Date: Sat, 31 Jan 1998 16:52:51 -0600 From: Chris Csanady <ccsanady@friley585.res.iastate.edu> To: "Alton, Matthew" <Matthew.Alton@anheuser-busch.com> Cc: fs@FreeBSD.ORG Subject: Re: Filesystem hacking Message-ID: <199801312252.QAA10636@friley585.res.iastate.edu> In-Reply-To: Your message of "Fri, 30 Jan 1998 14:52:27 CST." <31B3F0BF1C40D11192A700805FD48BF9C33287@STLABCEXG011>
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>I have decided to code up an IBM-style journaling filesystem >(jfs) with maximum portability for free unices. While I'm at it >I had might as well have the clean-bits map to a PP/extent >disk arrangement which will act as a useful abstraction for a >Logical Volume Manager / Veritas -esque disk management >system which I also find interesting enough to code up. This is quite nice to hear, I would love to see a journaling file system for FreeBSD. If you were to base it on JFS, you might want to talk to Terry as I believe that he has written a read only version. If you were to make it compatible with as existing fs, I think that SGI's XFS would be the way to go. I think that it is considerably better than JFS. See the white paper.. http://www.sgi.com/Technology/xfs-whitepaper.html This makes me curious though--how would one go about creating an fs like jfs, ntfs, hfs or something? Do you need to reverse engineer the whole thing? Chris Csanady
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