Re: VAXstation 4000/90 SCSI weirdness on 10 RC5

On Fri, 2024-03-22 16:57:12 +0100, Hans Rosenfeld <[email protected]> wrote:
> I wanted to create a backup of my VS 4k90 root disk, and I ran into a
> whole lot of SCSI weirdness like I've never seen before. I got three IBM
> DNES-318350 disks out of storage in th hope that at least one would
> work, but that seems not to be the case.
> 
> The issues start with SCSI timeouts before the disks are even attached:
> 
> [     3.539508] (asc0:2:0): selection failed; 11 left in FIFO [intr 18, stat 93, step 3]
> [    13.539441] probe(asc0:0:2:0): asc0: timed out [ecb 0x87ec1fa8 (flags 0x1, dleft 10, stat 0)], <state 2, nexus 0x87ec1fa8, phase(l 13, c 3, p 3), resid 0, msg(q 20,o 80) >
> [    15.549440] probe(asc0:0:2:0): asc0: timed out [ecb 0x87ec1fa8 (flags 0x41, dleft 10, stat 0)], <state 2, nexus 0x87ec1fa8, phase(l 13, c 3, p 3), resid 0, msg(q 20,o 80) > AGAIN
> [    15.579450] (asc0:2:0): selection failed; 11 left in FIFO [intr 18, stat 93, step 3]
> [    16.579446] probe(asc0:0:2:0): asc0: timed out [ecb 0x87ec1fa8 (flags 0x1, dleft 4000, stat 0)], <state 2, nexus 0x87ec1fa8, phase(l 13, c 3, p 3), resid 0, msg(q 20,o 80) >
> [    18.589440] probe(asc0:0:2:0): asc0: timed out [ecb 0x87ec1fa8 (flags 0x41, dleft 4000, stat 0)], <state 2, nexus 0x87ec1fa8, phase(l 13, c 3, p 3), resid 0, msg(q 20,o 80) > AGAIN
> [    18.605122] probe(asc0:0:2:0): async, 8-bit transfers
> 
> But eventually, the disk attaches:
> 
> [    18.612879] sd1 at scsibus0 target 2 lun 0: <IBM, DNES-318350, SA30> disk fixed
> [    19.499438] sd1: 17501 MB, 11474 cyl, 10 head, 312 sec, 512 bytes/sect x 35843670 sectors
> [    19.519502] sd1: sync (160.00ns offset 15), 8-bit (6.250MB/s) transfers, tagged queueing

I have vague memories that Maciej had similar SCSI issues with some
system that he could track down to a bad memory chip.

MfG, JBG

--

-----BEGIN PGP SIGNATURE-----

iF0EABECAB0WIQQlDTvPcScNjKREqWEdvV51g5nhuwUCZf21FQAKCRAdvV51g5nh
u9lmAJ4s4ryu20/NSK6T8A4K0PIG0qB6egCfTL9WiFgcBfVw50t074GdxHneyDc=
=R5sh
-----END PGP SIGNATURE-----