topic reduce a filesystem using fsadm in Operating System - HP-UX

reduce a filesystem using fsadm

lawrenzo — Mon, 26 Apr 2004 11:31:03 GMT

Hello,

I have been tasked to reduce a file system by 1gb and increase an alternate filesystem by that 1gb.

I can increase using online JFS however I am not sure how to reduce the FS and do I need to reduce the LV as well?
Thanks

Re: reduce a filesystem using fsadm

Steven E. Protter — Mon, 26 Apr 2004 11:33:44 GMT

the command is lvreduce.

A word of advice: Don't cut down the by the total amount of free space shown on bdf.

Leave lots of spare space. It is possible to trash the logical volume. Back up the data first before proceeding.

lvreduce is required as part of this process.

SEP

Re: reduce a filesystem using fsadm

RAC_1 — Mon, 26 Apr 2004 11:36:56 GMT

Backup everything on this lvol.

fsadm -b"new_size"M /dev/vgxx/xxxx
lvreduce -L "new_size"M /dev/vgxx/xxxx

Anil

Re: reduce a filesystem using fsadm

Helen French — Mon, 26 Apr 2004 11:36:59 GMT

I would recommend you backup the file system before making any changes. This document is a good help while using fsadm (OnlineJFS) commands to resize file systems (TKB #LVMKBRC00005082):

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000066244335

Re: reduce a filesystem using fsadm

Hazem Mahmoud_3 — Mon, 26 Apr 2004 11:45:44 GMT

lvreduce can cause data corruption, so here are the steps you want to take:

1. tar all contents of filesystem and store on another filesystem or tape
2. lvreduce
3. untar everything back into filesystem

I think you may want to delete all the contents of the filesystem before you untar everything back into it to ensure you have good data files.
Like everyone said however, backup is key here:)

-Hazem

Re: reduce a filesystem using fsadm

lawrenzo — Mon, 26 Apr 2004 12:09:09 GMT

cool - that's done it for me.

TY all