Date: Tue, 22 Apr 1997 15:23:40 -0700 (PDT) From: "Brian N. Handy" <handy@sag.space.lockheed.com> To: freebsd-scsi@freebsd.org Subject: AHA-1542 woes Message-ID: <Pine.OSF.3.96.970422151706.5485J-100000@sag.space.lockheed.com>
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Hi, I'm having problems with a SCSI tape drive on a 486. First off: FreeBSD flare.physics.montana.edu 2.2-STABLE FreeBSD 2.2-STABLE #0: Tue Apr 22 13:16:15 MDT 1997 handy@flare.physics.montana.edu:/usr/src/sys/compile/FLARE i386 ...It's a newly CVSupped machine, and I did a "make world" last night and recompiled the kernel this morning. What this machine is largely used for is to pull data off Exabyte tapes and then archive it onto CDrom. Prior to a few days ago, the machine ran some odd 2.2-SNAP from middle of last year or so. The relevant probe messages: [...] aha0 at 0x330-0x333 irq 11 drq 5 on isa aha0 waiting for scsi devices to settle (aha0:0:0): "Quantum XP34300 L912" type 0 fixed SCSI 2 sd0(aha0:0:0): Direct-Access 4101MB (8399520 512 byte sectors) (aha0:2:0): "PHILIPS CDD2600 1.07" type 5 removable SCSI 2 worm0(aha0:2:0): Write-Once (aha0:3:0): "EXABYTE EXB-85058SQANXR1 07J0" type 1 removable SCSI 2 st0(aha0:3:0): Sequential-Access density code 0x0, drive empty scd0 not found at 0x230 [...] The CD-writer works great, and the disk drive works great. This machine used to be an IDE machine, I went to SCSI so I could use the tape drive and CD writer. What happens is while I'm reading tar stuff from the tape drive, the SCSI bus seems to freeeze up. The relevant messages: Apr 22 15:02:55 flare /kernel: sd0(aha0:0:0): timed out Apr 22 15:02:55 flare /kernel: adapter not taking commands.. frozen?! Apr 22 15:02:55 flare /kernel: Apr 22 15:02:59 flare /kernel: sd0(aha0:0:0): timed out Apr 22 15:02:59 flare /kernel: adapter not taking commands.. frozen?! Apr 22 15:02:59 flare /kernel: AGAIN Apr 22 15:02:59 flare /kernel: aha0: MBO 02 and not 00 (free) Apr 22 15:03:09 flare /kernel: sd0(aha0:0:0): timed out Apr 22 15:03:09 flare /kernel: adapter not taking commands.. frozen?! [....] This repeats over and over for a while, and the machine is effectively locked up now. Later, when I try to do, say, a "du" on the SCSI disk I continue getting this sort of stuff -- which I think means the SCSI adapter is hosed here on out. I have to do a hard reboot to get the system back. Nothing else seems to jam the system up solidly like this. The CD writer and disk drive work fine all the time. Any suggestions for what I can try to fix this? Thanks, Brian
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