Cannot Unmount /dev/cd0
COSMO
Ron Sheridan wrote:
> I'm trying to determine why I cannot umount /dev/cd0. Its mounted over
> filesystem /cdrom and when I do an "unmount /cdrom", I get the message;
>
> unmount: 0506-349 Cannot unmount /dev/cd0: The requested resource is busy.
>
> Is there a way to determine what has the device busy? I'm on AIX 4.2.
> This has been a problem since a system crash and reboot with /cdrom mounted
> and the cd itself mounted in the drive. Is this the cause of the problem?
> I'm reasonably confident that there isn't anyone using it from the standpoint
> of them doing a cd /cdrom. It's an oracle install cd and that process is
> long past done. Can an unmount be forced??
>
> Thanks for any help!
>
> Ron
>
> r...@yuma.acns.colostate.edu
I have used "fuser" on filesystems to see what had a filesystem busy that kept it
from unmounting. I am not sure that fuser will work on /dev/cd0 though.
Ron Sheridan
Thanks for the responses! fuser did not show anything using the device.
However, after getting an update of lsof so it once again works, it showed
the culprit process and I can deal with it accordingly.
Ron
Michael Farmer
Just a thought, but is it possible that one of the Oracle processes is
running from the CD instead of the hard disk(s)?
Mike Farmer
mw...@msn.com
Ron Sheridan wrote in message <68u8js$3f...@yuma.ACNS.ColoState.EDU>...
Daniel E Whicker
Michael Farmer (mw...@email.msn.com) wrote:
: Just a thought, but is it possible that one of the Oracle processes is
: Mike Farmer
: mw...@msn.com
# fuser -u /cdrom
and
# fuser -uk /cdrom
Kevin Gee
You'd best use fuser on the device (/dev/cd0). As used here, fuser
would only check on activity in the /cdrom directory, not in any
subdirectories. Even better: get lsof and run it against the device.
--
Kevin Gee | CS Grad. Student - Univ. of Texas at Arlington
ge...@cse.uta.edu | Team Lead, AIX Supportline - IBM
IBM and UTA are not responsible for my opinions.
Steffen Mehlig
r...@yuma.ACNS.ColoState.EDU (Ron Sheridan ) have write on the 06.01.98
in /COMP/UNIX/AIX to the theme: Cannot Unmount /dev/cd0:
> I'm trying to determine why I cannot umount /dev/cd0. Its mounted over
> filesystem /cdrom and when I do an "unmount /cdrom", I get the message;
>
> unmount: 0506-349 Cannot unmount /dev/cd0: The requested resource is
> busy.
>
> Is there a way to determine what has the device busy? I'm on AIX 4.2.
> This has been a problem since a system crash and reboot with /cdrom
> mounted and the cd itself mounted in the drive. Is this the cause of the
> problem? I'm reasonably confident that there isn't anyone using it from
> the standpoint of them doing a cd /cdrom. It's an oracle install cd and
> that process is long past done. Can an unmount be forced??
>
> Thanks for any help!
>
> Ron
I have had the same problem. Then, I have use Smitty for mounting, with
the options for removable drive (And, I think, set for softmount) .You can
look also with key F6, what Smitty used for a command . Unfortunately, I'm
now at home and not on my AIX box in the firm, where I can looking for the
right command line. I have had never problems with umount, the cd drive.
Hope, this helps, Steffen
--
E-Mail : ste...@paradise.sachsen.hexe.de
CB-Packet-Radio-Net : SM1WBL@FH0BOX.#DD.SAX.DEU.EU
Have a good time .....
Fabrice Gonton
STE...@PARADISE.sachsen.hexe.de (Steffen Mehlig) writes:
> I'm trying to determine why I cannot umount /dev/cd0. Its mounted over
> filesystem /cdrom and when I do an "unmount /cdrom", I get the message;
>
> unmount: 0506-349 Cannot unmount /dev/cd0: The requested resource is
> busy.
>
> Is there a way to determine what has the device busy? I'm on AIX 4.2.
> This has been a problem since a system crash and reboot with /cdrom
> mounted and the cd itself mounted in the drive. Is this the cause of the
> problem? I'm reasonably confident that there isn't anyone using it from
> the standpoint of them doing a cd /cdrom. It's an oracle install cd and
> that process is long past done. Can an unmount be forced??
First, try umount -f
But :
You cannot use the umount command on a device in use, as the man says.
You can use lsof to determine the guilty process(es) using /dev/cd0
ressource
--
Fabrice
All opinions expressed here are mine ...
Walter Harms
STE...@PARADISE.sachsen.hexe.de (Steffen Mehlig) writes:
>r...@yuma.ACNS.ColoState.EDU (Ron Sheridan ) have write on the 06.01.98
>in /COMP/UNIX/AIX to the theme: Cannot Unmount /dev/cd0:
>> I'm trying to determine why I cannot umount /dev/cd0. Its mounted over
>> filesystem /cdrom and when I do an "unmount /cdrom", I get the message;
>>
>> unmount: 0506-349 Cannot unmount /dev/cd0: The requested resource is
>> busy.
>>
>> Is there a way to determine what has the device busy? I'm on AIX 4.2.
>> This has been a problem since a system crash and reboot with /cdrom
>> mounted and the cd itself mounted in the drive. Is this the cause of the
>> problem? I'm reasonably confident that there isn't anyone using it from
>> the standpoint of them doing a cd /cdrom. It's an oracle install cd and
>> that process is long past done. Can an unmount be forced??
>>
>> Thanks for any help!
>>
>> Ron
>I have had the same problem. Then, I have use Smitty for mounting, with
>the options for removable drive (And, I think, set for softmount) .You can
>look also with key F6, what Smitty used for a command . Unfortunately, I'm
>now at home and not on my AIX box in the firm, where I can looking for the
>right command line. I have had never problems with umount, the cd drive.
the problem occurs if someone is still using /cdrom.
to mount a cd use
mount -rv cdrfs /dev/cd0 /mnt
and check whats going on. normaly you can umount via:
umount /mnt
walter
>--
> E-Mail : ste...@paradise.sachsen.hexe.de
> CB-Packet-Radio-Net : SM1WBL@FH0BOX.#DD.SAX.DEU.EU
> Have a good time .....
--
-----
"Work for? I don't work for anybody. I'm just having fun!"
-----
Richard Ataman
Fabrice Gonton wrote:
>
> STE...@PARADISE.sachsen.hexe.de (Steffen Mehlig) writes:
>
> > I'm trying to determine why I cannot umount /dev/cd0. Its mounted over
> > filesystem /cdrom and when I do an "unmount /cdrom", I get the message;
> >
> > unmount: 0506-349 Cannot unmount /dev/cd0: The requested resource is
> > busy.
> >
> > Is there a way to determine what has the device busy? I'm on AIX 4.2.
> > This has been a problem since a system crash and reboot with /cdrom
> > mounted and the cd itself mounted in the drive. Is this the cause of the
> > problem? I'm reasonably confident that there isn't anyone using it from
> > the standpoint of them doing a cd /cdrom. It's an oracle install cd and
> > that process is long past done. Can an unmount be forced??
>
> But :
> You cannot use the umount command on a device in use, as the man says.
> You can use lsof to determine the guilty process(es) using /dev/cd0
> ressource
>
> --
> Fabrice
> All opinions expressed here are mine ...
same problem because they had a shell open on that filesystem!
Jim Lane
i have used LSOF to solve this exact problem. works just fine.
Jim Lane
Systems Programmer
Toronto Hydro
On Wed, 07 Jan 1998 00:47:01 -0700, COSMO <cos...@ibm.net> wrote:
>
>
>Ron Sheridan wrote:
>
>> I'm trying to determine why I cannot umount /dev/cd0. Its mounted over
>> filesystem /cdrom and when I do an "unmount /cdrom", I get the message;
>>
>> unmount: 0506-349 Cannot unmount /dev/cd0: The requested resource is busy.
>>
>> Is there a way to determine what has the device busy? I'm on AIX 4.2.
>> This has been a problem since a system crash and reboot with /cdrom mounted
>> and the cd itself mounted in the drive. Is this the cause of the problem?
>> I'm reasonably confident that there isn't anyone using it from the standpoint
>> of them doing a cd /cdrom. It's an oracle install cd and that process is
>> long past done. Can an unmount be forced??
>>
>> Thanks for any help!
>>
>> Ron
>>