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Date:      Mon, 3 Apr 1995 10:49:04 -0500 (GMT-0500)
From:      "Serge A. Babkin" <babkin@hq.icb.chel.su>
To:        terry@cs.weber.edu (Terry Lambert)
Cc:        freebsd-hackers@FreeBSD.org
Subject:   Re: large filesystems/multiple disks
Message-ID:  <199504031549.KAA03988@hq.icb.chel.su>
In-Reply-To: <9504010658.AA08921@cs.weber.edu> from "Terry Lambert" at Mar 31, 95 11:58:47 pm

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> The main problem is that there needs to be file system support for the
> idea of additional disk space ...ie: one place where you can add
> things on.
> 
> This will work with IBM's JFS (obviously) or with a log structured
> file system, but precious little else.  UFS is particularly badly
> suited to doing this.  If you do what SPRITE does and shove all
> the inodes in one area and all of the data blocks in another, you
> can sort of do this for UFS.  The alternative is to preallocate
> a major large number of inodes in the first place (which is what I
> did) or to backup, remkfs the file system after adding the storage,
> and restore everything.

HP has UFS (they name it HFS) on LVM. I'm not shure but I think
that they use "cylinder group" as a quantum of space allocation.


		Serge Babkin

! (babkin@hq.icb.chel.su)
! Headquarter of Joint Stock Bank "Chelindbank"
! Chelyabinsk, Russia



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