topic Re: change mounted fs options in Operating System - HP-UX

change mounted fs options

Jonathan Caplette_1 — Mon, 17 Dec 2007 20:32:14 GMT

Hi guys,

I've many filesystem mounted with these options:

/oraarch06 on /dev/vg06PA/lvARCH6 nosuid,log,largefiles on Sat Dec 1 12:37:55 2007

I would like to change "log" for "delaylog" and add these option: nodatainlog,
mincache=direct,convosync=direct

Can I add/change them while filesystem is mounted? I'm running OnlineJFS 3.3

regards
Jonathan

Re: change mounted fs options

Hasan Atasoy — Mon, 17 Dec 2007 20:36:24 GMT

hi jonathan ;

Assuming you have Online JFS, here is how to re-mount a filesystem:

mount -F vxfs -o delaylog,remount /somefilesys

please look at url

http://forums11.itrc.hp.com/service/forums/questionanswer.do;HP-FORUMS-S-WPA-IDX=HvDp1yRxhfwsWc5jqKTShTHvnc1Kjd67zYh8pxBJpKyHMCVJFyNp!-2121343701!525260783?threadId=180707

Hasan

Re: change mounted fs options

Jonathan Caplette_1 — Mon, 17 Dec 2007 20:46:48 GMT

Ok I read in that tread that it will work for FS that are listed in /etc/fstab...

Now my environement is using MC/SG... The options and filesystems are mounted with the SG script...

How can I do it online?

Re: change mounted fs options

Sandman! — Mon, 17 Dec 2007 20:52:14 GMT

Make changes in the package control script file and propogate those across all the nodes in the cluster. This ensures that the pkg startup script is updated on all the nodes. Shared filesystems i.e. those under MC/SG should not be listed in the /etc/fstab file.

Re: change mounted fs options

Jonathan Caplette_1 — Mon, 17 Dec 2007 20:54:20 GMT

I know I will have to replicate the options into the SG scripts... my question is:

Can I change the option on a FS online/mounted even if these FS are use with SG?

Re: change mounted fs options

Hasan Atasoy — Mon, 17 Dec 2007 20:54:24 GMT

hi jonathan ;

add that fs to temporarily to fstab and change mount options then delete from fstab. as said previous post also change package scripts.

Hasan.

Re: change mounted fs options

Sandman! — Mon, 17 Dec 2007 21:04:44 GMT

>I know I will have to replicate the options into the SG scripts... my question is:

>Can I change the option on a FS online/mounted even if these FS are use with
>SG?

Yes you can in the array associated with a mounted filesystem in the package control script. For example.

FS_MOUNT_OPT[?]="-o nodatainlog,mincache=direct,convosync=direct"

Re: change mounted fs options

James R. Ferguson — Mon, 17 Dec 2007 22:15:49 GMT

Hi Jonathan:

As far as I know, no current version of HP-UX has the Linux equivalent of 'mount -o remount' as when changing from a readonly to a read/write mounting without first explicitly un-mounting.

Regards!

...JRF...

Re: change mounted fs options

Jonathan Caplette_1 — Tue, 18 Dec 2007 16:49:34 GMT

Thanks guys...

I added an temporary entry in /etc/fstab for each filesystem that I had to change...

Did the mount ... with the new options, deleted the entry in /etc/fstab and then added the new options in the control script for MC/SG!

Regards!
Jonathan

Re: change mounted fs options

James R. Ferguson — Fri, 18 Jan 2008 14:40:56 GMT

Hi (again) Jonathan:

UPDATE: You *CAN* perform this dynamically. Please see Duncan's post in:

http://forums12.itrc.hp.com/service/forums/questionanswer.do?threadId=1194209

See also, the '-o remount' option:

http://docs.hp.com/en/B3921-60631/mount_vxfs.1M.html

Regards!

...JRF...