Re: [linux-lvm] free space and no free PE

[Antoine <lists@chwing.com>]

you're right, I wrongly assumed that PE = space

thanks

Klaus Strebel wrote:

> Antoine schrieb:
>
>> Hi
>>
>> I'm trying to remove a PV from a VG but I'm unable to perform the 
>> pvmove because the free PE doesn't match the free space on the VG.. 
>> at all.
>
> Who do you come to this conlusion??? vgdisplay shows 677 free PE's and 
> the only free PE in your PV is 677 on /dev/sdb1. So what???
>
> The free PEs have nothing to do with the df output. You have to shrink 
> your filesystem (what might be not possible, not all fs's support 
> this) to get as much free PE's as your PV has.
>
> Ex.: You wanna remove /dev/sdb1, shrink your filesystem to (size - 
> 16.87 GB, or better less ;-) ), shrink your LV the same way, pvmove 
> the extends on the PV, remove the PV from the VG.
>
> Ciao
> Klaus
>
>>
>> check output below, anyone has a clue why ? and how to correct this ?
>>
>> pitch:~# df -h /mnt/test
>> Filesystem            Size  Used Avail Use% Mounted on
>> /dev/mapper/vg1-test   64G   16G   45G  27% /mnt/test
>> pitch:~#
>> pitch:~#
>> pitch:~# vgdisplay vg1
>>   --- Volume group ---
>>   VG Name               vg1
>>   System ID
>>   Format                lvm2
>>   Metadata Areas        3
>>   Metadata Sequence No  6
>>   VG Access             read/write
>>   VG Status             resizable
>>   MAX LV                0
>>   Cur LV                1
>>   Open LV               1
>>   Max PV                0
>>   Cur PV                3
>>   Act PV                3
>>   VG Size               67.64 GB
>>   PE Size               4.00 MB
>>   Total PE              17317
>>   Alloc PE / Size       16640 / 65.00 GB
>>   Free  PE / Size       677 / 2.64 GB
>>   VG UUID               V9T0P5-PCML-z92w-GZot-Utlt-7GFF-z83i99
>> pitch:~# pvmove --version
>>   LVM version:     2.01.04 (2005-02-09)
>>   Library version: 1.01.00-ioctl (2005-01-17)
>>   Driver version:  4.1.1
>>
>> pitch:~# pvdisplay
>>   --- Physical volume ---
>>   PV Name               /dev/sda1
>>   VG Name               vg1
>>   PV Size               16.87 GB / not usable 0
>>   Allocatable           yes (but full)
>>   PE Size (KByte)       4096
>>   Total PE              4318
>>   Free PE               0
>>   Allocated PE          4318
>>   PV UUID               64vFFO-7kRV-oAYa-6dxH-vLod-XClo-wX3h54
>>
>>   --- Physical volume ---
>>   PV Name               /dev/sdb1
>>   VG Name               vg1
>>   PV Size               16.87 GB / not usable 0
>>   Allocatable           yes
>>   PE Size (KByte)       4096
>>   Total PE              4318
>>   Free PE               677
>>   Allocated PE          3641
>>   PV UUID               tAGCYo-8wGA-Y1Nr-8d0T-Wn0d-k9PW-Nf5bYj
>>
>>   --- Physical volume ---
>>   PV Name               /dev/sdc1
>>   VG Name               vg1
>>   PV Size               33.91 GB / not usable 0
>>   Allocatable           yes (but full)
>>   PE Size (KByte)       4096
>>   Total PE              8681
>>   Free PE               0
>>   Allocated PE          8681
>>   PV UUID               ZYn0Lr-rVyB-9geT-pbfN-VQCg-vhcO-kHCYin
>>
>> pitch:~# lvdisplay
>>   --- Logical volume ---
>>   LV Name                /dev/vg1/test
>>   VG Name                vg1
>>   LV UUID                Bge5z0-EWMD-vnQs-a08Y-beJR-uyFO-dxg0sj
>>   LV Write Access        read/write
>>   LV Status              available
>>   # open                 1
>>   LV Size                65.00 GB
>>   Current LE             16640
>>   Segments               5
>>   Allocation             contiguous
>>   Read ahead sectors     0
>>   Block device           254:1
>
>
>