Hi, Jorge. I think one possible weak link is the scsi adapter and/or raid
device. SL41 has all of the software angles covered (large raw devices;  
large filesystems; large scsi addresses), but I think there is still a
chance that your scsi layer cannot address more than 2 TB per LUN. If the
problem is in the adapter, the solution might be as simple as switching to
one of the adapters known to support the 64-bit addressing. If the problem
is an embedded raid controller, you might be forced to define several
<=2TB hardware arrays, and then use a software raid0 or concat to combine
these.

-Jan

On Thu, 18 Aug 2005, Connie Sieh wrote:

> Date: Thu, 18 Aug 2005 09:00:34 -0500 (CDT)
> From: Connie Sieh <[log in to unmask]>
> To: "Jorge Izquierdo (UAM)" <[log in to unmask]>
> Cc: [log in to unmask]
> Subject: Re: SL 4.0/4.1 x86_64 support for large filesystems
> 
> Jorge,
> 
> On Thu, 18 Aug 2005, Jorge Izquierdo (UAM) wrote:
> 
> > Hi everybody, I'm getting a bit desperate with this subject. 
> > 
> > I've updated my SL to version 4.1 and I've obtained the same results as
> > with 4.0. None of the suggestions from yesterday have resolved my issue
> > and I can't get reflected de 5TB when I create the filesystem neither
> > with SL 4.0 nor with 4.1
> > 
> > As I said before, I can't use parted to create my partitions (I sent my
> > problem with sector size of 2048 bytes not supported by parted), and
> > using fdisk or cfdisk I can only obtain a 4TB partition but the real
> > problem is that when creating the filesystem (with mke2fs -b 4096) and
> > mounting it, it appears to be a 2 TB size partition (either with Sl 4.0
> > or S.L 4.1)
> > 
> > Anyone has achieved such large partitions working properly with SL??
> 
> We have.
> 
> > 
> > Thanks for your help
> > 
> > Jorge
> > 
> > 
> -Connie Sieh
>