Troubleshooting
3–11
Table 3–3
(Continued)
Storage Enclosure Troubleshooting Chart
Symptom(s)
Probable Cause(s)
Corrective Action(s)
In a DSSI
VAXcluster
installation, one
or more of the
following symptoms
are observed:
-unexplained virtual
circuit (VC) closures
-unexplained VMS
crashes
-performance
degradation
1.
Excessive
ground offset
voltage between
DSSI VAXcluster
cabinets.
1.
Measure ground
offset voltage between
cabinets.
Correct faults in power
distribution system.
Install cabinet
grounding wire between
all cabinets sharing
DSSI buses.
2.
Loose or
missing DSSI
terminators.
2.
Tighten or replace DSSI
terminators.
3.
Low terminator
power voltage.
3.
Replace fuses.
4.
Bus length too
long.
4.
Shorten bus.
5.
Non DEC
devices on bus.
5.
Replace with DEC
devices.
6.
Terminated mid-
bus adapters
6.
Remove terminators
from mid-bus adapters.
Table 3–4
Disk ISE Fault Codes (for SF7x only)
READY
WRITE
PROTECT
FAULT
Disk ISE FRU
Off
Off
On
HDA
Off
On
Off
Drive module
Off
On
On
Drive module, then HDA
Summary of Contents for EK-SFXXS-SG-003
Page 1: ...DECarray Service Guide EK SFXXS SG 003 Digital Equipment Corporation ...
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Page 18: ...1 8 Introduction Figure 1 3 SF7x Series Storage Enclosure SHR_X1123C_89 ...
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Page 168: ...6 60 SF7x Storage Enclosure FRU Replacement Figure 6 18 Enclosure Internal DSSI Cables ...
Page 169: ...SF7x Storage Enclosure FRU Replacement 6 61 Figure 6 19 Enclosure Internal DSSI Cables cont ...
Page 170: ...6 62 SF7x Storage Enclosure FRU Replacement Figure 6 20 Enclosure Internal DSSI Cables cont ...
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