How to "recover" unused disk space

[daihard]

Hi.

I have a HP-UX 11.23 workstation with a 36GB hard disk. It is all under /dev/vg00. SAM shows that vg00 does have 36 GB.

However, if I check the file system (ie by running "df -k"), it shows only a total of 9GB on the disk.

----------------------------------------------
# df -lk
/home (/dev/vg00/lvol5 ) : 24456 total allocated Kb
34 % allocation used
/opt (/dev/vg00/lvol6 ) : 2438016 total allocated Kb
83 % allocation used
/tmp (/dev/vg00/lvol4 ) : 203344 total allocated Kb
4 % allocation used
/usr (/dev/vg00/lvol7 ) : 3667440 total allocated Kb
62 % allocation used
/var (/dev/vg00/lvol8 ) : 1559392 total allocated Kb
44 % allocation used
/stand (/dev/vg00/lvol1 ) : 269032 total allocated Kb
14 % allocation used
/ (/dev/vg00/lvol3 ) : 407968 total allocated Kb
47 % allocation used
----------------------------------------------

Apparently, there's about 25GB disk space on the drive unused.

My question is, is there a way to recoup it and add it to an existing partition? I wouldn't mind re-installing the OS if there's no other way, but I'd like to ask for your expert opinions first.

Thanks!
Dai

[SKR_1]

Paste the output of
1. vgdisplay -v vg00
2. ioscan -fnC disk
3. uname -a

Have you taken the reboot of machine?


Thanks

SKR

[Pedro Cirne]

Hi,

You can only shrink filesystem/lvolvs if you have OnLineJFS installed.

If you want to resize all filesystems without OnlineJFS one option is to make a "make_tape_recovery", boot from the tape, choose "Advanced Mode" and then you can resize the partitions.

Pedro

[Torsten.]

Unless you have 25GB of swap you should have plenty of free space.

# vgdisplay -v vg00

will tell you.

[daihard]

Thanks for the quick replies, guys. Here's the information requested:

# vgdisplay -v vg00
--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 8
Open LV 8
Max PV 16
Cur PV 1
Act PV 1
Max PE per PV 4350
VGDA 2
PE Size (Mbytes) 8
Total PE 4340
Alloc PE 1182
Free PE 3158
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

--- Logical volumes ---
LV Name /dev/vg00/lvol1
LV Status available/syncd
LV Size (Mbytes) 304
Current LE 38
Allocated PE 38
Used PV 1

LV Name /dev/vg00/lvol2
LV Status available/syncd
LV Size (Mbytes) 1024
Current LE 128
Allocated PE 128
Used PV 1

LV Name /dev/vg00/lvol3
LV Status available/syncd
LV Size (Mbytes) 400
Current LE 50
Allocated PE 50
Used PV 1

LV Name /dev/vg00/lvol4
LV Status available/syncd
LV Size (Mbytes) 200
Current LE 25
Allocated PE 25
Used PV 1

LV Name /dev/vg00/lvol5
LV Status available/syncd
LV Size (Mbytes) 24
Current LE 3
Allocated PE 3
Used PV 1

LV Name /dev/vg00/lvol6
LV Status available/syncd
LV Size (Mbytes) 2384
Current LE 298
Allocated PE 298
Used PV 1

LV Name /dev/vg00/lvol7
LV Status available/syncd
LV Size (Mbytes) 3592
Current LE 449
Allocated PE 449
Used PV 1

LV Name /dev/vg00/lvol8
LV Status available/syncd
LV Size (Mbytes) 1528
Current LE 191
Allocated PE 191
Used PV 1


--- Physical volumes ---
PV Name /dev/dsk/c2t6d0
PV Status available
Total PE 4340
Free PE 3158
Autoswitch On


# ioscan -fnC disk
Class I H/W Path Driver S/W State H/W Type Description
=======================================================================
disk 0 10/0/14/0.0.0 sdisk CLAIMED DEVICE HL-DT-STDVD-ROM GDR8160B
/dev/dsk/c0t0d0 /dev/rdsk/c0t0d0
disk 1 10/0/15/0.6.0 sdisk CLAIMED DEVICE HP 36.4GST336706LC
/dev/dsk/c2t6d0 /dev/rdsk/c2t6d0


# uname -a
HP-UX hpux23 B.11.23 U 9000/785 2008033668 unlimited-user license


The output of vgdisplay seems to tell me that there is in fact unallocated space...

Thanks,
Dai

[Torsten.]

Yes, there is:

PE Size (Mbytes) 8
Total PE 4340
Alloc PE 1182
Free PE 3158

Free PE * PE Size
3158 * 8MB = 25GB free

Check with "bdf" if one of your LVOLs needs some space in future.

[daihard]

Hello Torsten.

# bdf -l
Filesystem kbytes used avail %used Mounted on
/dev/vg00/lvol3 409600 193088 214880 47% /
/dev/vg00/lvol1 298928 37968 231064 14% /stand
/dev/vg00/lvol8 1564672 689312 870080 44% /var
/dev/vg00/lvol7 3678208 2291232 1376208 62% /usr
/dev/vg00/lvol4 204800 8504 194840 4% /tmp
/dev/vg00/lvol6 2441216 2026536 411480 83% /opt
/dev/vg00/lvol5 24576 8488 15968 35% /home


This is what our system looks like. Seems to me that /usr, /var and /opt all need some more space. We do not need /home because we use NIS which sets the users home directories on an NFS drive.

What do you think?

Thanks again!
Dai

[Torsten.]

If you stay with your setup, currently you are fine.
But if you want to install software or large patch bundles (probably needed) consider to assign some more space to them.

[Michael Steele_2]

Hi Dai:

/opt @ 83% is the only file system I'm concerned about right now.

Try this command to see if you have online JFS, and if you do, then you can increase without unmounting.

fsadm -F vxfs -D -E /opt

[Tim Nelson]

BTW, unless you answer yes to OnlineJFS maintenance of vg00 filesystems ( /, /usr, /var, /opt ) typically needs to be done with the server in single user mode.

And even more typically needs to be done using an Ignite system recovery.