Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!gem.mps.ohio-state.edu!ginosko!uunet!visenix!beattie From: beattie@visenix.UUCP (Brian Beattie) Newsgroups: comp.os.minix Subject: Re: Large Disks Keywords: disks Message-ID: <315@visenix.UUCP> Date: 3 Oct 89 11:58:35 GMT References: <233@vsserv.scri.fsu.edu> <3463@ast.cs.vu.nl> Reply-To: beattie@visenix.UUCP (Brian Beattie) Organization: /usr/news/organization Lines: 25 In article <3463@ast.cs.vu.nl> ast@cs.vu.nl (Andy Tanenbaum) writes: > >An obvious question is how do people convert? One thought is that you >first tar your entire file system to diskette in tar format (or PAX or >whatever we have at that time). Then you build a new V2.0 MINIX boot >diskette, turn the computer off, and reboot. Next step is mkfs on your >disk, erasing everything, and setting up a new file system with 64-byte >i-nodes. Then you read back the tar diskettes. I don't think I need >explain what happens if you make a mistake somewhere. > >Andy Tanenbaum (ast@cs.vu.nl) I would suggest that the new kernel and bootdisk be able to read both types of inodes. This could be done by switching on the Magic number of the filesystem. This approach has several benefits, it would be possible to use the smaller inodes on a floppy, the migration could be done one filesystem at a time. The amount of extra code necessary should be very small it is only the reading of the inode into the incore structure that is different. -- Do Not meddle in the | Brian Beattie (703)471-7552 affairs of Wizards, | 11525 Hickory Cluster, Reston, VA. 22090 for you are crunchy | beattie@visenix.UU.NET and go well with catsup| ...uunet!visenix!beattie