Replace a filesystem

[MSwift]

I have system running 11.0 and i have to get rid of a filesystem /app02 mounted on /dev/vg03/lvol2 and this is mirrored. i need to get rid of this filesystem and use that disk to create a new filesystem /usr/ed and mirror it. Could you please give me the exact steps for this operation. no online JFS.

Thanks

MSwift

[Dennis Handly]

A simple solution would be to remove all of the files there and then umount and mount it on /usr/ed. Especially since it already is mirrored.
This assumes you don't want to change any of the properties of the filesystem.

[Pete Randall]

umount
lvremove
lvcreate
newfs
lvextend -m 1


Pete

[James R. Ferguson]

Hi:

Similar to Dennis's suggestion, though, I would 'newfs' ('mkfs') the filesystem rather than recursively (and slowly) remove its contents:

# umount /app02
# mkfs -F vxfs -o largefiles /dev/vg03/lvol2
# mount /dev/vg03/lvol2 /usr/ed

Be sure to edit '/etc/fstab' to replace '/app02' with '/usr/ed'

This leaves all the underlying LVM configuration intact. LVM mirroring occurs at the logical volume level and the filesystem lies above that.

Regards!

...JRF...

[Sajjad Sahir]

Dear
1. umount the files sytem.
umount /app02

2. remove logical volume

by using lvremove

3. create new logical volume
lvcreate -L size /dev/vg03/lvol2

4.create new file system by using newfs command
5. create new dir /usr/ed

finally mount the file system in that dir.

thanks and regards

Sajjad

[MSwift]

THANKS JRF!!!!!! Exactly what i was looking for. One question though, when we normally use newfs we use it on rlvol, so is that why you have suggested mkfs? Thanks again

MSwift.

[James R. Ferguson · Accepted solution]

Hi (again):

I tend to refer to 'mkfs' instead of 'newfs' only because though 'newfs' is a "friendly" front-end to the 'mkfs' the bulk of the information (options and arguments) can be found in the manpages for 'mkfs', as for example:

http://www.docs.hp.com/en/B3921-60631/mkfs_vxfs.1M.html

Regards!

...JRF...