[linux-lvm] Stripes and PE's

[David Greaves]

I had a similar problem.

I fixed it by turning off contiguous
  http://www.redhat.com/archives/linux-lvm/2004-April/msg00050.html

Can't say anyone was particularly helpful about enlightening me <shrug>  :)

Maybe you could create a non-striped contiguous over a  striped md array?

David


Tyler wrote:

>I'm having problems creating a logical volume on a 4 disk SCSI volume group.
>I want to use the entire space as 1 LV that is striped, but can't seem to do
>it.
>
>I get an error telling me I don't have enough Physical Extents, when I
>clearly do.
>
>livecd root # vgdisplay
>  --- Volume group ---
>  VG Name               group
>  System ID
>  Format                lvm2
>  Metadata Areas        4
>  Metadata Sequence No  1
>  VG Access             read/write
>  VG Status             resizable
>  MAX LV                255
>  Cur LV                0
>  Open LV               0
>  Max PV                255
>  Cur PV                4
>  Act PV                4
>  VG Size               13.91 GB
>  PE Size               4.00 MB
>  Total PE              3560
>  Alloc PE / Size       0 / 0
>  Free  PE / Size       3560 / 13.91 GB
>  VG UUID               DjxWid-oxqx-zol9-Lu8a-CO94-AsBn-c7k3le
>
>livecd root # lvcreate -i4 -I16 -l3560 -nstorage group
>  Insufficient allocatable extents suitable for striping for logical volume
>storage: 3560 required
>livecd root # lvcreate -i4 -I16 -l3000 -nstorage group
>  Insufficient allocatable extents suitable for striping for logical volume
>storage: 3000 required
>
>Even if I try to use less space then it says I have, it still wont let me.
>
>I've had this error before, but never found a solution.  I also have not
>found the solution on the mailing list archives either.  I can create a
>contiguous LV, but without striping.  I'd like to have it striped if I
>could.
>
>What am I doing wrong?
>
>Tyler
>
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>
>  
>