Thanks again to sun-managers; you always come through when the vendors
don't. The original problem was SCSI bus resets on a 4/370 with 4 Maxtor
P-12 drives attached. Thanks to everyone. Suggestions came from:
>I don't know if this is your problem, but I had two Maxtor 1.0 GB
>drives fail in 4 months, then FINALLY the vendor informed me that the
>firmware on the disks was faulty. Seems the read-ahead cache causes
>various, intermittent errors/failures. I have some software that will
>determine the Rev # of the firmware and check to see if the read-ahead
>cache is turned on. Let me know if you would like me to email it to
>you. Unless you bought the drives VERY recently, I would bet this is
The drives are current; Danielle sent me the software and I was able to
determine that the firmware is current. But the software is very useful in
determining the status of the read-ahead cache. Thanks much, Danielle.
>Is there anything else on the SCSI bus besides the Maxtor drives? (Try
>a probe-scsi if the 4/370's ROM supports it.) I have seen stuff like
>this when trying to mix Adaptec- and Emulex-based shoeboxes on a sun-3
>under SunOS 3.5 .
Just the 4 Maxtor drives were on the bus, but we're getting warmer...
>anyway, the terminations should be at the ends of the bus.
>sm0 perhaps has one? phys sd2 should have it instead...
>sd3 should (and does, according to your note) have the other.
The wiring scheme on the 4/370 is strange; because of the peripherial
trays, it's hard to trace how the wiring goes. Sun verified that my
terminations were correct.
>The only odd thing I can see is that the snapshots refer to lun 1 all the
>time, and I take it that the drives are embedded SCSI (I don't know the
>drive designator off hand), so there are no LUN 1's at all, they're all 0.
>Is there anything running that's trying to access sd1/3/5 etc? I would be
>inclined to drop those lines from the kernel (you'll never use them) to
>avoid any abberant program trying to get at non-existent hardware.
Bingo! Although the only 4 devices on the bus were the Maxtor drives, the
kernel configuration defined additional devices on LUN 1. When I commented
out the additional devices, the symptoms disappeared.
So, the moral of the story is, if you don't need it, take it out of the
Thanks again, everyone.
-- --------------------------------------------------------------- Jeff Pack UUCP: ...!uunet!inel.gov!jfp Idaho National Engineering Lab Internet: email@example.com P. O. Box 1625 M.S. 2603 Phone: (208) 526-0007 Idaho Falls, ID 83415 FAX: (208) 526-9936
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