Subject: Re: Maximum block dev size / filesystem size
From: Aaron Peterson <aaron@alpete.com>
Reply-To: aaron@alpete.com
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Date: Fri, 08 Oct 2004 10:13:53 -0400
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On Thu, 2004-10-07 at 15:39, Alan Cox wrote:
> On Iau, 2004-10-07 at 21:19, Aaron Peterson wrote:
> > I work for a company with a 15 TB SAN.  All opinions about the
> > disadvantages of creating really large filesystems aside, I'm trying to
> > find out what is the maximum filesystem size we can allocate on our SAN
> > that a linux box (x86) can really use.
>=20
> For 2.4.x 1Tb (2Tb works for some devices but its a bit variable)
>=20
> > What I can't seem to find anywhere is whether the 2 TB block device
> > limit has improved/grown with 2.6 kernels (on x86 hardware).  Perhaps
> > I've looked in the wrong places, but I haven't found anything.
>=20
> 2.6 fixed this problem although it appears not for some specialist
> cases. Last time I checked LVM logical volumes over 2Tb were reported
> problematic.

I've read that the other main difficulty besides block device size
limits is problems with the ext2 management tools themselves.  So, how
would you rate my chances of using a 2.6 kernel with XFS (and xfs
management tools of course) with a 5 TB filesystem?  Probably not a well
tested scenerio to say the least...

Aaron

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