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Hello,
I have a server with four disks in an LVM volume group. I am wanting to replace this with a single 2TB drive, however all SATA ports are used by the disks. I need to remove one disk, install the new disk, and then transfer all content over...
This disk that I want to remove is /dev/sdc. This disk, unlike the others, has 2 partitions: a boot partition and an LVM partition that is part of the volume group. My intent is to purge /dev/sdc2 (the LVM partition) from the LVM volume group, shrink an LVM partition on another disk and use that for /boot, and then finally remove /dev/sdc.
But, I've run into a bit of a problem...
The LVM partition on /dev/sdc2 is less than 40G. I know for a fact that there is more free space than that on the other disks, but pvmove returns with an error that it doesn't have enough free space to move to content off:
$ pvmove /dev/sdc2
Password:
Insufficient free space: 9481 extents needed, but only 6544 available
Unable to allocate mirror extents for pvmove0.
Failed to convert pvmove LV to mirroredI don't understand why it can't just move whatever content resides on /dev/sdc2 to free space on the other disks. I might be doing something wrong, but can someone explain this?
Thanks!
Some info:
$ lvdisplay --maps
--- Logical volume ---
LV Name /dev/VolGroup00/lvolroot
VG Name VolGroup00
LV UUID 1ZdePr-hcnS-Ykzv-p99J-dfKV-4Ng1-r42Dt0
LV Write Access read/write
LV Status available
# open 1
LV Size 20.00 GiB
Current LE 5120
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:0
--- Segments ---
Logical extent 0 to 5119:
Type linear
Physical volume /dev/sdb1
Physical extents 0 to 5119
--- Logical volume ---
LV Name /dev/VolGroup00/lvolhome
VG Name VolGroup00
LV UUID HJ3qGb-ThzI-UDkI-kItC-ThPk-iiP4-LXe4eD
LV Write Access read/write
LV Status available
# open 1
LV Size 20.00 GiB
Current LE 5120
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:1
--- Segments ---
Logical extent 0 to 5119:
Type linear
Physical volume /dev/sdb1
Physical extents 5120 to 10239
--- Logical volume ---
LV Name /dev/VolGroup00/lvolswap
VG Name VolGroup00
LV UUID DXIpqt-op4c-1qfq-MB9C-sp0F-kSTa-g16QAF
LV Write Access read/write
LV Status available
# open 1
LV Size 1.00 GiB
Current LE 256
Segments 1
Allocation contiguous
Read ahead sectors auto
- currently set to 256
Block device 254:2
--- Segments ---
Logical extent 0 to 255:
Type linear
Physical volume /dev/sdc2
Physical extents 0 to 255
--- Logical volume ---
LV Name /dev/VolGroup00/lvolstorage
VG Name VolGroup00
LV UUID RTiGDD-0xoF-VX2v-QKcv-6MLZ-7mX8-J14aQQ
LV Write Access read/write
LV Status available
# open 1
LV Size 622.54 GiB
Current LE 159371
Segments 4
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:3
--- Segments ---
Logical extent 0 to 9224:
Type linear
Physical volume /dev/sdc2
Physical extents 256 to 9480
Logical extent 9225 to 11519:
Type linear
Physical volume /dev/sdb1
Physical extents 10240 to 12534
Logical extent 11520 to 40136:
Type linear
Physical volume /dev/sda1
Physical extents 0 to 28616
Logical extent 40137 to 159370:
Type linear
Physical volume /dev/sdd1
Physical extents 0 to 119233$ pvdisplay
--- Physical volume ---
PV Name /dev/sdb1
VG Name VolGroup00
PV Size 74.53 GiB / not usable 2.87 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 19079
Free PE 6544
Allocated PE 12535
PV UUID EM1AK2-UsBD-nTDj-52sZ-LpYW-rS5i-AEH4Vr
--- Physical volume ---
PV Name /dev/sdc2
VG Name VolGroup00
PV Size 37.04 GiB / not usable 2.89 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 9481
Free PE 0
Allocated PE 9481
PV UUID dwXCls-Ce4b-2Kjp-dgKE-NTOX-seCv-Q4jfiv
--- Physical volume ---
PV Name /dev/sda1
VG Name VolGroup00
PV Size 111.79 GiB / not usable 2.94 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 28617
Free PE 0
Allocated PE 28617
PV UUID 4hvcfl-1IWM-T1MB-3qjC-z342-rN4x-Qjm00u
--- Physical volume ---
PV Name /dev/sdd1
VG Name VolGroup00
PV Size 465.76 GiB / not usable 1.50 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 119234
Free PE 0
Allocated PE 119234
PV UUID opSi3p-EVRu-kqb2-u7Ni-ItVt-LTEj-RuhqZB$ sudo vgdisplay
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 4
Metadata Sequence No 21
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 689.11 GiB
PE Size 4.00 MiB
Total PE 176411
Alloc PE / Size 169867 / 663.54 GiB
Free PE / Size 6544 / 25.56 GiB
VG UUID nltb47-cx1W-oJb1-5rvA-ECgb-rcuX-ysP33iLast edited by XtrmGmr99 (2011-02-10 07:05:57)
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With all due respect - why don't you just buy a usb-enclosure (~$25), put your 2TB disk in that and then just copy ?
Surely, that must be easier than fiddling around with lvm ...
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I have one. That doesn't mean I should use it to workaround this problem. Knowledge is great, and a solution to this is much better in the long run. It will better prepare me for when I run into something like this again, unless of course there is no real way to get out of this predicament.
That and transferring 600+GB via USB2 would be a pain in the ass. <_< If the server had eSATA, that's another thing, but it doesn't. x_x
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Bump...
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I solved it.
I used the "Shrink logical volume" section on the LVM wiki, and then proceeded to pvmove. All is well. ^_^
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