[linux-lvm] Expanded virtual disk for LVM: missing space? or free space? or no space?
Ogal Finklestein-Birl
ogal.finklestein at gmail.com
Thu Mar 13 21:58:07 UTC 2014
Greetings gurus:
I do not deal with LVM on a daily basis, and I think my note-taking of
previous LVM commands needs to be polished.
== Background ==
Have a VM with 2 virtual disks, 30G (LVM only on 3rd partition) and 65G
(all LVM) respectively.
A single VG on the server: VolGroup00; four LV's: LogVol00 to 03
== Problem ==
The 71G /usr/local (VolGroup00-LogVol02) hit 100%
I shut the server down and increased the 65G virtual disk up to 295G
(+230G) -- the thought process: take /usr/local from 71G to ~300G.
Booted into single and fdisk'ed a new /dev/sdb2
/dev/sda3 4298 30720 27057152 8e Linux LVM
/dev/sdb1 1 8485 68155731 83 Linux
/dev/sdb2 8486 38509 241167780 83 Linux
Consulted my notes and did the following:
pvcreate /dev/sdb2
umount -vv /usr/local
vgextend VolGroup00 /dev/sdb2
lvextend -L 229.99G /dev/mapper/VolGroup00-LogVol02
e2fsck -f /dev/mapper/VolGroup00-LogVol02
resize2fs /dev/mapper/VolGroup00-LogVol02
mount -vv /usr/local
df -h
/dev/mapper/VolGroup00-LogVol02 227G 68G 148G 32% /usr/local
My confusion came in when I saw 227G total and not 300G.
My suspicion was confirmed with pvdisplay -s (and pvs)
Device "/dev/sda3" has a capacity of 0
Device "/dev/sdb1" has a capacity of 0
Device "/dev/sdb2" has a capacity of 71.83 GiB
But I am confused even further; I thought pvdisplay was referring to the
physical disks, but fdisk does not show a missing 71G for /dev/sdb2
pvs
PV VG Fmt Attr PSize PFree
/dev/sda3 VolGroup00 lvm2 a-- 25.80g 0
/dev/sdb1 VolGroup00 lvm2 a-- 65.00g 0
/dev/sdb2 VolGroup00 lvm2 a-- 229.99g 71.83g
vgs
VG #PV #LV #SN Attr VSize VFree
VolGroup00 3 4 0 wz--n- 320.79g 71.83g
== Questions ==
Where did I go wrong, or did I go wrong?
It obviously seems like I am missing 71G, but am I missing it and how do I
go about reclaiming it?
== Additional data ==
pvdisplay
--- Physical volume ---
PV Name /dev/sda3
VG Name VolGroup00
PV Size 25.80 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 6605
Free PE 0
Allocated PE 6605
--- Physical volume ---
PV Name /dev/sdb1
VG Name VolGroup00
PV Size 65.00 GiB / not usable 2.33 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 16639
Free PE 0
Allocated PE 16639
--- Physical volume ---
PV Name /dev/sdb2
VG Name VolGroup00
PV Size 230.00 GiB / not usable 3.41 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 58878
Free PE 18389
Allocated PE 40489
vgdisplay -v
Finding all volume groups
Finding volume group "VolGroup00"
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 3
Metadata Sequence No 9
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 4
Open LV 4
Max PV 0
Cur PV 3
Act PV 3
VG Size 320.79 GiB
PE Size 4.00 MiB
Total PE 82122
Alloc PE / Size 63733 / 248.96 GiB
Free PE / Size 18389 / 71.83 GiB
--- Logical volume ---
LV Path /dev/VolGroup00/LogVol01
LV Name LogVol01
VG Name VolGroup00
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 5.86 GiB
Current LE 1500
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Logical volume ---
LV Path /dev/VolGroup00/LogVol00
LV Name LogVol00
VG Name VolGroup00
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 7.32 GiB
Current LE 1875
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/VolGroup00/LogVol03
LV Name LogVol03
VG Name VolGroup00
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 5.78 GiB
Current LE 1480
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Path /dev/VolGroup00/LogVol02
LV Name LogVol02
VG Name VolGroup00
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 229.99 GiB
Current LE 58878
Segments 3
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:3
--- Physical volumes ---
PV Name /dev/sda3
PV Status allocatable
Total PE / Free PE 6605 / 0
PV Name /dev/sdb1
PV Status allocatable
Total PE / Free PE 16639 / 0
PV Name /dev/sdb2
PV Status allocatable
Total PE / Free PE 58878 / 18389
lvdisplay -m
--- Logical volume ---
LV Path /dev/VolGroup00/LogVol01
LV Name LogVol01
VG Name VolGroup00
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 5.86 GiB
Current LE 1500
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Segments ---
Logical extent 0 to 1499:
Type linear
Physical volume /dev/sda3
Physical extents 0 to 1499
--- Logical volume ---
LV Path /dev/VolGroup00/LogVol00
LV Name LogVol00
VG Name VolGroup00
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 7.32 GiB
Current LE 1875
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Segments ---
Logical extent 0 to 1874:
Type linear
Physical volume /dev/sda3
Physical extents 1500 to 3374
--- Logical volume ---
LV Path /dev/VolGroup00/LogVol03
LV Name LogVol03
VG Name VolGroup00
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 5.78 GiB
Current LE 1480
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Segments ---
Logical extent 0 to 1479:
Type linear
Physical volume /dev/sda3
Physical extents 3375 to 4854
--- Logical volume ---
LV Path /dev/VolGroup00/LogVol02
LV Name LogVol02
VG Name VolGroup00
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 229.99 GiB
Current LE 58878
Segments 3
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:3
--- Segments ---
Logical extent 0 to 1749:
Type linear
Physical volume /dev/sda3
Physical extents 4855 to 6604
Logical extent 1750 to 18388:
Type linear
Physical volume /dev/sdb1
Physical extents 0 to 16638
Logical extent 18389 to 58877:
Type linear
Physical volume /dev/sdb2
Physical extents 0 to 40488
Many thanks in advance!
Ogal
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