Hello, I have a problem with 3 server machines and I would as far as possible try to isolate the bug which might be related to lvm or might not be. Perhaps someone can help me where and how to look for the problem: I am running 3 NFS and SMB servers (suse8.2; SuSE kernel 2.4.21-199, LVM 2.2.00.05) which run perfectly stable but show a strange behaviour when rebooting the machines: The filesystems which contain user directories cannot be umounted since the kernel claims that they are still busy. When I switch to single user mode and run fuser -v or lsof on the mountpoints I see no output. There are no more smb or other processes in the processlist that might access the filesystems but nevertheless I cannot umount them. The output of fuser -v shows only this: USER PID ACCESS COMMAND /export/user1 root kernel mount /export/user1 fuser -vm /export/user1 and lsof /export/user1 do not output anything. The filesystems are xfs on top of LVM2 logical volumes which again run on top of a md raid1 softmirror (the one and only physical vol) which is built upon a md multipath device: xfs_fs: LVM2: md_soft_raid1: md_multipath: Fibrechannel_hardware_raid_5 Basically all of the software except for LVM2 is a "original" suse 8.2 installation. The problem when I cannot umount the filesystems is, that the software mirror cannot be shut down cleanly so it is resynced when restarting the machine (eg for a kernel security upgrade). Since the mirror has a size of about 1TB this takes quite a long time. After all if one fine day during such a unneeded resync the data source, one of two hardware raid5 arrays should decide to fail then all the data on the mirror would be lost. At the moment usually one IDE disk in one hardware raid dies duing the sync. If two disks would die all the data could vanish in a big black hole. Actually I do not know at the moment how to go on searching and I cannot determine if eg LVM might be involved in this problem. So I would be very greatful if someone could give me a hint or perhaps even say that this cannot be a LVM problem. Thanks for any help Rainer -- --------------------------------------------------------------------------- Rainer Krienke, Universitaet Koblenz, Rechenzentrum, Raum A022 Universitaetsstrasse 1, 56070 Koblenz, Tel: +49 261287 -1312, Fax: -1001312 Mail: krienke@uni-koblenz.de, Web: http://www.uni-koblenz.de/~krienke Get my public PGP key: http://www.uni-koblenz.de/~krienke/mypgp.html ---------------------------------------------------------------------------
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