On Wed, Mar 31, 2004 at 01:33:23PM -0600, Alexander Lazarevich wrote:
> Hi,
>
> Using lvm-1.0.3-15 on RHEL3-AS, kernel 2.4.21-9.0.1.ELsmp.
>
> I've got two SCSI devices attached to the system, each one is 1.74TB in
> size. I want to make a single ext3 filesystem out of those devices. So I'm
> using LVM to create a logical volume (3.48TB) out of those devices:
>
> Even though I set the PE size to 512MB ("vgcreate -s512 /dev/sda
> /dev/sdb"), and I can see the VG size is correct (3.18TB), the maximum LV
> size is still 2TB:
>
> #vgdisplay
> [root@xxxxxx root]# vgdisplay
> --- Volume group ---
> VG Name test-vg
> VG Access read/write
> VG Status available/resizable
> VG # 0
> MAX LV 256
> Cur LV 0
> Open LV 0
> MAX LV Size 2 TB
> Max PV 256
> Cur PV 2
> Act PV 2
> VG Size 3.18 TB
> PE Size 512 MB
> Total PE 6510
> Alloc PE / Size 0 / 0
> Free PE / Size 6510 / 3.18 TB
> VG UUID dU1Xjg-w0Y4-aeh2-yU4l-Wo7g-Lewx-r6l1cT
>
> Later in the man pages, it says something briefly about a 2TB block device
> limit in linux 2.4:
>
> #man vgcreate
> "There is also (as of Linux 2.4) a kernel limitation of 2TB per block
> device."
>
> Is an LV a "block device" and is this why I can't seem to create an LV
> bigger than 2TB? If this is the problem, then LVM2 wouldn't even help,
> would it? Is it really true that no one can create a non-softwareRAID
> filesystem bigger than 2TB on linux 2.4? That just can't be true. Can it?
It can. That limitation is gone in Linux 2.6.
>
> Thanks in advance,
>
> Alex
> --- ---
> Alex Lazarevich | Systems Administrator | Imaging Technology Group
> Beckman Institute | University of Illinois | www.itg.uiuc.edu
> --- ---
>
> _______________________________________________
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> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
--
Regards,
Heinz -- The LVM Guy --
*** Software bugs are stupid.
Nevertheless it needs not so stupid people to solve them ***
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Heinz Mauelshagen Red Hat GmbH
Consulting Development Engineer Am Sonnenhang 11
56242 Marienrachdorf
Germany
Mauelshagen@RedHat.com +49 2626 141200
FAX 924446
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