Red Hat Bugzilla – Bug 99268
tape drive not recognized when USB CDROM is plugged in at boot
Last modified: 2007-04-18 12:55:42 EDT
Description of problem:
I have a VXA-2 Exabyte Tape drive and a Iomega USB CDROM drive. The SCSI card
is Adaptec. The tape drive is internal and thus always connected to the SCSI
card. If I boot with the CDROM plugged in then /proc/scsi/scsi has only the
CDROM and no tape drive even though the tape was detected on boot. If I do an
mt -f /dev/st0 status then the tape drive is not recognized (no such device).
I issued the scsi add-single-device command but the /proc/scsi/scsi file was
unchanged. I issued the scsi remove-single-device command and the CDROM was
removed, but I still had no luck with the add-single-device for the tape drive.
If, however, I boot with the CDROM unplugged, then the /proc/scsi/scsi file
comes up empty. If I issue the mt status command right away then the tape
drive is enabled, associated with /dev/st0 and added to the /proc/scsi/scsi
file. I can even plug in the CDROM drive after that and it too will be enabled
and added to the /proc/scsi/scsi file. If I do things in this specific order
then I can have both devices.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. plug in CDROM
3. cat /proc/scsi/scsi and note CDROM only
4. mt -f /dev/st0 status and get error
5. echo 'scsi add-single-device 0 0 11 0'>/proc/scsi/scsi and notice that the
drive is not added
6. unplugg CDROM and reboot
7. cat /proc/scsi/scsi and not that the file does not exist
8. issue mt -f /dev/st0 and note the enabling messages and the association of
the drive to /dev/st0.
9. cat /proc/scsi/scsi and the tape drive is there
10. plug in the CDROM and watch it enable
11. cat /proc/scsi/scsi and not that both the tape drive and CDROM are there
Tape drive is not recognized when system is booted with USM CDROM plugged in
Boot should recognize both the CDROM and the tape drive
Accidently assigned to redhat-config-services.
What's the /proc/version for the kernel under test?
Please add the modprobe for the host adapter into /etc/rc.modules.
Sometimes hotplug won't lift scsi HBAs, and I don't remember how RHL 8
handled it. Let me know if that resolves the problem.