Subject: Re: Maximum block dev size / filesystem size
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: aaron@alpete.com
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Date: Thu, 07 Oct 2004 20:39:24 +0100
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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.

For 2.4.x 1Tb (2Tb works for some devices but its a bit variable)

> 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.

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.

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