topic Re: fsadmin in Operating System - HP-UX

fsadmin

kunjuttan — Mon, 21 Dec 2009 06:44:58 GMT

can we able to use fsadmin command for reducing LV?

Re: fsadmin

Michal Kapalka (mikap) — Mon, 21 Dec 2009 06:54:03 GMT

hi,

check this thread from ITRC :

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=142809

mikap

Re: fsadmin

Johnson Punniyalingam — Mon, 21 Dec 2009 06:56:21 GMT

are you refering to "fsadm" ?

yes you can

Re: fsadmin

kunjuttan — Mon, 21 Dec 2009 06:57:23 GMT

can you please give me the syntax?

Re: fsadmin

Johnson Punniyalingam — Mon, 21 Dec 2009 06:57:29 GMT

step 1 :-

fsadm -F vxfs -b M

step 2 :- reduce logical volume by lvreduce:

lvreduce -L

Re: fsadmin

kunjuttan — Mon, 21 Dec 2009 06:58:56 GMT

But this wil result in data losing.right?

Re: fsadmin

Jeeshan — Mon, 21 Dec 2009 07:02:21 GMT

Yes, you can use "fsadm" command to increase or decrease value while file system online.

But, before that, check that you have OnlineJFS license to use fsadm.

Re: fsadmin

Michal Kapalka (mikap) — Mon, 21 Dec 2009 07:03:51 GMT

hi,

its recomended to make a backup of the FS, before you play with the LVM.

I do it always, before start to work on the system.

mikap

Re: fsadmin

Jeeshan — Mon, 21 Dec 2009 07:06:50 GMT

Before doing any system activities or maintenance (LVM, Kernel, patch installation etc.) its highly recommended to take system backup.

Re: fsadmin

Johnson Punniyalingam — Mon, 21 Dec 2009 07:10:35 GMT

>>But this wil result in data losing.right?<<

if you all the LVM patches are up to date,

no margin for data lose,

Its better to take full backup of the file system before you reduce.

my 2cents .

Thanks,
Johnson

Re: fsadmin

SoorajCleris — Mon, 21 Dec 2009 07:11:53 GMT

Hi johnson,

===> step 1 :-

fsadm -F vxfs -b M

There is a correction. Running this command he will loose his data..

"-b" size in KB. We should always take are while running this command

Regards,
Sooraj

Re: fsadmin

SoorajCleris — Mon, 21 Dec 2009 07:16:11 GMT

Hi,

I told loosing data even in case if he is running this command to increase the size of the filesystem

Becaue if we increasing a filesystem to 2GB thinking -b in MB , the file system will reduce to 2 MB :)

lvextend uses -L with size in MB.

Regards,
Sooraj

Re: fsadmin

SoorajCleris — Mon, 21 Dec 2009 07:16:50 GMT

loose* - lose

sorry :P

Re: fsadmin

Sp4admin — Mon, 21 Dec 2009 16:51:43 GMT

Hello,

As stated above you can use fsadm and lvmreduce commands to achive this. But as stated make sure patch level is current and you bcakup the filesystem just incase you run into some problems.

sp,

Re: fsadmin

Viktor Balogh — Tue, 22 Dec 2009 13:02:00 GMT

I usually go this way:

1) reduce the filesystem a little bit smaller as it should be. e.g.: I reduce it to 99Gbyte instead of 100Gbyte.

2) Reduce the LV to 100Gbyte

3) grow back the FS to 100Gbyte.

I know it's lame, but I like to be always sure that I will have no data loss. If you prefer, go this way.