How do I add space to a file system?

[David Heard]

How do I add space to a file system?

[Pete Randall]

lvextend
extendfs
-or, if you have online jfs-
lvextend
fsadm


Pete

[TommyT]

Hi!
You can allways use SAM.

//Tommy

[Mark Grant · Accepted solution]

echo " " > /filesystem

Sorry, couldn't help it.

What do you mean by adding space? If you mean you want to increase it, then you need to increase the logical volume it sits on "lvextend" and then increase the filesystem "fsadm". If you have OnlineJFs then you can do this online, otherwise you need to unmount the filesystem first.

Youcan see that there are a few more question here that perhaps you could answer for us. Also, do you have any free space in the volume group or are you going to add more disks.

[John Carr_2]

Hi

it also depends which file system if you are not using JFS you cannot extend root or stand on the fly.

which file system do you wish to extend ?

John.

[Jeff Schussele]

Hi David,

To add space to an FS:

1) Determine if free space left in VG
vgdisplay -v /dev/vg_name
IF NOT - add a disk to VG
vgextend /dev/vg_name /dev/dsk/cXtYdZ

2) Extend the LV with the new space
lvextend -L XXXX /dev/vg_name/lv_name
where XXXX=new size in MB - must be larger than existing size of course

3) If you have OnLine JFS - extend the FS on the fly
fsadm -F vxfs -b XXXXM /mnt_point
where XXXX equals new, larger size & the "M" tells the command it's in MB

If you don't have OnLine JFS you'll have to unmount the FS before the lvextend commans & use
extendfs -F vxfs /dev/vg_name/lv_name
to extend the FS - it will use the entire new larger size by default & then mount the FS again & check the size

As you can see it's much easier w/OnLine JFS.

Rgds,
Jeff

[John Carr_2]

remember to backup your file system before extending - play safe :-)

John.

[Geoff Wild]

That depends...

Is there room left in the VG?

# vgdisplay /dev/vgXX

Check "Free PE"

If no - then you need to add more disk.

If yes, then what is your "PE Size (Mbytes)"

Multiply that by the "Free PE"

Next, lvdisplay /dev/vgXX/lvolXX

If "Allocation" is "strict/contiguous" - then you can only add to it if there are extents immediatley following that lvol...

If it's just "strict" - you are in business....

Do you have Online JFS?

If yes:

lvextend -L /dev/vgXX/lvolXX
fsadm -b M /filesystemmountpoint

If no, un mount the file system, then:
lvextend -L /dev/vgXX/lvolXX
extendfs -L /dev/vgXX/rlvolXX

Rgds...Geoff