User`s guide

2.3 Mass Storage Problems Indicated at Power-Up
Mass storage failures at power-up are usually indicated by read fail messages.
Other problems are indicated by storage devices missing from the show config
display.
• Table 2–3 provides information for troubleshooting mass storage problems
indicated at power-up or storage devices missing from the show config
display.
• Table 2–4 provides troubleshooting tips for AlphaServer systems that use the
SWXCR-xx controller.
• Section 2.4 provides information on storage device LEDs.
Use Tables 2–3 and 2–4 to diagnose the likely cause of the problem.
Table 2–3 Mass Storage Problems
Problem Symptom Corrective Action
Drive failure Fault LED for drive is on
(steady) (Section 2.4).
Replace drive.
Duplicate SCSI IDs Drives with duplicate SCSI
IDs are missing from the
show config display.
Correct SCSI IDs. May
need to reconfigure internal
StorageWorks backplane
(Section 5.8).
SCSI ID set to 7
(reserved for host ID)
Valid drives are missing
from the
show config
display.
One drive may appear
seven times on the show
config display.
Correct SCSI IDs.
Duplicate host IDs on
a shared bus
Valid drives are missing
from the
show config
display.
One drive may appear
seven times on the
show
config display.
Change host ID through the
pk*0_host_id environment
variable (
set pk*0_host_id ).
Missing or loose
cables. Drives not
properly seated on
StorageWorks shelf
Activity LEDs do not come
on. Drive missing from the
show config display.
Remove device and inspect cable
connections. Reseat drive on
StorageWorks shelf.
(continued on next page)
Power-Up Diagnostics and Display 2–9