Hi Alan, Alan M Wright pÃÅ¡e v pá 30. 11. 2007 v 18:27 -0800: > Jan Senolt wrote: > > Hello, > > I would like to propose a new Open Solaris project called "Ext2 filesystem" > > providing ext2 filesystem interoperability capabilites for OpenSolaris. > > > > Ext2 filesystem (or Second Extended Filesystem) is the standard filesystem > > for GNU/Linux and was ported to another operating systems too. Although > > ext2 is not a journaling file system, its successor, ext3, provides > > journaling and is almost completely compatible with ext2. The initial > > implementation will not perform logging from ext3. Support from logging can > > be added later. > > > > This project will be initiated by Jan Senolt. > > > > This project is based on public documentation of ext2 only and the code > > will be released under CDDL license. > > > > This project will be associated with the Storege Community. The proposed > > leaders will be Jan Senolt. > > I would recommend that, at a minimum, this proposal include > journaling. Some form of journaling or enhanced data > integrity guarantee is pretty much a requirement for file > systems now. > > If you include journaling during the initial implementation, > it will almost certainly be easier (technically) and lower > risk than adding it later. And it avoids a potential > on-disk format change later, which is always a good thing. >
ext3 as successor of ext2 didn't change on-disk format a lot, it is even possible to force mounting of ext3 as ext2. And future fork to ext3 is only depending on brain&manpower :-) > Is the plan to support the creation of ext file systems, > which would require utilities to do so, or just to mount > and work on existing ext file systems? > As supervisor of the master thesis I requested only filesystem driver and mount utility. If somebody will need mkext2fs and fsck.ext2, he could recompile needed GNU utilities for it probably. Best regards, Milan
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