Subject: Re: sd2(ncr0:6:0): command aborted... ?
To: None <firstname.lastname@example.org>
From: Charles M. Hannum <email@example.com>
Date: 06/15/1995 09:42:14
ncr0 targ 6 lun 0: <MICROP, 1936-21MW1002004, HW0A> SCSI2 0/direct fixed
sd2 at scsibus0sd2(ncr0:6:0): asynchronous.
sd2(ncr0:6:0): command aborted, data = 00 00 00 00 49 00 00 00 00 00
: drive offline
According to the SCSI spec, that's:
49 00 DTLPWRSOMC INVALID MESSAGE ERROR
That's probably a bogus response to a sync negotiation request. (SCSI
2 drives should be using MESSAGE MESSAGE REJECT.) In
/sys/scsi/scsi_base.c, you could try:
case 0x8: /* BLANK CHECK */
error = 0;
+ case 0xb: /* COMMAND ABORTED */
+ return ERESTART;
case 0xd: /* VOLUME OVERFLOW */
error = ENOSPC;
That will cause it to retry on a COMMAND ABORTED sense key, rather
than failing on the first try.
>From that time syslog seems to have logged this before it crashed
Jun 13 21:52:29 hauki /netbsd: sd2(ncr0:6:0): DELAYED ERROR, key = 0x3
Jun 13 21:52:29 hauki /netbsd: sd2(ncr0:6:0): medium error, info =
-860574551 (decimal), data = 00 00 00 00 12 00 00 20 10 00
12 00 D W O ADDRESS MARK NOT FOUND FOR ID FIELD
It presumably indicates that there is a bad spot on your disk,
probably noticed by the drive during write-behind, after it told you
the data was written.