topic Re: Create Logical volume in Operating System - HP-UX

Create Logical volume

Shehan — Wed, 19 Dec 2007 13:04:40 GMT

Hi All

I am planning to create several lvol(lvol1, lvol2,lvol3) in my new volume group(VG05). Please guide me to create those logical volumes in CLI mode.

Thanks
Niru

Re: Create Logical volume

Torsten. — Wed, 19 Dec 2007 13:10:34 GMT

Basic usage is here:

http://docs.hp.com/en/B2355-60105/lvcreate.1M.html

Do you want to mirror the LVOLs and if, how many disks are in that VG?

Re: Create Logical volume

Hasan Atasoy — Wed, 19 Dec 2007 13:15:23 GMT

hi niru ;

the basic create command is

lvcreate -n lvname1 -L sizeinMB vg05

without striping or mirrorring.

Hasan

Re: Create Logical volume

Doug O'Leary — Wed, 19 Dec 2007 13:51:00 GMT

Hey;

Basic usage information can be found at http://www.olearycomputers.com/ll/hplvcreate.html

The way I normally do this is to create a data file:

#VG LV SIZE MP
######################
vg05 lvol1 2048 /oracle
vg05 lvol2 1024 /oracle/fs1
vg05 lvol3 512 /oracle/fs2
vg05 lvol4 8196 /oracle/fs3
vg05 lvol5 8196 /oracle/fs4

Then, you read through the data file:

grep -v ^# ${file | while read vg lv size
do
echo lvcreate -L ${size} -n ${lv} ${vg}
[[ ${size} -gt 2048 ]] && args="-o largefiles" || args=""
echo newfs -F vxfs ${args} /dev/${vg}/r${lv}
[[ ! -d ${mp} ]] && mkdir -p -m 755 ${mp}
[[ ${size} -gt 2048 ]] && args=",largefiles" || args=""
echo "${lv} ${mp} vxfs delaylog${args} 0 2" >> /etc/fstab
echo mount ${mp}
done

If that looks right, remove the echos.

Doug O'Leary

Re: Create Logical volume

Torsten. — Wed, 19 Dec 2007 13:56:06 GMT

Nice script Doug, but for somebody who asked how to use lvcreate this script may be overkill
;-)
Or not?

Re: Create Logical volume

Doug O'Leary — Wed, 19 Dec 2007 14:01:49 GMT

lol! Probably. I refer you to my personal quote:

"A good script will make an admin's day... A bad one will ruin it."

Doug

Re: Create Logical volume

Torsten. — Wed, 19 Dec 2007 14:12:10 GMT

totally agree with you :-)