On Tue 2017-07-25 14:02:25, Theodore Ts'o wrote: > On Tue, Jul 25, 2017 at 03:46:04PM +0200, Pavel Machek wrote: > > > > Is there some field in ext2 superblock that changes every time > > filesystem is changed? Is mtime changed by fsck/badblocks/...? > > No, there isn't. If we were writing the superblock every time the > file system is changed it would be ***extremely*** flash unfriendly. > It would also be a scalability bottleneck, it would cause us to pay an > extra HDD seek, etc. So it's a really bad Bad BAD idea, and so we > don't do it. Ok, I did not mean "every time" when I said "every time". That would be too heavy. I mean... is there something changed by the regular mount (like mtime) plus by operations like fsck and badblocks? In particular, does fsck change mtime when it writes to the filesystem? Thanks, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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