Messages in this thread |  | | Date | Fri, 6 Sep 1996 15:51:03 -0500 (CDT) | From | Jeff Haumont <> | Subject | 2.0.17 SCSI crash |
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Sadly, this will be a rather vague description of the problem, since my log files are kept on a SCSI drive and the kernel panic can't get written to disk in time.
The other day I was formatting a new ZIP disk with mke2fs and ran into a bad sector on the disk. The kernel promptly dumped out an Oops, complained a little about not receiving the number of bytes it was expecting, and then filled the screen with Aiee: scheduling in interrupt 0012475d (BTW: I did a 'disassemble 0x0012475d' and it is in wait_on_buffer)
I rebooted and tried mke2fs several times, and also tried 'dd if=/dev/zero of=/dev/sdb' but the same thing happened everytime.
I went back to 1.2.13 and tried the same thing. The kernel didn't panic, but instead did:
aha274x: target 5 underflow - wanted (at least) 28672, got 27648 aha274x: target 5 underflow - wanted (at least) 28672, got 27648 scsi0 : resetting for second half of retries. aha274x: attempting to reset scsi bus and card
1.2.13 never officially crashed, but was nearly unusable while it was trying to recover.
I then went to Windows and used the ZIP tools to format the disk. After that all problems vanished. Good news, but bad news for tracing down the problem, since I can no longer make it happen.
My SCSI ZIP drive is connected to a VLB Adaptec 2842 controller. I assume this is mostly the ZIP drives fault. It appears to do thing in a bit of a 'different' way. For example, it boots up like this:
AHA-2840 AT VLB SLOT 4: irq 11 bus release time 40 bclks data fifo threshold 100% SCSI CHANNEL A: scsi id 7 scsi selection timeout 256 ms scsi bus reset at power-on enabled scsi bus parity enabled scsi bus termination (low byte) enabled aic7xxx: Resetting the SCSI bus...done. scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 3.4/3.2/3.1 scsi : 1 host. scsi0: Target 0, channel A, now synchronous at 10.0MHz, offset 15. Vendor: IBM Model: DPES-31080 !t Rev: S31K Type: Direct-Access ANSI SCSI revision: 02 Detected scsi disk sda at scsi0, channel 0, id 0, lun 0 scsi0: Target 4, channel A, now synchronous at 5.0MHz, offset 15. Vendor: NEC Model: CD-ROM DRIVE:400 Rev: 1.0 Type: CD-ROM ANSI SCSI revision: 02 scsi0: Target 5, channel A, refusing synchronous negotiation; using asynchronous transfers. Vendor: IOMEGA Model: ZIP 100 Rev: N*32 Type: Direct-Access ANSI SCSI revision: 02
Thanks, Jeff Haumont (jhaumont@cse.unl.edu)
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