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Date:	Tue, 5 Jun 2001 21:58:27 PDT
From:	Peter Skye <pskye@peterskye.com >
Reply-To:	scoug-help@scoug.com
To:	scoug-help@scoug.com
Subject:	SCOUG-Help: LVM & System Cmdr.

Content Type: text/plain

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Steven Levine wrote:
>
> >IBM is full of boneheads.
>
> Calling them names doesn't change anything.

Maybe -- but now I feel better. :))

> >You mean you can't access JFS from different platforms?
>
> Read up a little more on the history of
> LVM/JFS and you will understand why.
> ...
> I'm sure they are very similar internally. I don't
> expect interoperability at this point in time.

System Commander's first task will have to be LVM support so it can boot
on an LVM system.

I'd bet that LVM is simpler than JFS; I don't know what options LVM
offers but it appears to be a simple table of disk extents with some
lookup code. I s'pose I oughta read the Redbooks.

I'm very surprised that LVM isn't compatible across platforms (AIX,
OS/2, Linux). It makes no sense for LVM to _not_ be cross-platform
compatible.

As for JFS, it doesn't make any sense for it to not be cross-platform
compatible either. I don't know AIX and I'm only a read-about-it on
Linux, but I thought Linux (and *nix?) used the same concept of
"partitions" as DOS and OS/2. Thus, why wouldn't the JFS developers try
to make the partitions compatible? There would be less development
time, fewer bugs, lower cost, cheaper-faster-better.

- Peter

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