On Thu, 2007-05-17 at 18:11 +0200, Jan Kara wrote: > But me (and several other people > independently as I've learnt recently) have written some tools which > should result in something useful. If you're interested, you can join > prefetch-devel@xxxxxxxxxxxxxxxx - it's led by one guy who is doing > defrag and stuff as his google summer of code project. Is this different from the ext4/extent-based defrag patch that's been mentioned on this list? > > *An implementation of an ext* filesystem driver can work with any > > ext2/3/4 filesystem as long as it supports the necessary revision > > (GOOD_OLD_REV or DYNAMIC_REV) and feature flags set in the filesystem. > Not sure what you mean here... The "ext2 filesystem"/"ext3 filesystem"/"ext4 filesystem" terminology was confusing to me when I first started reading about them. In my mind, it implied that those three filesystems were more different than they actually are. I think it would be more accurate to say that they are all essentially the same filesystem, and that any filesystem driver that can mount a given filesystem can mount any other ext2/3/4 filesystem of the same revision with the same feature flags set. I was asking for confirmation of this assumption, but I've since found a lot of really good documentation that has cleared up a lot of things. Thanks, Eric
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