On Tue, Apr 01, 2014 at 09:36:22PM +0800, Zhang Cong wrote: > Hi Theodore*,* > > Why fsck does not check hard disk, even when unconditional power > loss, for both debian 6 and debian 7. > Can I mark that as the disk data is safe and no need to fsck?
It's up to each file system to decide whether it needs to do a full check or not. Most modern file systems have techniques which avoid needing to do a full check after a power failure: http://en.wikipedia.org/wiki/Journaling_file_system In the case of ext 3/4, the e2fsck program (aka /sbin/fsck.ext[34]) is actually responsible for replaying the journal, so that we can do multiple journal replays in parallel. Other file systems will replay the journal at mount time. The kernel can mark a file system as containing a corruption, if it finds a problem while it is working with the file system, in which case e2fsck will force a full file system consistency check at the next reboot. Regards, - Ted -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/20140401150100.gv4...@thunk.org