Create VG, LV, and FS Using Old Configurations

[zap_2]

Hi Unix Gurus,

I want to format some of our existing hard disks that belong to certain vgs and reattach them again to those vgs because of some files have damaged that reside on that vgs.We use mirroring method.
These are my lvmtab for vgs that I want to rebuild them:
/dev/vg03
/dev/dsk/c3t8d0
/dev/dsk/c3t9d0
/dev/dsk/c6t9d0
/dev/vg04
/dev/dsk/c2t0d2
/dev/dsk/c4t1d2
/dev/vg05
/dev/dsk/c2t0d0
/dev/dsk/c4t1d1
/dev/dsk/c4t1d3
/dev/dsk/c4t1d0
/dev/dsk/c2t0d1
/dev/dsk/c2t0d3

vg03 that contains as follow:
lvol1 VxFS 34720 MB 0 /u01
lvol2 VxFS 34720 MB 1 PVG-strict /u02

lvol1 using /dev/dsk/c3t9d0
lvol2 using mirroring methode between /dev/dsk/c3t8d0 and /dev/dsk/c6t9d0

Please help me step by step to rebuild my file system.Thanks a lot.

[Rita C Workman]

Well, technically, you can vgexport any vg and then do your vgimport AND define only what disks to bring back in:
vgimport -m vg /dev/dsk/c-t-d- /dev/dsk/c-t-d- ......

....but I'm not sure that's what your needing or wanting. If some files are damaged, then restore them from your backups (tape or whatever). Because doing specific vgimports is not something you do normally and if your not familiar with it you could cause more damage than good.

Hope that helps,
Rita

[Eknath]

Hi Zap,

You can proceed in the following way
use #pvdisplay on each disk
draw rectangle for each disk with lvols on it (if its mirror copy, if possible mention the size also)
plan to move the lvols to other disk (e.g in your example above, if you have enough space on c3t9d0 break mirror of lvol2 on c6t9d0 and mirror lvol2 on c3t9d0, So you get c6t9d0 disk free...)Similarly you can plan for other VGs. (Draw simple sketch which will give you idea)

Cheers!!!
eknath

[Devender Khatana]

Hi,

What you are trying to do is not required in any sense. If you have logical corruption for files then you can restore from backup 9 in fact that you will do after recreation). You can go for recreation of file system at the max which will remove the contents of the LVOLs.
For achiving this follow.

1. Unmount the file systems you want to recreate.

#umount /u01
#umount /u02
2. Run newfs command on all those one by one

#newfs -F vxfs -o largefiles /dev/vg03/lvol1
#newfs -F vxfs -o largefiles /dev/vg03/lvol2

HTH,
Devender