your enclosure supports removable
drives, check the drive shuttles to be sure that the power connectors, SCSI connectors,
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.
Problems During Bootup
The following sections describe problems you might encounter during Power On
Self-Test (POST) or during bootup and explain how to resolve those problems. POST
shows problems related to the processor, logic, and memory.