> back when i had mirroring via devfs (some three years ago now) i used > 'cmp' to verify that the disks were being correctly written to and > that no errors have occurred. i ran cmp from the nigtly log at least > couple of times a week.
that's a good idea. when using the mirror device, no write error is issued unless all mirrored copies are unwritable. this would make me nervous since without a checksum, it's hard to know which copy is good. (/n/sources/plan9/sys/src/9/port/devfs.c:697) - erik
