[linux-lvm] 2 TB limit

Alasdair G Kergon agk at redhat.com
Wed May 12 21:32:44 UTC 2004

On Fri, Mar 26, 2004 at 10:16:44AM -0600, AJ Lewis wrote:
> The PE size limitation isn't present in lvm2 (The version of lvm that works
> in 2.6) if you use the native lvm2 format.  So you should be able to create
> larger than 2TB LVs with LVM2.  Just FYI.

As those of you monitoring the lvm-cvs mailing list may have noticed, 
I've added code to the LVM2 CVS tree to help people simulate large devices
for testing purposes on 2.6 kernels with the latest -udm patches.

  lvcreate --type zero -L16T vg  # Create 16TB 'zero' device
  lvcreate -s vg/lvol0 -L1G      # Create snapshot of it

Then use the snapshot as a 'sparse' device, in the example, supporting
upto 1GB of actual data.

[At some point I'll merge it into a one-line command with --type sparse]

NB There's been a lot of change in CVS recently (and more to come)
so I expect some new bugs to show up along with the new features:-(
agk at redhat.com

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