Online JFS Not Using SAM

[Mark Duffy]

I am trying to extend a file system with Online JFS without using SAM. I can't seem to be able to do this without un-mounting the filesystem but can through SAM.

I'm doing the following

lvextend -L 500 /dev/vg00/lvol9

extendfs /dev/vg00/rlvol9

At the extendfs end, it errors that lvol9 cannot be extended as it is mounted.

A bdf did not show the new file system size, yet when I tried to use SAM to do increase the file system size it showed that lvol9 had now grown to 500MB.

Am I missing something here? I thought the whole point of Online JFS was that size increases can be done on the fly without un-mounting? Can this only be done through SAM?

[James R. Ferguson · Accepted solution]

Hi Mark:

I believe that the problem you are having is that you are using 'extendfs' when you should use 'fsadm'.

You should have done something like:

# lvextend -L 100 /dev/vgXX/lvolX
# fsadm -b 102400 /xxx

...JRF...

[Ron Cornwell]

. Increasing an HP OnlineJFS File System

Extend the logical volume e.g. /dev/vg01/lvol5 to the needed size:

# lvextend -L [lv_size_MB] /dev/vg01/lvol5

Extend the JFS file system online:

# fsadm -F vxfs -b [lv_size_MB]M /mountdirectory

NOTE: You need to add M directly to the lv_size_MB.

Check the size of the increased file system:

# bdf

[Rob Smith]

I am almost certain when using online JFS you use the fsadm with the appropriate options to modify file systems on the fly. Check the man pages. Hope this helps!

Rob

[James R. Ferguson]

Hi Mark (again):

An excellent guide to standard LVM tasks, including routine JFS mainenance is found in the HP-UX System Administration Tasks manual:

http://docs.hp.com/hpux/onlinedocs/B2355-90672/B2355-90672.html

...JRF...

[Mark Duffy]

Thanks guys for the successful (and quick) responses.

Thanks for the URL James