"aborting sbp2 command"

Good day, everyone,

I'm having a problem both reading and writing to my external
harddrive/enclosure over its firewire interface. In particular, I get
consistent read and write aborts which interrupt the data streams and
significantly slow down throughput.

Here's the setup. The host is a Dell Inspiron 8200 laptop with onboard
ethernet, firewire (4-pin), usb, etc. The enclosure is an Inclose
HD-337-FW/U2 holding a Western Digital WD2000JDRTL 200G drive. I've
experimented with both the most recent stable Linux kernel (2.4.22) and
development kernel (2.6.0-test9), and I seem to encounter the same
problem. Whenever I read from or write to the drive, it frequently
hangs, eventually spitting out one of the following messages to
/var/log/syslog before continuing:

    Oct 31 18:41:47 host kernel: ieee1394: sbp2: aborting sbp2 command
    Oct 31 18:41:47 host kernel: Read (10) 00 13 f2 6a e3 00 00 70 00

    or

    Oct 31 19:03:15 host kernel: ieee1394: sbp2: aborting sbp2 command
    Oct 31 19:03:15 host kernel: Write (10) 00 00 01 01 3f 00 00 08 00

respectively. My /proc/scsi/scsi looks like:

    Attached devices:
    Host: scsi1 Channel: 00 Id: 00 Lun: 00
        Vendor: WDC WD20 Model: 00JB-32EVA0 Rev: 0.01
        Type: Direct-Access ANSI SCSI revision: 02

I've read on the archives that there may be an interrupt problem; my
/proc/interrupts looks like:

               CPU0
      0: 15034110 XT-PIC timer
      1: 20260 XT-PIC i8042
      2: 0 XT-PIC cascade
      8: 5 XT-PIC rtc
      9: 882 XT-PIC acpi
     11: 1278630 XT-PIC Intel 82801CA-ICH3, yenta, yenta, uhci_hcd, uhci_hcd, nvidia, ohci1394, eth0
     12: 55983 XT-PIC i8042
     14: 236887 XT-PIC ide0
    NMI: 0
    ERR: 7

So it looks like my ethernet card, my video card, and the firewire
enclosure are all using the same interrupt. Could this be causing the
problem?

Suggestions? Requests for additional information? Those aborts aren't
causing data loss, are they?

Thanks,

    John L. Clark

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