On Mon, Oct 14, 2013 at 7:09 PM, Brad Mettee <bmet...@pchotshots.com> wrote: > On 10/14/2013 12:50 PM, CeDeROM wrote: >> Then why random files gets damaged as well even they are not >> accessed/written on power loss? :-) > > Random files can be affected because the sectors of the hard disk containing > the directory entries for those files, not the file data itself, may be > damaged (ie: the directory was in the process of being written OR the > pointer to that SECTOR was in the process of being written). > > It doesn't mean a file was in active use, just that a chunk of the disk with > data relevant to that file was. Keep in mind, one sector of disk may have > data for a dozen files in it (or more). Damage doesn't have to occur because > a given file was in use at the time of a crash.
Isn't there Journal to prevent and reverse such damage? > If your power grid is prone to failures or blips, I strongly suggest > investing in a UPS. I have UPS in my desktop and also I am working on a laptop, so the power supply is not the only possible cause of system crash.. this may be faulty driver, hardware failure, kernel panic, etc. -- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
