lvreduce with error when trying to reduce mirror

[Juergen Feldmann]

Hi guys,

mirrored system (vg00) needs hw-replacement.
When trying to reduce the mirror one lvol still fails:

root@kong[/usr/local/sbin]# lvreduce -m 0 /dev/vg00/lvol7 /dev/dsk/c0t6d0
lvreduce: Couldn't reduce the logical volume:
Device busy
lvreduce: The LVM device driver failed to reduce mirrors on
the logical volume "/dev/vg00/lvol7".
root@kong[/usr/local/sbin]#

HOW can I force the system to do that before I replace the harddisk?

Thanks for your help!
Juergen

[Torsten. · Accepted solution]

No need to reduce the mirror.

Complete procedure:

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad_WP.pdf

[Juergen Feldmann]

oops, sorry forgot to mention it's HPUX 11.11

[Johnson Punniyalingam]

No Problem,


You can follow above "link" its verfy usefull and its command for all HPUX versions and it show how to rectify your problem, follow steps in the pdf file. Its wonder full pdf file& worth of reading it.


Rgds,
Johnson

[Juergen Feldmann]

thank guys, was able to fix it.

have a nice day
Juergen

[Torsten.]

Even a patched 11.11 system has the pvchange -a n ... command.

Problem is, while changing the configuration (lvreduce) the system wants to write this to all disks. Witch a "almost dead" disk you may see such problems as you did. pvchange will avoid this.

[dukui_1]

1. check the lv mybe it the swap lv
2. fuser -c the mount point
3.lvdisplay -v /dev/vg00/lvol7
check the pe status