2.4.22 - sbp2 not registering as a scsi device

Hi,

I'm trying to get a 200G LaCie harddrive and an iPod recognized by my linux
box. I'm running a 2.4.22 kernel, with the various 1394 related modules
(raw1394, ohci1394, sbp2). About a week ago, I had everything working pretty
well. The following steps would get me a /dev/sdb1 which I could mount with
no trouble:

 root# modprobe ohci1394
 root# modprobe raw1394
 root# modprobe sbp2
 root# sudo rescan-scsi-bus.sh

which, looking in the old /var/log/messages, gave something like this:

 ylem kernel: ohci1394: $Rev: 1010 $ Ben Collins <bcollins@debian.org>
 ylem kernel: ohci1394_0: OHCI-1394 1.0 (PCI): IRQ=[11] MMIO=[dd101000-dd1017ff] Max Packet=[2048]
 ylem kernel: raw1394: /dev/raw1394 device initialized
 ylem kernel: sbp2: $Rev: 1010 $ Ben Collins <bcollins@debian.org>
 ylem kernel: scsi0 : SCSI emulation for IEEE-1394 SBP-2 Devices
 ylem kernel: ieee1394: sbp2: Logged into SBP-2 device
 ylem kernel: ieee1394: sbp2: Logged into SBP-2 device
 ylem kernel: scsi singledevice 0 0 0 0
 ylem kernel: Vendor: Apple Model: iPod Rev: 1.24
 ylem kernel: Type: Direct-Access ANSI SCSI revision: 02
 ylem kernel: Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0
 ylem kernel: SCSI device sda: 39062520 512-byte hdwr sectors (20000 MB)
 ylem kernel: sda: test WP failed, assume Write Enabled
 ylem kernel: sda: sda1 sda2
 ylem kernel: scsi singledevice 0 0 1 0
 ylem kernel: Vendor: WDC WD20 Model: 00BB-00DAA3 Rev: 75.1
 ylem kernel: Type: Direct-Access ANSI SCSI revision: 06
 ylem kernel: Attached scsi disk sdb at scsi0, channel 0, id 1, lun 0
 ylem kernel: SCSI device sdb: 390721968 512-byte hdwr sectors (200050 MB)
 ylem kernel: sdb: sdb1
 ylem kernel: scsi singledevice 0 0 2 0
 ylem kernel: scsi singledevice 0 0 3 0
 ylem kernel: scsi singledevice 0 0 4 0
 ylem kernel: scsi singledevice 0 0 5 0
 ylem kernel: scsi singledevice 0 0 6 0
 ylem kernel: scsi singledevice 0 0 7 0

You can see in this output the iPod that proved to be my undoing, because I
didn't have FAT support in the kernel. So I recompiled, adding FAT support
but potentially changing other settings as well (a bad habit, I know), and
now things don't work anymore (Sadly, I don't source-control my kernel
.config, so I can't just revert):

 root# modprobe ohci1394
 root# modprobe raw1394
 root# modprobe sbp2
 root# sudo rescan-scsi-bus.sh

 ylem kernel: ohci1394: $Rev: 1010 $ Ben Collins <bcollins@debian.org>
 ylem kernel: ohci1394_0: OHCI-1394 1.0 (PCI): IRQ=[11] MMIO=[dd101000-dd1017ff] Max Packet=[2048]
 ylem kernel: raw1394: /dev/raw1394 device initialized
 ylem kernel: sbp2: $Rev: 1010 $ Ben Collins <bcollins@debian.org>
 ylem kernel: scsi singledevice 0 0 0 0
 ylem kernel: scsi singledevice 0 0 0 1
 ylem kernel: scsi singledevice 0 0 0 2
 ylem kernel: scsi singledevice 0 0 0 3
 ylem kernel: scsi singledevice 0 0 0 4
 ylem kernel: scsi singledevice 0 0 0 5
 ylem kernel: scsi singledevice 0 0 0 6
 ylem kernel: scsi singledevice 0 0 0 7

The first place where these two diverge is the line
 ylem kernel: scsi0 : SCSI emulation for IEEE-1394 SBP-2 Devices
which no longer appears. Also, after opening up rescan-scsi-bus.sh to see what
it was doing, I took a look for any adapters under /proc/scsi, and there's no
/proc/scsi/sbp2 there now.

I looked though the kernel source
 $ grep -nr 'SCSI emulation for IEEE-1394 SBP-2 Devices' /usr/src/linux
 /usr/src/linux/drivers/ieee1394/sbp2.c:2886: return "SCSI emulation for IEEE-1394 SBP-2 Devices";
but that's as far as I got. It seems like the SBP2 is no longer being loaded as a SCSI
adapter, but I have no idea why.

There's another report of this problem on the list,
 Subject: 2.6.0-test2 - sbp2 not registering as a scsi device
 (http://sourceforge.net/mailarchive/forum.php?thread_id=2858993&forum_id=5387)
but there've been no responses to it, so I though I'd try to raise it again.

Thanks for any help, either solutions or next steps for diagosing.

Brady

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Received on Sun Oct 19 19:23:39 2003