Re: 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

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