How to correct mistake of lvextend cmd ?

[Jerry_109]

Hello All,

Quick question, how can I correct a mistake I made. I extended the wrong logical volume ( /dev/vg00/usr ). Now the lv shows 5000, but the extendfs cmd was never entered, so bdf still shows 4096000 ?

#########################
HP-UX fdhp31 B.11.23 U /A500-7X
#########################
root@fdhp31[/root]
# bdf /usr
Filesystem kbytes used avail %used Mounted on
/dev/vg00/usr 4096000 1700040 2377272 42% /usr
root@fdhp31[/root]
# lvdisplay /dev/vg00/usr
--- Logical volumes ---
LV Name /dev/vg00/usr
VG Name /dev/vg00
LV Permission read/write
LV Status available/syncd
Mirror copies 0
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 5000
Current LE 625
Allocated PE 625
Stripes 0
Stripe Size (Kbytes) 0
Bad block on
Allocation strict
IO Timeout (Seconds) default

[Murat SULUHAN · Accepted solution]

Hi Jerry

lvreduce command will help you

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

Best Regards
Murat

[David Bellamy]

Jerry if you have OnLineJFS look at the fsadm command.

[Jerry_109]

I ran the following command. Was it the wrong cmd to enter? :

lvreduce -L 4096 /dev/vg00/usr

##################################
root@fdhp31[/root]
# lvdisplay /dev/vg00/usr
--- Logical volumes ---
LV Name /dev/vg00/usr
VG Name /dev/vg00
LV Permission read/write
LV Status available/syncd
Mirror copies 0
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 4096
Current LE 512
Allocated PE 512
Stripes 0
Stripe Size (Kbytes) 0
Bad block on
Allocation strict
IO Timeout (Seconds) default

root@fdhp31[/root]
#
root@fdhp31[/root]
#
root@fdhp31[/root]
# lvdisplay -v /dev/vg00/usr | grep -i stale
root@fdhp31[/root]

[Murat SULUHAN]

Hi Jerry

There is no error
You entered
lvreduce -L 4096 /dev/vg00/usr

and now LV size as follows

LV Size (Mbytes) 4096

David fsadm is filesystem utility and it can't help this problem

Best Regards
Murat

[Sandman!]

>I ran the following command. Was it the wrong cmd to enter? :

>lvreduce -L 4096 /dev/vg00/usr

Since you extended /dev/vg00/usr from 500 to 625 LEs you should reduce it to the same size viz.,

-- Num of LEs before lvextend'ing.
# echo (4096000/(1024*8)) | bc
500
-- Reduce the lvol from 625 to 500 LEs.
# lvreduce -l 500 /dev/vg00/usr
OR
-- Shrink it in size from 5000 to 4000 Mbytes.
# lvreduce -L 4000 /dev/vg00/usr

~hope it helps

[James R. Ferguson]

Hi Jerry:

Since you enlarged the logical volume but not the filesystem within, simply 'lvreduce' the logical volume to its original size.

The logical volume is only a container for the filesystem in this case. While you increased the size of the container, you didn't increase its contents. Shrink the container to fit the contents.

Regards!

...JRF...