topic Re: reducing logical volume size ? in Operating System - HP-UX

reducing logical volume size ?

rbarot — Mon, 17 Nov 2003 07:04:12 GMT

I have one logical volume of 500 MB on HDD and want to reduce it to 350 MB. Data on HDD is 58 MB. HOw to go ahead ? Can I use lvreduce ? What abt DATA on HDD..will it be there ?

Re: reducing logical volume size ?

ketan_5 — Mon, 17 Nov 2003 07:13:20 GMT

Simple command...just reduce it by giving lvreduce. But it is sure ,you will be losing your data...take reliable backup first..

Re: reducing logical volume size ?

TSaliba — Mon, 17 Nov 2003 07:15:03 GMT

hi
to reduce your logical volume you maust first take a backup up , then perform:

lvreduce -L 350 /dev/vg##/lvol#

then newfs -F vxfs /dev/vg##/rlvol#

then restore the data to the new reduced lvol.

hope this help

Re: reducing logical volume size ?

Robert-Jan Goossens — Mon, 17 Nov 2003 07:15:43 GMT

Hi,

I don't know id you have online jvs installed, but below notes are save.

Create an archive in an other filesystem,

# cd /dir
# tar cvf /tmp/test.tar .
# cd /
# umount /filesystem
# lvreduce -L 350 /dev/vgXX/lvolX
# newfs -F vxfs /dev/vgXX/rlvolX
# mount /filesystem
# cd /tmp
# tar xvf test.tar /dir

Re: reducing logical volume size ?

Thayanidhi — Mon, 17 Nov 2003 07:17:01 GMT

Hi,

Do you have Online JFS installed?
Is it a vxfs filesystem on the HDD?

If the bth of above id false then you may lose your data!!

Keep good backup of data and do a

# lvreduce -L /dev/vgXX/lvolXX

TT