largefiles on root

[Chris Hebert]

What is someone really wants/needs to enable large files on the root filesystem? If you boot into maintenence mode "hpux -lm" what do you do then?
I tried using fsadm on the lvol but it says the device doesn't exist.

[Michael Tully]

Hi Chris,

If you already haven't done so, you need to increase the size of your partition first. Because this partition has to be contiguous, it has to be done either by a fresh install, via ignite or on-line JFS.

Why would you want your root filesystem more than 2Gb anyway??

Anyway here is the entry for largefiles in /etc/fstab

/dev/vg00/lvol3 / vxfs delaylog,largefiles 0 2

Having given this more thought I'm not sure it can be done..... I'be interested in hearing what others have to say...

Michael

[Chris Hebert]

For the application I'm running on this workstation we created just the root filesystem with 6G, no others. So its plenty big. But when I boot "hpux -lm" and try "fsadm -F hfs -o largefiles /dev/vg00/lvol3" it says "No such device or address".

[Michael Tully]

By default (HPUX 11 and later) the /dev/vg00/lvol3
logical volume is created as a JFS filesystem.
Is your filesystem JFS (vxfs) or HFS ? You can only change this when installing a system.

On my system when I run this command:
# fstyp /dev/vg00/lvol3
vxfs

[Chris Hebert]

I'm running 10.20. The root filesystem is hfs.

Is there not a way to modify the root filesystem other than when installing? Surely there must be. I would have thought there is a boot mode which does not mount the root and allows modification, etc. of it.

[James R. Ferguson]

Hi Chris:

I believe that the problem you are facing is that you are not using the *raw* device:

# fsadm -F hfs -o largefiles /dev/vgXX/rlovX

However, I would *not* enable largefiles on any of the logical volumes associated with vg00. The reason is that Ignite 'make_tape_recovery' utilizes 'pax' to create its archive and 'pax' does not support largefiles.

Regards!

...JRF...

[Chris Hebert]

Thanks for the suggestion James, but I tried that too. Got the same result.

[hpuxrox]

This my sound a little odd and Im not sure if it will work. I dont have a box to test it on.

If you have a mirrored root volume group. Split your mirrors. Mount the Split lvol / to /mnt and fsadmin your the /mnt filesystem to support large files. Dismount /mnt. Reboot on your mirror drive and lvmirge your lvols. Then reboot back to the primary.

Let me know if you try and get it to work,