topic Re: Missing disk space in Operating System - HP-UX

Missing disk space

Abhijith Madhav — Tue, 18 Dec 2007 06:10:44 GMT

I have created a single logical volume encompassing two disks. The total disk space available is about 65GB as shown in the output of the 'vgdisplay' output below. However on mounting the creating volume I find that I can get only 31 GB of diskspace(output of df command).

Could someone help me get to know where the remaining disk space is and how do I recover it back??

Attempts to 'lvextend' failed obviously as all PE's are marked as allocated.

"
#vgdisplay -v /dev/vg01
--- Volume groups ---
VG Name /dev/vg01
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 2
Open LV 1
Max PV 16
Cur PV 2
Act PV 2
Max PE per PV 8683
VGDA 4
PE Size (Mbytes) 8
Total PE 8680
Alloc PE 8680
Free PE 0
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

--- Logical volumes ---
LV Name /dev/vg01/felogs
LV Status available/syncd
LV Size (Mbytes) 65440
Current LE 8180
Allocated PE 8180
Used PV 2

--- Physical volumes ---
PV Name /dev/dsk/c3t2d0
PV Status available
Total PE 4340
Free PE 0
Autoswitch On

PV Name /dev/dsk/c2t1d0
PV Status available
Total PE 4340
Free PE 0
Autoswitch On

#df -k /dev/vg01/felogs
(/dev/vg01/felogs ) : 31031384 total allocated Kb
25864912 free allocated Kb
5166472 used allocated Kb
16 % allocation used

"

Re: Missing disk space

Kapil Jha — Tue, 18 Dec 2007 06:18:34 GMT

this is your new installation or its old running???
Can you check in lsof is some big file is open??? if it is restart that process.
Hope this help.
Kapil

Re: Missing disk space

Jeeshan — Tue, 18 Dec 2007 06:19:00 GMT

Can you give me the command you used to create vg,lv ?

I guess you miss some parameters while creating the LV.

Re: Missing disk space

Aneesh Mohan — Tue, 18 Dec 2007 06:21:38 GMT

Hi Abijith,

the below o/p shows the lv allocation is proper

--- Logical volumes ---
LV Name /dev/vg01/felogs
LV Status available/syncd
LV Size (Mbytes) 65440
Current LE 8180
Allocated PE 8180
Used PV 2

So can you do..umount ,extendfs,mount

Thanks,
Aneesh

Re: Missing disk space

Abhijith Madhav — Tue, 18 Dec 2007 07:03:40 GMT

The extendfs helped. I now have all my diskspace available. Thank you. As Ahsan suggests this might have to do with the way I initially created the lv long back. Do you know of any other reason??

"
#extendfs /dev/vg01/felogs
#extendfs -q /dev/vg01/felogs
Disk size is 67010560
#df -k /dev/vg01/felogs
(/dev/vg01/felogs ) : 66045308 total allocated Kb
60876652 free allocated Kb
5168656 used allocated Kb
7 % allocation used
"

Thanks to Kapil and Ahsan for their suggestions too.

Kapil - I did not have any process which had a big file open

Ahsan - Created the logical volume long before. Don't remember the parameters. It was a bit of a trail and error method and it might be the cause.

Re: Missing disk space

Jeeshan — Tue, 18 Dec 2007 08:02:04 GMT

Sometimes it seems that if the vgcreate option you don't specify large file optionas as well as lvcreate, it might be problem for extending lasrge disk space.

Happy to see, your problem has solved.

Re: Missing disk space

Torsten. — Tue, 18 Dec 2007 08:15:05 GMT

"largefiles" has nothing to do with vgcreate or lvcreate.

I'm sure somebody created that LVOL with a size of around ~30GB in the past and extended this LVOL to the larger size later - without running lvextend. For this reason the filesystem was still at the original size.

Re: Missing disk space

Abhijith Madhav — Tue, 18 Dec 2007 09:33:48 GMT

Found solution