Largefiles option on the fly..

[dattu_1]

Hi ,
I need to convert my existing filesystem to support largefiles option...can i do it on fly.....o.s. hp-ux 11.23

[RAC_1 · Accepted solution]

If you have online JFS. fsadm -F vxfs -o largefiles /dev/vgxx/lvolx. Else you will have to unmount the FS.

[inventsekar_1]

11.23, but which OE?

Identifying the OE
To identify the Operating Environment currently installed on your system, use swlist. For example:

/usr/sbin/swlist HPUX11i-*

The output of this command includes a line that identifies the installed OE. For example:

HPUX11i-OE B.11.23 HP-UX 11i Operating Environment Component


[ with MCE OE, Online JFS is available with the OS itself. i think. i am not sure. check it. ]

[Raj D.]

Hi dattu,

You can do it using fsadm

# fsadm -F vxfs -o largefiles /dev/vgxx/lvolx


Check if you have online jfs installed:
# swlist -l product | grep -i online


Cheers,
Raj.

[marvik]

Dattu,

The options given to you by RAC and RajD should server the purpose,Incase u dont have
Online JFS take a backup of ur lvol and recreate a new lvol with largefiles supported

newfs -F vxfs -o largefiles /dev/vgxx/rlvolxx
and can copy the data to this new lvol then.For faster copy umount the FS where u copied the data and then

dd if=/dev/vgxx/rlvolxx of=/dev/vgxx/rlvolxx bs=1024k

where if=source
of=target

and mount the new lvol at the desired dir.

Cheers
Vikram

[dattu_1]

Hi guys,
Without online JFS its not possible right.???
Thanks for ur replies.

[Jaime Bolanos Rojas.]

Dattu,

Yes it's possible without online jfs, but will will have to unmount the file system and fsck will be called after done.

This shows how to convert to large files

/usr/sbin/fsadm -F vxfs -o largefiles /dev/vg02/rlvol1


Regards,

jaime.

[inventsekar_1]

>>Without online JFS its not possible right.???

No. without online JFS, u need to unmount the FS first.
from man fsadm:
------------------------------------------------------
The fsadm command is designed to perform selected administration tasks
on file systems. These tasks may differ between file system types.
special is a device file containing an unmounted file system. However,
if the file system is of the type that provides online administration
capabilities the special could be a directory. directory must be the
root of a mounted file system.
------------------------------------------------------

also,
http://docs.hp.com/en/B2355-90950/ch06s02.html#bajbbeef

[Pete Randall]

I'm sorry but I don't see anywhere in the man page where it says the FS has to be unmounted to convert to largefiles.

root# bdf -l
Filesystem kbytes used avail %used Mounted on
.
.
.
/dev/vg00/lvol30 4096000 2104 3838035 0% /testfs
root# fsadm /testfs
fsadm: /etc/default/fs is used for determining the file system type
nolargefiles
root# fsadm -o largefiles /testfs
fsadm: /etc/default/fs is used for determining the file system type
root# fsadm /testfs
fsadm: /etc/default/fs is used for determining the file system type
largefiles
root# swlist -l product |grep -i online
PHCO_25831 1.0 SCSI Ultra160 driver Online Addition scr
ipt


As you can see, bdf shows it's mounted, it has "nolargefiles", I changed it to "largefiles", and swlist shows that I do not have OnlineJFS.


Pete

[Dave Hutton]

I agree with Pete, I'm 99% sure I've done it on the fly without OnlineJFS.
I remember being surprised that I could.