topic Re: Determine largefile support 11.23 in Operating System - HP-UX

Determine largefile support 11.23

Cossam Mafuta — Thu, 06 Sep 2007 11:20:47 GMT

I do not have root access but am a developer with limited access is it possible to determine whether a filesystem has largefiles option in HP-UX B.11.23 ia64.

Checked fstab - no largefiles options in there
Tried fstyp, fsadm, mkfs with several options all these do not work with limited access.

Re: Determine largefile support 11.23

Steven E. Protter — Thu, 06 Sep 2007 11:34:31 GMT

Shalom,

largefiles was taken out of fstab in 11.11

fstyp -v

This may however require root access to get the information.

SEP

Re: Determine largefile support 11.23

James R. Ferguson — Thu, 06 Sep 2007 11:58:17 GMT

Hi:

In the absence of permissions to run 'mkfs', 'fsadm' or 'fstyp' I suppose you could simply test your ability to create a largefile (>2GB). A simple test is:

# perl -e 'open(FH,">","./LARGE") or die;seek(FH,2**32,1) or die'

IF 'largefiles" is allowed, your filesystem will have a sparse file of size 4,294,967.298. IF 'largefiles' is NOT enabled, the resulting file will show zero (0) size.

The ability to specify 'largefiles' and 'nolargefiles' options in '/etc/fstab' was *NOT* removed in current releases. Rather, the absence of any option simply allows the state of the filesystem to determine whether it is mounted with largefiles enabled or not.

Regards!

...JRF...

Re: Determine largefile support 11.23

James R. Ferguson — Thu, 06 Sep 2007 12:09:56 GMT

Hi (again):

Ooops! I dropped a write. The correct script should be:

# cd /path_to_evaluate

# perl -e 'open(FH,">","./LARGE") or die;seek(FH,2**32,1) or die;print FH "\n"'

# ls -l LARGE

Regards!

...JRF...

Re: Determine largefile support 11.23

James R. Ferguson — Thu, 06 Sep 2007 12:37:19 GMT

Hi (again) Cossam:

I see that you are new to the ITRC today. Welcome to the community!

Please consider:

http://forums1.itrc.hp.com/service/forums/helptips.do?#28

Regards!

...JRF...

Re: Determine largefile support 11.23

Cossam Mafuta — Fri, 07 Sep 2007 06:02:08 GMT

Thanks will tried perl option seemed to work.