Bug 99001 - Device or resource busy. Cannot open '/dev/sg0'. Cannot open SCSI driver.
Device or resource busy. Cannot open '/dev/sg0'. Cannot open SCSI driver.
Product: Red Hat Linux
Classification: Retired
Component: cdrecord (Show other bugs)
athlon Linux
medium Severity medium
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Assigned To: Harald Hoyer
David Lawrence
Depends On:
  Show dependency treegraph
Reported: 2003-07-11 11:50 EDT by James Shanks
Modified: 2007-04-18 12:55 EDT (History)
2 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2004-06-04 06:04:07 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Screendump of up2date and cdrecord output (85.25 KB, image/png)
2003-08-18 09:44 EDT, James Shanks
no flags Details

  None (edit)
Description James Shanks 2003-07-11 11:50:16 EDT
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20030225

Description of problem:
I first tried this with cdrecord-2.0-6, but after reading the bug reports I
upgraded to the latest rawhide version, but still have the problem.

cdrecord -scanbus produces the following error:

Cdrecord 2.0 (i686-pc-linux-gnu) Copyright (C) 1995-2002 J?rg Schilling
cdrecord: Device or resource busy. Cannot open '/dev/sg0'. Cannot open SCSI driver.
cdrecord: For possible targets try 'cdrecord -scanbus'. Make sure you are root.
cdrecord: For possible transport specifiers try 'cdrecord dev=help'.

Displaying /etc/hwconf reveals the following:

class: CDROM
bus: SCSI
detached: 0
device: scd0
driver: ignore
desc: "  atapi 12X DVD-ROM"
host: 1
id: 0
channel: 0
lun: 0
generic: sg1
class: CDROM
bus: SCSI
detached: 0
device: scd1
driver: ignore
desc: "Yamaha CRW2100E"
host: 1
id: 1
channel: 0
lun: 0
generic: sg2
class: TAPE
bus: SCSI
detached: 0
device: st
driver: ignore
desc: "Hp C1537A"
host: 0
id: 3
channel: 0
lun: 0
generic: sg0

It seems that cdrecord is having trouble getting past the tape drive, which is a
"real" SCSI device on an Adaptec controller.  The cd drives are both IDE
devices.  This wouldn't be a big problem except that some cd-rom burning front
ends try to detect the drives during startup (and crash).

Problem didn't show up on RH 7.3 or 8.0.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.  run cdrecord -scanbus

Actual Results:  Produces error above.

Expected Results:  Should find the cdrom drives as in version 7.3 and 8.0.

Additional info:

Yes, removing the tape drive does make it work, but not a very good solution.
Comment 1 David Lawrence 2003-08-15 15:20:14 EDT
Are you logged in as root when running the cdrecord -scanbus command? I get this
error also when logged in as a normal user.
Comment 2 James Shanks 2003-08-15 17:10:58 EDT
Yes this was tried as root.  I just tried it again as root to verify.
Comment 3 Harald Hoyer 2003-08-18 07:17:54 EDT
An errata has been issued which should help the problem described in this bug report. 
This report is therefore being closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files, please follow the link below. You may reopen 
this bug report if the solution does not work for you.

Comment 4 James Shanks 2003-08-18 09:44:23 EDT
Created attachment 93711 [details]
Screendump of up2date and cdrecord output
Comment 5 James Shanks 2003-08-18 09:45:18 EDT
I just applied the patches.  The problem has not changed.
The best way to test this is to install a tape drive on an Adapted controller in
a system running RH9.  I've tried it on two now and it fails on both.
Comment 6 Harald Hoyer 2003-08-18 11:55:59 EDT
ok, I believe you :)
Comment 7 Scot Huntsberry 2003-08-21 21:08:54 EDT
I too applied the updates and still have the problem with the CD hanging. 
Additionaly, my system seems slower in general.
Comment 8 Harald Hoyer 2003-08-22 05:25:36 EDT
then we should report these issues to the author of cdrecord, cause in the
up2date version there are no RH specific patches anymore..
Comment 9 Jim Shanks 2003-08-22 16:47:21 EDT
Maybe this should be listed as a kernel problem, and not a cdrecord problem.  
RH 7.3 and 8.0 worked just fine.
Comment 10 Harald Hoyer 2003-10-24 08:45:00 EDT
can you please retry with the newest rawhide versions?
Comment 11 Harald Hoyer 2004-06-04 06:04:07 EDT
ok, cannot fix this...
Reopen, if the problem is still existing in newer Fedora versions.

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