topic Re: largefiles on root in Operating System - HP-UX

largefiles on root

Chris Hebert — Thu, 25 Apr 2002 21:18:47 GMT

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.

Re: largefiles on root

Michael Tully — Thu, 25 Apr 2002 21:26:49 GMT

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

Re: largefiles on root

Chris Hebert — Thu, 25 Apr 2002 21:30:22 GMT

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".

Re: largefiles on root

Michael Tully — Thu, 25 Apr 2002 21:41:01 GMT

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

Re: largefiles on root

Chris Hebert — Thu, 25 Apr 2002 21:49:04 GMT

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.

Re: largefiles on root

James R. Ferguson — Thu, 25 Apr 2002 22:02:20 GMT

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...

Re: largefiles on root

Chris Hebert — Thu, 25 Apr 2002 22:05:46 GMT

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

Re: largefiles on root

hpuxrox — Fri, 26 Apr 2002 03:03:03 GMT

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,