Kyle Thorne
2015-Mar-05 10:40 UTC
[CentOS] Cannot remount drive after lost iSCSI connection
Hi all, We've having an issue at the moment where an iSCSI connection was temporarily lost on a few VMs running CentOS 6 on ESXi. The problem is, now that the iSCSI connection has returned, we are not able to remount the drive. At first the drive is read-only, so I tried '*mount -o remount,rw*' which didn't work (still read-only), so then I tried a '*umount*' (which worked), but now I get the following error when trying to mount it again: root at server [~]# mount /backup/ mount: /dev/sdb1 already mounted or /backup busy root at server [~]# mount /dev/sdb1 mount: /dev/sdb1 already mounted or /backup busy I have also tried '*echo "- - -" > /sys/class/scsi_host/host1/scan*' and checked to see if any processes were using /dev/sdb1 or /backup using ' *fuser*' and '*lsof*'. I know a reboot will solve it, but I'm trying to avoid that as best I can, so I'm wondering if anyone else has any other ideas? Any help would be greatly appreciated, thanks. :) Regards, Kyle Thorne -- *The contents of this email are strictly private and confidential unless otherwise noted and is intended for the marked recipients only. If you are not a marked recipient please disregard and delete this email.*
Marcelo Roccasalva
2015-Mar-05 12:17 UTC
[CentOS] Cannot remount drive after lost iSCSI connection
Any clue on dmesg? I'd remove de disk and rescan... El jue., 5 de marzo de 2015 a las 7:40, Kyle Thorne (< kthorne at staff.ventraip.com>) escribi?:> Hi all, > > We've having an issue at the moment where an iSCSI connection was > temporarily lost on a few VMs running CentOS 6 on ESXi. > > The problem is, now that the iSCSI connection has returned, we are not able > to remount the drive. > > At first the drive is read-only, so I tried '*mount -o remount,rw*' which > didn't work (still read-only), so then I tried a '*umount*' (which worked), > but now I get the following error when trying to mount it again: > > root at server [~]# mount /backup/ > mount: /dev/sdb1 already mounted or /backup busy > root at server [~]# mount /dev/sdb1 > mount: /dev/sdb1 already mounted or /backup busy > > > I have also tried '*echo "- - -" > /sys/class/scsi_host/host1/scan*' and > checked to see if any processes were using /dev/sdb1 or /backup using ' > *fuser*' and '*lsof*'. > > I know a reboot will solve it, but I'm trying to avoid that as best I can, > so I'm wondering if anyone else has any other ideas? > > Any help would be greatly appreciated, thanks. :) > > Regards, > > Kyle Thorne > > -- > *The contents of this email are strictly private and confidential unless > otherwise noted and is intended for the marked recipients only. If you are > not a marked recipient please disregard and delete this email.* > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > >
Kyle Thorne
2015-Mar-05 13:29 UTC
[CentOS] Cannot remount drive after lost iSCSI connection
The most recent message is: [3108269.919256] sd 2:0:1:0: timing out command, waited 1080s [3108269.919528] sd 2:0:1:0: [sdb] Unhandled error code [3108269.919535] sd 2:0:1:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_OK [3108269.919540] sd 2:0:1:0: [sdb] CDB: Read(10): 28 00 00 01 21 47 00 00 08 00 [3108269.919586] EXT4-fs error (device sdb1): ext4_find_entry: reading directory #2 offset 0 Removing the device, rescanning, and then re-adding it worked, but that moved the device to /dev/sdc instead. Which is fine, but it would be much better if it was /dev/sdb. Thanks for your help. :) On 5 March 2015 at 23:17, Marcelo Roccasalva < marcelo-centos at irrigacion.gov.ar> wrote:> Any clue on dmesg? I'd remove de disk and rescan... > > El jue., 5 de marzo de 2015 a las 7:40, Kyle Thorne (< > kthorne at staff.ventraip.com>) escribi?: > > > Hi all, > > > > We've having an issue at the moment where an iSCSI connection was > > temporarily lost on a few VMs running CentOS 6 on ESXi. > > > > The problem is, now that the iSCSI connection has returned, we are not > able > > to remount the drive. > > > > At first the drive is read-only, so I tried '*mount -o remount,rw*' which > > didn't work (still read-only), so then I tried a '*umount*' (which > worked), > > but now I get the following error when trying to mount it again: > > > > root at server [~]# mount /backup/ > > mount: /dev/sdb1 already mounted or /backup busy > > root at server [~]# mount /dev/sdb1 > > mount: /dev/sdb1 already mounted or /backup busy > > > > > > I have also tried '*echo "- - -" > /sys/class/scsi_host/host1/scan*' and > > checked to see if any processes were using /dev/sdb1 or /backup using ' > > *fuser*' and '*lsof*'. > > > > I know a reboot will solve it, but I'm trying to avoid that as best I > can, > > so I'm wondering if anyone else has any other ideas? > > > > Any help would be greatly appreciated, thanks. :) > > > > Regards, > > > > Kyle Thorne > > > > -- > > *The contents of this email are strictly private and confidential unless > > otherwise noted and is intended for the marked recipients only. If you > are > > not a marked recipient please disregard and delete this email.* > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > http://lists.centos.org/mailman/listinfo/centos > > > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >-- *The contents of this email are strictly private and confidential unless otherwise noted and is intended for the marked recipients only. If you are not a marked recipient please disregard and delete this email.*
Hi, I have had the same problem and I solved it with following commands : iscsiadm -m node -o show (not sure this was useful) iscsiadm -m node --login iscsiadm -m session -o show after, umount -f and mount each mountpoint and now I can show disks with command blkid. Hope will help. Laurent -- View this message in context: http://centos.1050465.n5.nabble.com/CentOS-Cannot-remount-drive-after-lost-iSCSI-connection-tp5734264p5735868.html Sent from the CentOS mailing list archive at Nabble.com.
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