On Thu, Mar 03, 2005 at 01:30:15AM +0100, Poul-Henning Kamp wrote: > In message <[EMAIL PROTECTED]>, Roland Dowdeswell wri > tes: > > >Let's discuss a simple example and see how it works. Let's walk > >through a user login, with /etc/passwd on GBDE and the filesystem > >mounted with mtime. > > These days, on the majority of low cost disks used in enduser > configurations you risk looking an entire track if the disk were > writing when you pulled power. (People complain about this, but > doesn't seem to be willing to pay to avoid it.)
No matter what disk you take - writes never have been atomic. The major difference I see is that you get a read error back in the disk failure case, while such a crypto failure produces more or less random data without any error. Mounting unclean filesystems rw for bg_fsck can be considered dangerous with such unexpected data corruption. And how would you know that a restore from backup is required for a damaged file? -- B.Walter BWCT http://www.bwct.de [EMAIL PROTECTED] [EMAIL PROTECTED] _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
