AIX

Hello all,

I create a backup of a file system with

Code:

hostA #  find . | backup -iqvf /backup/hostA.fsA.backup

After a while I get the following error message:

Code:

backup medium write error: File too large
Check backup media and rerun the backup

/backup is a NFS mount and is the backup device here (I think).
Then I mount the NSF share on another server and ran a new backup command.

Code:

hostB # find . | backup -iqvf /backup/hostB.fsB.backup

To my suprise hostB can create far larger backup files and does not see the error message.

Code:

# ls -l /backup
-rw-r--r--    1 root     system   1073741312 Nov 16 12:15 hostA.fsA.backup
-rw-r--r--    1 root     system   19677542400 Nov 16 12:27 hostB.fsB.backup

The size of hostA.fsA.backup is ~1GB.
The size of hostB.fsB.backup is ~19GB.


On hostA & hostB /backup is mounted with nfs3

Code:

# mount | grep /backup
server /export/backup   /backup          nfs3   Nov 07 12:02 # hostA
server /export/backup   /backup          nfs3   Nov 15 14:48 # hostB

I then tried the tar command but it also stopped at ~1GB with an error message.

Why can't hostA write more that 1GB to my NFS share while other hosts can?

Maybe your user is limited?

Code:

ulimit

.. will show the maximal block size (512 bytes) a file may have with your user on this system.

Thanks Zaxxon,

Right on the spot. Changed it to unlimited and the backup runs fine.

You're welcome^^ Btw, 19 TB is already above the recommended file size for jfs2 which is 16 TB:
IBM Information Center - JFS2 Limits

Not that you run into severe problems over time.

Thanks for the warning.

/backup is 800GB so I hope not to touch the 16TB soon :-)

Ah ok - was still having the size stuck in my head, sorry

Nevermind^^