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Since I'm pretty sure the block layer is below us and since we're dealing
with physical devices that are less than a TB, why would we apply fixes to
the block layer?

I guess what we really need to know is how is LVM called from above? What is
the data structure that is passed? I guess this is another reason for me to
have a linux box here, or at least the source code. ;-)

In the old days, on AIX, the block driver was passed a structure called a
buf structure. That structure had the device stuff in it for the IO. It
contained the mem address of where to put/get the data, which device it was
on, and the offset on the device. Does Linux use a similar mechanism?

P

----- Original Message -----
From: "June Mullins" <junemullins, earthlink dot net>
To: <antera, cryptofreak dot org>
Sent: Tuesday, November 06, 2001 2:09 PM
Subject: Re: terabyte limit


> So, from the note, it sounds like we would just have to apply the 64 bit
> patch to
> the generic block layer (and to lvm, if we wind up using it) to get
> around the 1 or
> 2 Tb limit.  However see the link in the referenced note to the next
> note about
> LVM extent size - that might be something to worry about if we use lvm
> rather than roll our own.
>
>
>
>            June
>
>
> Don jessup wrote:
>
> >   Here is a link to some information on the limit
> >   size.
> > http://lists.sistina.com/pipermail/linux-lvm/2001-September/008678.html
> >
> >
> > __________________________________________________
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> >
> >
>
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