topic fsadm to decrease the filesystem size fails with error... in Operating System - HP-UX

fsadm to decrease the filesystem size fails with error...

Yashwanth — Mon, 11 Dec 2000 04:46:17 GMT

When I run fsadm to decrease the filesystem size, the command results in the following. This is on Series 700 system, running hp-ux 10.20.

# bdf /var
Filesystem kbytes used avail %used Mounted on
/dev/vg00/lvol8 462848 94095 346975 21% /var
# fsadm -F vxfs -b 350000 /var
fsadm: cannot shrink /dev/vg00/rlvol8 - upgraded fs - inodes are currently in use.

Re: fsadm to decrease the filesystem size fails with error...

Stefan Farrelly — Mon, 11 Dec 2000 08:16:51 GMT

fsadm can only decrease an lvol if the part of the filesystem you are trying to reduce has no files on it. In your case it does, so it is unable to reduce it. You can try to defrag the filesystem, this may move the offending file(s) to the first part of the filesystem allowing the reduce to work (use fsadm -e -d).
If you use JFS 3.3 (for 11) fsadm will attempt to move the offending files out of the way first which works most of the time, a good imporvement.

Re: fsadm to decrease the filesystem size fails with error...

Dan Hetzel — Mon, 11 Dec 2000 08:40:57 GMT

Hi,

For fsadm to be able to shrink your disk, you should first defragment it with:
fsadm -F vxfs -d -e -s /var

The -s flag will provide you with a summary showing if some files couldn't be moved.

You have a few files open on /var, like /var/adm/syslog/syslog.log which could be quite large and need to be moved.
'fuser' will report all processes having a file open.

Once defragmented, you may shrink your filesystem using the same command you already tried.

Best regards,

Dan

Re: fsadm to decrease the filesystem size fails with error...

Insu Kim — Tue, 12 Dec 2000 09:18:51 GMT

This problem is a known limitation of JFS.

Reducing the size of a file system will fail if there are file-system resources currently in use within the sectors to be removed from the file system regardless of whatever is done first.
Therefore, fsadm is behaving correctly.

Regards,

Re: fsadm to decrease the filesystem size fails with error...

Donald Kok — Thu, 14 Dec 2000 17:37:12 GMT

indeed you can defrag with fsadm. defrag works straight forward over the volume from begin to the end.

On a working machine the file system can put files in the just freed area. fsadm doesnt prevend this. So at the end of the defrag action, there are new files in the area you want to reduce.

To prevend this go to single user mode first.
Gool luck

Re: fsadm to decrease the filesystem size fails with error...

Madhu Sudhan_1 — Thu, 14 Dec 2000 18:09:40 GMT

Yashwanth !
If fsadm fails, only way is to backup(of course multiple copies) the filesystem with all the attributes and reduce the lv and recreate the filesystem and restore the data.

...Madhu