topic Re: check for largefiles in Operating System - HP-UX

check for largefiles

brian_31 — Wed, 13 Sep 2006 08:45:38 GMT

How do i know if a paricular mount point supports large files from command line? (not looking at fstab)

THanks

Brian

Re: check for largefiles

Steven E. Protter — Wed, 13 Sep 2006 08:46:50 GMT

Shalom,

11i v1 and above you can't put largefiles in fstab any more.

The fsadm command has an option for checking a filesystem. It should be an option when newfs is run, though fsadm can also convert from non-largefiles to large.

SEP

Re: check for largefiles

Jaime Bolanos Rojas. — Wed, 13 Sep 2006 08:48:48 GMT

Brain,

Try with the fsadm command:

fsadm -F vxfs /home
largefiles

if large files is enable on the mount point, it will return largefiles.

Regards,

Jaime.

Re: check for largefiles

James R. Ferguson — Wed, 13 Sep 2006 08:49:30 GMT

Hi Brian:

# mkfs -m /dev/vgNN/lvolX

...you will see 'largefiles' or 'nolargefiles' among the other attributes used when the filesystem was created.

Regards!

...JRF...

Re: check for largefiles

spex — Wed, 13 Sep 2006 08:50:18 GMT

Hi Brian,

For filesystems you already have mounted:

# mount -v

PCS

Re: check for largefiles

James R. Ferguson — Wed, 13 Sep 2006 09:13:55 GMT

Hi (again):

You most certainly can put 'largefiles' or 'nolargefiles' in '/etc/fstab' on 11x releases.

The behavior is described in the manpages for 'mount_vxfs(1M)' [for instance] and 'fstab(4)'.

Regards!

...JRF...

Re: check for largefiles

marvik — Wed, 13 Sep 2006 09:22:54 GMT

You just have to do

lonvps03:/> fsadm -F vxfs /home
largefiles

Cheers!!
marvik

Re: check for largefiles

Simon Hargrave — Wed, 13 Sep 2006 09:36:10 GMT

It's probably worth pointing out that the largefiles option in fstab doesn't actually change the way the filesystem is mounted, it simply ensures that the filesystem will mount only if the specified option matches the flag on the filesystem. For example if fstab specified nolargefiles then the filesystem will only mount if the largefiles flag is off, similiarly opposite for largefiles.

If you don't specify it then the filesystem will be mounted regardless of the switch.

The only real use the fstab option has is that you can be sure filesystems that are mounted DO support largefiles. e.g. if you create your fstab entries and your filesystems, but forget to add -olargefiles to the filesystem, you'll know when it doesn't mount rather than after you've tried to restore a large file to it for example.