We had a power blink last week that seems to have left some of
the SCSI devices on the external bus in a weird state. The devices that
kept generating errors were the Exabyte 8505 tape drive and a 4 GB disk
(r^2, I assume a seagate is inside), but several other devices acted up
as well. The uerf messages were like this one:
=========================================================================
----- EVENT INFORMATION -----
EVENT CLASS ERROR EVENT
OS EVENT TYPE 199. CAM SCSI
SEQUENCE NUMBER 1326.
OPERATING SYSTEM DEC OSF/1
OCCURRED/LOGGED ON Mon Jan 19 11:55:57 1998
OCCURRED ON SYSTEM dilbert
SYSTEM ID x00060004 CPU TYPE: DEC 3000
SYSTYPE x00000000
----- UNIT INFORMATION -----
CLASS x0000 DISK
SUBSYSTEM x0000 DISK
BUS # x0001
x0040 LUN x0
TARGET x0
=========================================================================
Target 0 (4 GB disk) generated almost all of them, but there
were a couple from target 6 (Exabyte) and target 2 (another 4 GB
disk). Taking the target 0 drive off, makes things more stable. The
thing that is strange is that the problems seem very intermittent.
Everything will be ok and then the other drives (not the listed
targets) start acting up and saying "permission denied" when you try to
access them. Does this make any sense? Do the CAM messages really
indicate that a device has a real problem even if it intermittent?
I am a little flustered because process of elimination has been playing
tricks on me (one drive this time and another drive next time).
Any suggestions appreciated.
_____________________________________________________________________
/ Brian C. Hill bchill_at_bch.net *82 (530) 753-0358 \
| Systems Programmer University of California, Davis |
| Unix Specialist BCH Technical Services |
Received on Tue Jan 20 1998 - 06:14:15 NZDT