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Date:      Fri, 25 Jun 1999 18:22:19 -0700
From:      "Jordan K. Hubbard" <jkh@zippy.cdrom.com>
To:        Matthew Dillon <dillon@apollo.backplane.com>
Cc:        Aaron Smith <aaron-fbsd@mutex.org>, freebsd-hackers@FreeBSD.ORG
Subject:   Re: ufs/ffs resize? 
Message-ID:  <68859.930360139@zippy.cdrom.com>
In-Reply-To: Your message of "Fri, 25 Jun 1999 14:15:01 PDT." <199906252115.OAA95464@apollo.backplane.com> 

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>     to do actually it.  Personally, I think it would be a doable
>     project if someone wanted to have a go at it - to allow a filesystem
>     to be grown or shrunk on a cylinder-by-cylinder basis.  The only real 
>     complexity occurs when you are shrinking a filesystem - you have to locat
e
>     the inodes & indirect blocks associated with allocated data blocks
>     in the cylinder you are trying to remove in order to move the blocks.

To add to this, I'd also be inclined to see this done in the larger
context of writing at least a simplistic volume manager to contain
arbitrary filesystems, then extending UFS to support the concept of
dynamic resizing.  That way you could extend (the most common request)
a ufs partition much more flexibly across multiple partitions or
disks, that being what people are *really* asking for when they cry
for a resizable UFS. :-)

- Jordan


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