Re: [RFC][PATCH 0/2]Extend ext3 filesystem limit from 8TB to 16TB

[Andi Kleen]

Mingming Cao <cmm@xxxxxxxxxx> writes:

> On Thu, 2006-03-30 at 10:40 -0700, Andreas Dilger wrote:
> > On Mar 29, 2006  17:38 -0800, Mingming Cao wrote:
> > > Have verified these two patches on a 64 bit machine with 10TB ext3
> > > filesystem, fsx runs fine for a few hours. Also testes on 32 bit machine
> > > with <8TB ext3.
> > 
> > Have you done tests _near_ 8TB with a 32-bit machine, even without these
> > patches?
> No I haven't. The >8TB right now is attached to a 64 bit machine, but we
> should able to move it to a 32 bit machine.

If you use XFS or JFS as backing fs you can use a holey loop device
to simulate it.  When I tried this last time JFS worked better for me.
XFS doesn't seem to like that many extents as will be created by 
mkfs.ext2.

-Andi
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