Re: [CentOS] umount problem
On Tue, Oct 07, 2014 at 08:09:14PM -0700, John R Pierce wrote: On 10/7/2014 5:54 PM, Fred Smith wrote: ...probably left some jbd2 thread hanging loose... one of the googled articles on jdb2 errors that I read suggested there have been kernel bugs which caused the journal writer to go nuts and constantly write stuff. that article was on an archlinux forum, and I didn't bother to read up on what kernel versions were affected. thanks, John! saw that one, but didn't read it, AFAICT it wasn't doing that, but merely wouldn't let go of the drive -- Fred Smith -- fre...@fcshome.stoneham.ma.us - The Lord detests the way of the wicked but he loves those who pursue righteousness. - Proverbs 15:9 (niv) - ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] umount problem
On 10/7/2014 3:13 PM, Fred Smith wrote: I've got a usb HD mounted, and it has been mounted since the weekend, and has been kept busy during that period. now Im done with it an want to umount it, but neither umount nor the on-screen icon (when right-clicked) will let me do it: it is /dev/sdd1, mounted as /media/seagateusb. when root tries to umount it we get this: # umount /media/seagateusb umount: /media/seagateusb: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) lsof | grep sdd1 gives this: $ lsof | grep sdd1 jbd2/sdd1 26358 root cwd DIR 253,1 4096 2 / jbd2/sdd1 26358 root rtd DIR 253,1 4096 2 / jbd2/sdd1 26358 root txt unknown /proc/26358/exe whats process 26358? ps -fwp 26358 will show you this... -- john r pierce 37N 122W somewhere on the middle of the left coast ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] umount problem
Fred Smith wrote: I've got a usb HD mounted, and it has been mounted since the weekend, and has been kept busy during that period. now Im done with it an want to umount it, but neither umount nor the on-screen icon (when right-clicked) will let me do it: it is /dev/sdd1, mounted as /media/seagateusb. when root tries to umount it we get this: snip It's under control of autofs. You can open the GUI file manager, and do a safely remove/eject. Or you can stop autofs for a minute, and then umount it. mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] umount problem
On Tue, Oct 07, 2014 at 03:18:37PM -0700, John R Pierce wrote: On 10/7/2014 3:13 PM, Fred Smith wrote: I've got a usb HD mounted, and it has been mounted since the weekend, and has been kept busy during that period. now Im done with it an want to umount it, but neither umount nor the on-screen icon (when right-clicked) will let me do it: it is /dev/sdd1, mounted as /media/seagateusb. when root tries to umount it we get this: # umount /media/seagateusb umount: /media/seagateusb: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) lsof | grep sdd1 gives this: $ lsof | grep sdd1 jbd2/sdd1 26358 root cwd DIR 253,1 4096 2 / jbd2/sdd1 26358 root rtd DIR 253,1 4096 2 / jbd2/sdd1 26358 root txt unknown /proc/26358/exe whats process 26358? ps -fwp 26358 will show you this... here's the result of your PS command, but I personally do not find it to be the least bit enlightening. perhaps you will...: # ps -fwp 26358 UIDPID PPID C STIME TTY TIME CMD root 26358 2 0 Oct04 ?00:01:14 [jbd2/sdd1-8] -- Fred Smith -- fre...@fcshome.stoneham.ma.us - I can do all things through Christ who strengthens me. -- Philippians 4:13 --- ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] umount problem
On Tue, Oct 07, 2014 at 06:19:00PM -0400, m.r...@5-cent.us wrote: Fred Smith wrote: I've got a usb HD mounted, and it has been mounted since the weekend, and has been kept busy during that period. now Im done with it an want to umount it, but neither umount nor the on-screen icon (when right-clicked) will let me do it: it is /dev/sdd1, mounted as /media/seagateusb. when root tries to umount it we get this: snip It's under control of autofs. You can open the GUI file manager, and do a safely remove/eject. Or you can stop autofs for a minute, and then umount it. actually, no I can't. if I right-click on seagateusb and click unmount, I get an error box saying Unable to unmount seagateusb. Cannot unmount because file system on device is busy. OTOH, if I choose safely remove drive instad, I get Unable to stop drive. This file cannot be stopped. I've killed all the shells and in fact all the interactive processes then logged off and on, so I'm pretty sure it's nothing I ran that is got a hold on the device. I hate to use the three-finger-salue from Windows, just to fix a piddly little problem like this :) -- Fred Smith -- fre...@fcshome.stoneham.ma.us - The Lord is like a strong tower. Those who do what is right can run to him for safety. --- Proverbs 18:10 (niv) - ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] umount problem
Fred Smith wrote: On Tue, Oct 07, 2014 at 06:19:00PM -0400, m.r...@5-cent.us wrote: Fred Smith wrote: I've got a usb HD mounted, and it has been mounted since the weekend, and has been kept busy during that period. now Im done with it an want to umount it, but neither umount nor the on-screen icon (when right-clicked) will let me do it: it is /dev/sdd1, mounted as /media/seagateusb. when root tries to umount it we get this: snip It's under control of autofs. You can open the GUI file manager, and do a safely remove/eject. Or you can stop autofs for a minute, and then umount it. actually, no I can't. if I right-click on seagateusb and click unmount, I get an error box saying Unable to unmount seagateusb. Cannot unmount because file system on device is busy. snip Ok, try lsof /media/seagateusb - that may tell you what's holding it. Did you try service autofs stop? mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] umount problem
On 10/7/2014 3:29 PM, Fred Smith wrote: here's the result of your PS command, but I personally do not find it to be the least bit enlightening. perhaps you will...: # ps -fwp 26358 UIDPID PPID C STIME TTY TIME CMD root 26358 2 0 Oct04 ?00:01:14 [jbd2/sdd1-8] processes in [] are system processes or kernel threads, I believe. not sure what the significance of jbd2 is hmm, google suggests its the journaling block device, used for journaled versions of extfs (ext3, ext4) ? http://en.wikipedia.org/wiki/Journaling_block_device -- john r pierce 37N 122W somewhere on the middle of the left coast ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] umount problem
On Tue, Oct 07, 2014 at 06:46:17PM -0400, m.r...@5-cent.us wrote: Fred Smith wrote: On Tue, Oct 07, 2014 at 06:19:00PM -0400, m.r...@5-cent.us wrote: Fred Smith wrote: I've got a usb HD mounted, and it has been mounted since the weekend, and has been kept busy during that period. now Im done with it an want to umount it, but neither umount nor the on-screen icon (when right-clicked) will let me do it: it is /dev/sdd1, mounted as /media/seagateusb. when root tries to umount it we get this: snip It's under control of autofs. You can open the GUI file manager, and do a safely remove/eject. Or you can stop autofs for a minute, and then umount it. actually, no I can't. if I right-click on seagateusb and click unmount, I get an error box saying Unable to unmount seagateusb. Cannot unmount because file system on device is busy. snip Ok, try lsof /media/seagateusb - that may tell you what's holding it. Did you try service autofs stop? yes, made no difference. another responder suggests it is journalling block device daemon/ thread/whatever holding the device. looking into that as we speak Fred -- Fred Smith -- fre...@fcshome.stoneham.ma.us - And he will be called Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace. Of the increase of his government there will be no end. He will reign on David's throne and over his kingdom, establishing and upholding it with justice and righteousness from that time on and forever. --- Isaiah 9:7 (niv) -- ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] umount problem
On Tue, Oct 07, 2014 at 07:37:25PM -0400, Fred Smith wrote: On Tue, Oct 07, 2014 at 06:46:17PM -0400, m.r...@5-cent.us wrote: Fred Smith wrote: On Tue, Oct 07, 2014 at 06:19:00PM -0400, m.r...@5-cent.us wrote: Fred Smith wrote: I've got a usb HD mounted, and it has been mounted since the weekend, and has been kept busy during that period. now Im done with it an want to umount it, but neither umount nor the on-screen icon (when right-clicked) will let me do it: it is /dev/sdd1, mounted as /media/seagateusb. when root tries to umount it we get this: snip It's under control of autofs. You can open the GUI file manager, and do a safely remove/eject. Or you can stop autofs for a minute, and then umount it. actually, no I can't. if I right-click on seagateusb and click unmount, I get an error box saying Unable to unmount seagateusb. Cannot unmount because file system on device is busy. snip Ok, try lsof /media/seagateusb - that may tell you what's holding it. Did you try service autofs stop? yes, made no difference. another responder suggests it is journalling block device daemon/ thread/whatever holding the device. looking into that as we speak Got tired of fooling with it and did a umount -l which immediately released the drive. probably left some jbd2 thread hanging loose, but at this point Im not too concerned. thanks for the suggestions! -- Fred Smith -- fre...@fcshome.stoneham.ma.us - But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. --- Romans 5:8 (niv) -- ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] umount problem
On 10/7/2014 5:54 PM, Fred Smith wrote: ...probably left some jbd2 thread hanging loose... one of the googled articles on jdb2 errors that I read suggested there have been kernel bugs which caused the journal writer to go nuts and constantly write stuff. that article was on an archlinux forum, and I didn't bother to read up on what kernel versions were affected. -- john r pierce 37N 122W somewhere on the middle of the left coast ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
