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тАО11-18-2008 06:01 AM
тАО11-18-2008 06:01 AM
file system super-block update failed when mounting a lun on 2 systems
i present a lun (DMX-3 Disk Array) to 2 servers (HP 11iv3):
- the first server use it in read-write mode (vgchange -a y, mount -o=rw)
- the second is in read only mode (vgchgid on pv for more than one copy,vgchange -a r,mount -o=ro)
when activating vg in read-only mode on the second server, the first one is disabling the corresponding FS:
*** bdf gives:
/toto: I/O error
*** syslog gives:
Nov 18 11:36:38 hptoto vmunix: vxfs: WARNING: msgcnt 62 mesg 025: V-2-25: vx_wsuper - /dev/vgtoto/lvtoto file system super-block update failed
Nov 18 11:36:38 hptoto vmunix: vxfs: WARNING: msgcnt 63 mesg 031: V-2-31: vx_disable - /dev/vgtoto/lvtoto file system disabled
what's wrong with my method ?
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тАО11-18-2008 07:59 AM
тАО11-18-2008 07:59 AM
Re: file system super-block update failed when mounting a lun on 2 systems
if you change the vgid of the disk, then on the firdt node is not going to recognize the disk as part of the vg.
you can use vgchgid when using cloned disks(no the same disk) after a flashcopy or BCopy.
if you wan't to have both vg active, with service guard, you can do:
on your first node vgchange -a e /dev/vg and mount it rw
On the second node vgchange -a r /dev/vg mount it read-only
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тАО11-18-2008 02:55 PM
тАО11-18-2008 02:55 PM
Re: file system super-block update failed when mounting a lun on 2 systems
you can use LVsplit to split a mirrored LV and mount the split off copy to another node or you can createa snapshot in the disk array and mount the unique snapshot lun to another node. What you want to do will not work.
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тАО11-18-2008 10:58 PM
тАО11-18-2008 10:58 PM
Re: file system super-block update failed when mounting a lun on 2 systems
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тАО11-18-2008 11:27 PM
тАО11-18-2008 11:27 PM