OK, point taken.


You may have read over it: i suggested to completely unmirror all the LVs (in the VG) first. From your lslv output i can see that at least "lv_usr1" is still mirrored - and most probably some mirror copies of certain LPs are already gone with the missing disks. I suppose the other LVs in the volume are mirrored too and their mirroring status is uncertain in the same way. Furthermore it makes no sense to reorganize a mirrored volume instead of unmirroring it, reorganize it and at last remirror it again. It simply doubles the work and limits the reorganization options.

No, not necessarily. A possible reason is that some PPs with mirror copies are not where the system expects them to be because the disks which used to provide these PPs are gone. Finally: you replaced two missing disks by one new one and most probably you lost raw diskspace. the VG was filled to capacity at the start and if you further reduced the available raw space you cannot mirror all the LVs any more.

Therefore:

- unmirror the VG completely. If you worry about possible data loss take a backup before but unmirror anyway. Do exhaustive fscks before to make sure the FSes are OK. (You will need downtimes for the fsck because the FSes must be unmounted.)

- After this is finished take stock of: how much raw space do you have and how much is used. If the space in your VG is already 50% or more used a complete mirror is not possible and you will have to select certain FSes/LVs which will get mirrors and others which don't. One way to circumvent this is to reduce the size of LVs/FSes to get usage below 50% again. Maybe some filesystems could do with a little less space?

If so, here is how to it: this command will reduce a FS "/some/where" and its underlying LV by 1GB. Notice that you can only assign whole PPs to a LV, therefore shrinking/expanding only takes place in steps of the PP size.

Code:

chfs -a "size=-1G" /some/where

- now do a reorgvg.

- set up mirrors again using the "mirrorvg" command. Notice that you might need to move a few LVs a second time because you have an odd number of PVs and mirrors are created on different disks (see your lslv output). You do this with the "migratepv" command, with which you can move around one or all the PPs of a LV to certain positions on certain PVs.

It might take considerably less time to get a second replacement disk and make the number of available PVs even again.

I hope this helps.

bakunin