[linux-lvm] questions

[Andreas Dilger]

Ragnar Kj_rstad writes:
> Is there a limit for the maximum size of a LVM diskgroup?
> (internally in LVM-code, or because of other limits in the kernel)
> The 2TB (1 TB) maximum devicesize in the linux-kernel doesn't apply, does
> it?

Yes, even LVM has the 2TB limit at this point.  This is because LVM
presents itself to the rest of the kernel as a block device (just like
any other), so the kernel 2TB limit for block devices still holds.

Heinz talked about allowing LVM to have PAGE_SIZE (4k) blocks (unlike
the rest of the kernel, which uses 512 byte blocks) so it may be possible
to go up to 16TB with LVM without a huge amount of kernel redesign.

Cheers, Andreas
-- 
Andreas Dilger  \ "If a man ate a pound of pasta and a pound of antipasto,
                 \  would they cancel out, leaving him still hungry?"
http://www-mddsp.enel.ucalgary.ca/People/adilger/               -- Dogbert