| Resizing an XFS filesystem on a multipath device | ||
|---|---|---|
 | Part I. Miscellaneous subjects (and those still to be sorted) |  |
| Resizing an XFS filesystem on a multipath device | ||
|---|---|---|
| | Part I. Miscellaneous subjects (and those still to be sorted) | |
March 2012
I 've got a 3 TB filesystem on a SAN volume, and it's growing too large. The server guys added another 3TB to the colume, and now I've got to enlarge the filesystem.
I had to reboot anyway, and now the system sees the extra space:
apprentice@fileserver:~$ sudo multipath -l
<snip>
emc001 (012345678901234566789012345678900) dm-2 DGC,VRAID
size=5.9T <snip>
apprentice@fileserver:~$ sudo pvresize /dev/dm-2
Physical volume "/dev/dm-2" changed
1 physical volume(s) resized / 0 physical volume(s) not resized
apprentice@fileserver:~$ sudo pvdisplay /dev/dm-2
--- Physical volume ---
PV Name /dev/dm-2
VG Name vg-mirror
PV Size 5.86 TiB / not usable 3.81 MiB
Allocatable yes
<snip>
XFS filesystems can be enlarged but cannot shrink, so I don't want all that space in my FS yet, and I increase the LV by just 1TB.
apprentice@fileserver:~$ sudo lvresize -L+1TB /dev/vg-mirror/lv-mirror
Extending logical volume lv-mirror to 4.12 TiB
Logical volume lv-mirror successfully resized
apprentice@fileserver:~$ sudo xfs_growfs /srv/pubmirror/
<snip>
data blocks changed from 838859776 to 1107295232
apprentice@fileserver:~$ df -h /srv/pubmirror/
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg--mirror-lv--mirror
4.2T 3.0T 1.2T 72% /srv/pubmirror