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cj_cheema 08-02-2009 09:58 AM

Error in extending LVM...
 
Hi

I am facing problem in extending of LVM it was successfully extended before but due to some reason i had to reduce it. Now when again I try to extend it it's give me an error message which is mentioned below please have a look and suggest me what should i do.

I issued below mentioned command:-
lvextend -L +8000M /dev/My_VolGroup00/Home02

And got below error:-

Insufficient free space: 250 extents needed, but only 161 available

Extending logical volume Home02 to 15.62 GB


Thanks & Regards
Charanjit Singh

EricTRA 08-02-2009 10:16 AM

Hi,

First thought is that there's not enough disk space available to extend your logical volume by 8Gb. You need to check before extending a logical volume if there are enough extents free. Using the commands pvdisplay, vgdisplay and lvdisplay should give you all the info you need.

Kind regards,

Eric

cj_cheema 08-03-2009 12:43 AM

If suppose there is no space so how could i free it because Its not allowing me to add in current logical volume. Without it i will not able to view that volumegroup.

Thanks
Charanjit

EricTRA 08-03-2009 12:47 AM

Can you post the output of pvdisplay, vgdisplay and lvdisplay commands?

Kind regards,

Eric

cj_cheema 08-03-2009 11:18 AM

Hi Eric

Below are the outputs of LVM commands, please have a look.

PVDISPLAY O/P

[root@station1 ~]# pvdisplay

--- Physical volume ---
PV Name /dev/sda2
VG Name My_VolGroup00
PV Size 7.90 GB / not usable 23.41 MB
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 252
Free PE 0
Allocated PE 252
PV UUID NmUdFi-GoCh-2IZQ-DSJE-tX3L-irbf-lgSlRH

--- Physical volume ---
PV Name /dev/sdb1
VG Name My_VolGroup00
PV Size 8.00 GB / not usable 29.35 MB
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 255
Free PE 0
Allocated PE 255
PV UUID gN1kff-O0pA-PKbo-R21i-WCMu-OXe1-CXoc4K

--- Physical volume ---
PV Name /dev/sdc1
VG Name My_VolGroup00
PV Size 8.00 GB / not usable 29.35 MB
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 255
Free PE 0
Allocated PE 255
PV UUID rOcEU0-Dz3G-9V8s-XLDo-IPb0-Tnaq-42yif1

--- Physical volume ---
PV Name /dev/sdd1
VG Name My_VolGroup00
PV Size 8.00 GB / not usable 29.35 MB
Allocatable yes
PE Size (KByte) 32768
Total PE 255
Free PE 161
Allocated PE 94
PV UUID fgENfH-wDur-YFsX-sHzz-PcBu-6Q0Y-IaRv2A


VGDISPLAY O/P


[root@station1 ~]# vgdisplay
--- Volume group ---
VG Name My_VolGroup00
System ID
Format lvm2
Metadata Areas 4
Metadata Sequence No 8
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 4
Open LV 4
Max PV 0
Cur PV 4
Act PV 4
VG Size 31.78 GB
PE Size 32.00 MB
Total PE 1017
Alloc PE / Size 856 / 26.75 GB
Free PE / Size 161 / 5.03 GB
VG UUID ZR9iIH-edSc-dqvZ-Z7Ln-6Ylu-lckz-qEDq0Q


LVDISPLAY O/P
[root@station1 ~]# lvdisplay
--- Logical volume ---
LV Name /dev/My_VolGroup00/Root01
VG Name My_VolGroup00
LV UUID qtN1JL-UnKA-hDko-yn9v-EZFI-CxkD-pyv5gH
LV Write Access read/write
LV Status available
# open 1
LV Size 9.75 GB
Current LE 312
Segments 2
Allocation inherit
Read ahead sectors 0
Block device 253:0

--- Logical volume ---
LV Name /dev/My_VolGroup00/Home02
VG Name My_VolGroup00
LV UUID elT5lL-YY2x-6ZyZ-lHVe-SQde-Tmb1-CF1PKf
LV Write Access read/write
LV Status available
# open 1
LV Size 7.81 GB
Current LE 250
Segments 2
Allocation inherit
Read ahead sectors 0
Block device 253:1

--- Logical volume ---
LV Name /dev/My_VolGroup00/Var03
VG Name My_VolGroup00
LV UUID cihuCk-9v7W-lUhI-1c3T-Wuqu-Fbuq-38mZ2C
LV Write Access read/write
LV Status available
# open 1
LV Size 8.19 GB
Current LE 262
Segments 2
Allocation inherit
Read ahead sectors 0
Block device 253:2

--- Logical volume ---
LV Name /dev/My_VolGroup00/Swap00
VG Name My_VolGroup00
LV UUID giGfaN-56vw-FdXG-lMXb-PWcB-uSfd-pB3stQ
LV Write Access read/write
LV Status available
# open 1
LV Size 1.00 GB
Current LE 32
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:3

Thanks & Regards
Charanjit

Disillusionist 08-03-2009 12:01 PM

You appear to have only 5152MB of free space on the disks.

You have three choices:
  1. Add another disk to the Volume Group; extend the volume group to include the new disk; extend the logical volume.
  2. Reduce one of the other logical volumes to free up space (risky, ensure you have a backup first) requires logical volume to be unmounted.
  3. Increase the logical volume to include the 161 free extents that you have available.

That's pretty much it.

EricTRA 08-03-2009 12:21 PM

Hello Charanjit,

I agree with Disillusionist. You only have those options listed. Your PE (Physical extent) size is 32Mb and you only have 161 PE's free on /dev/sdd1, the others are used up. So doing the math you get exactly what Disillusionist said, roughly 5Gb, and also those possibilities. I'd also go with option 1 or 3.

Kind reqards,

Eric


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