SCSI DVD-ROM problems

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Hi
I recently applied patch 118844-27. All went well except that now when I boot I get a load of SCSI errors (bus timeout etc etc. etc.), which prevents the system from starting (well, I've never waited long enough to see if it gets past all of the timeouts, but it seems to be timing out on all devices).
If I unplug my Toshiba SD-M1201 DVD_ROM then I can boot normally. The same PC has worked OK for a good few years, going back to Solaris 7. This looks like a regression to me.
Any ideas for a workaround, or is there going to be a patch to fix this?
A+
Paul
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Replay

No replies, but I can add a little.
If I leave the DVD plugged in, but disable it in the SCSI BIOS, then I can use it (with the /dev entries that were created prior to 118844-27). So the problem seems to be limited to newboot and the detection of hardware, not to anything more fundamentally related to the SCSI layers.
Paul