Re: can't umount /usr(/dev/hdb3)
> The other asnwers in this list are all very usefull, but sometimes > I find that whatever I do, I cannot unmount for example /usr. > In such cases, it's best to do > > mount -o remount,ro /usr > > i.e. remount it read-only, so that all data is written do the partition, > and you can now safely switch off the computer (execute "halt"). > (assuming all other partions are unmonuted properly). > I've been having trouble with hardware errors on one disk drive causing a filesystem panic that appears to force the filesystem into read-only mode but the processes accessing it are blocked and won't die from signals. I would like to be able to force a reboot remotely when this happens but even 'reboot -f' hangs. Is there some other way besides punching the reset button to make the machine restart? Les Mikesell [EMAIL PROTECTED] -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: can't umount /usr(/dev/hdb3)
> >The other asnwers in this list are all very usefull, but sometimes > >I find that whatever I do, I cannot unmount for example /usr. > >In such cases, it's best to do > > > > mount -o remount,ro /usr > > > >i.e. remount it read-only, so that all data is written do the partition, > >and you can now safely switch off the computer (execute "halt"). > >(assuming all other partions are unmonuted properly). > > Or better still, find what process is using /dev/hdb3 by doing this: > > fuser -uvm That is basically what the others suggested. But still, sumetimes I'm unable to kill -KILL those processes, or whatever. But thenagain, your -uvm options are quite nice, and seem to find more process than I'm used to. Thanks -- joost witteveen [EMAIL PROTECTED] I came, I saw, ..., well, it wasn't free so I left again. (LUA, 1988)
Fixed...Re: can't umount /usr(/dev/hdb3)
Hi all, On 30-Mar-97 Dale Scheetz wrote: >> If you are in any of the mounted directories (including the top, e.g. >> /mnt), then umount would give this message and refues to unmount the >> device. >> >I don't know that this is strictly true. For instance, my fstab mounts >/usr from a seperate device, and, I assume, unmounts it during shutdown. >At the time of shutdown, all my users are logged in and sitting in their >user accounts. Now, I know that shutdown kills all the users off before it >does the unmounts, so by then they are not an issue. I assume all root >processes are killed off by then as well. >I had a problem recently of this type. I tried to unmount /cdrom and was >told that /dev/scd0 was busy. After going to each account logged in and >checking for processes using /cdrom, and finding none, I eventually logged >out all users but root at VC1 and was still unable to unmount. Since I >REALLY wanted the cd that was in the drive, I shut the drive off and then >back on. This let the drive open it's door so I could retrieve the cd, but >created problems for the system (i/o errors from df) until I rebooted. >I have learned since that I could probably have 'rmmod'ed the driver and >re-'insmod'ed it, but still have no idea why the system thought that the >device was busy. > >Waiting is, The cause of my umount problem was bash-2.0-3_i386.deb. This problem was fixed when I downgraded it. Thanks everyone for your help, David
Re: can't umount /usr(/dev/hdb3)
At 12:44 AM 31/03/97 +0200, joost witteveen wrote: >> Hi all, >> >> I upgrade a lot of packages, don't know exactly which ones though, and now >> shutdown -h now and umount will not unmount /usr(aka /dev/hdb3). It gives me >> same error: >> umount: /dev/hdb3: device is busy >> >> Does anyone have any idea as to what is causing this? > >The other asnwers in this list are all very usefull, but sometimes >I find that whatever I do, I cannot unmount for example /usr. >In such cases, it's best to do > > mount -o remount,ro /usr > >i.e. remount it read-only, so that all data is written do the partition, >and you can now safely switch off the computer (execute "halt"). >(assuming all other partions are unmonuted properly). Or better still, find what process is using /dev/hdb3 by doing this: fuser -uvm What I mean by mounted system is /var or /home and the like. This will print out process ID and the USER who's controlling it (and what the process is - ie: named). Regards -- Karl Ferguson Tower Networking Pty Ltd Tel: +61-9-456- [EMAIL PROTECTED] t/a STAR Online Services Fax: +61-9-455-2776 [EMAIL PROTECTED]
Re: can't umount /usr(/dev/hdb3)
> Hi all, > > I upgrade a lot of packages, don't know exactly which ones though, and now > shutdown -h now and umount will not unmount /usr(aka /dev/hdb3). It gives me > same error: > umount: /dev/hdb3: device is busy > > Does anyone have any idea as to what is causing this? The other asnwers in this list are all very usefull, but sometimes I find that whatever I do, I cannot unmount for example /usr. In such cases, it's best to do mount -o remount,ro /usr i.e. remount it read-only, so that all data is written do the partition, and you can now safely switch off the computer (execute "halt"). (assuming all other partions are unmonuted properly). -- joost witteveen [EMAIL PROTECTED] I came, I saw, ..., well, it wasn't free so I left again. (LUA, 1988)
Re: can't umount /usr(/dev/hdb3)
On Sat, 29 Mar 1997, Syrus Nemat-Nasser wrote: > On Sat, 29 Mar 1997, David Puryear wrote: > > > I upgrade a lot of packages, don't know exactly which ones though, and now > > shutdown -h now and umount will not unmount /usr(aka /dev/hdb3). It gives me > > same error: > > umount: /dev/hdb3: device is busy > > > > Does anyone have any idea as to what is causing this? > > If you are in any of the mounted directories (including the top, e.g. > /mnt), then umount would give this message and refues to unmount the > device. > I don't know that this is strictly true. For instance, my fstab mounts /usr from a seperate device, and, I assume, unmounts it during shutdown. At the time of shutdown, all my users are logged in and sitting in their user accounts. Now, I know that shutdown kills all the users off before it does the unmounts, so by then they are not an issue. I assume all root processes are killed off by then as well. I had a problem recently of this type. I tried to unmount /cdrom and was told that /dev/scd0 was busy. After going to each account logged in and checking for processes using /cdrom, and finding none, I eventually logged out all users but root at VC1 and was still unable to unmount. Since I REALLY wanted the cd that was in the drive, I shut the drive off and then back on. This let the drive open it's door so I could retrieve the cd, but created problems for the system (i/o errors from df) until I rebooted. I have learned since that I could probably have 'rmmod'ed the driver and re-'insmod'ed it, but still have no idea why the system thought that the device was busy. Waiting is, Dwarf -- _-_-_-_-_-_- _-_-_-_-_-_-_- aka Dale Scheetz Phone: 1 (904) 656-9769 Flexible Software 11000 McCrackin Road e-mail: [EMAIL PROTECTED] Tallahassee, FL 32308 _-_-_-_-_-_- If you don't see what you want, just ask _-_-_-_-_-_-_-
Re: can't umount /usr(/dev/hdb3)
David Puryear <[EMAIL PROTECTED]> writes: > > Hi all, > > I upgrade a lot of packages, don't know exactly which ones though, and now > shutdown -h now and umount will not unmount /usr(aka /dev/hdb3). It gives me > same error: > umount: /dev/hdb3: device is busy > Try doing `fuser -m /usr', then you'll find out what process it is that's still using /usr (you probably want to put it into your /etc/init.d/halt script at an approprate point, then exit from the script to get more information). /etc/init.d/halt should send SIGTERM then SIGKILL to all processes before umounting filesystems, so it is strange that there is still a process that's alive. Hope that helps you work it out, Graeme -- | Graeme A Stewart, pgp public key finger [EMAIL PROTECTED]| | Key fingerprint = AF C7 BF A4 52 D5 3C 3B 17 A5 62 43 DA 15 E8 97 | | "Keep a good head, and always carry a lightbulb." Dylan |
Re: can't umount /usr(/dev/hdb3)
On Sat, 29 Mar 1997, David Puryear wrote: > I upgrade a lot of packages, don't know exactly which ones though, and now > shutdown -h now and umount will not unmount /usr(aka /dev/hdb3). It gives me > same error: > umount: /dev/hdb3: device is busy > > Does anyone have any idea as to what is causing this? If you are in any of the mounted directories (including the top, e.g. /mnt), then umount would give this message and refues to unmount the device. Syrus. -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Syrus Nemat-Nasser <[EMAIL PROTECTED]>UCSD Physics Dept.
can't umount /usr(/dev/hdb3)
Hi all, I upgrade a lot of packages, don't know exactly which ones though, and now shutdown -h now and umount will not unmount /usr(aka /dev/hdb3). It gives me same error: umount: /dev/hdb3: device is busy Does anyone have any idea as to what is causing this? Thanks, David p.s. From now on, I will upgrade only one package at a time than reboot to make sure nothing is broken.;-) and now shutdown -h now and umount will not umount /usr(aka /dev/hdb3). It gives me same error: umount: /dev/hdb3: device is busy Does anyone have any idea as to what is causing this?
