Federico Giannici schrieb: > Matthias Kilian wrote: >> On Tue, Jun 20, 2006 at 10:59:58AM +0200, Federico Giannici wrote: >> [...] >>> The pc freezes (but only occasionally) during dumps of the entire >>> filesystem, using the system "dump" program. The dump is done while >>> the system is in use, so files may change during the dump. >>> >>> Yesterday another PC freezed! >>> I noticed that it occurred just at the time that a copy of a >>> directory was done, this time by means of the "tar" program. This >>> time too the backed-up files were in use and probably written. >> >> What else is running? What's mounted? > >> ps: as somebody else wrote, fishy power supplies are a common (and >> hard to debug) cause of failure, too. > > As many suggested, I replaced the power supply with a big and expensive > one. > > It just crashed again! At the first backup (it usually crash every 3-4 > times). > > So, now we have changed every piece of hardware. And remember that a > second PC freezed too, just during a backup of a directory. So I > continue to suspect that it's a software problem related to high disk/io > usage, and maybe with concurrent reads and writes. > > Here is the dmsg. > > Thanks. > > > OpenBSD 3.9-current (GENERIC) #591: Sat Jun 17 00:52:05 MDT 2006 > [EMAIL PROTECTED]:/usr/src/sys/arch/amd64/compile/GENERIC > real mem = 2146758656 (2096444K) > avail mem = 1835319296 (1792304K) > using 22937 buffers containing 214884352 bytes (209848K) of memory > mainbus0 (root) > --snip-- > dkcsum: sd0 matches BIOS drive 0x80 > root on sd0a > rootdev=0x400 rrootdev=0xd00 rawdev=0xd02 > > Hmm,
the problems doesn't have to be in software. I have an example of freezing: I have a box working as a bridge which freezed on high traffic. I replaced everything of hardware upgraded the software and it still freezes. After a lot more testing I found my problem: the system freezes only if it were connected to a Cisco Catalyst with a stge Network card and fiber optic cable. Using a fxp card and twisted pair cable "solve" the problem -> no more freezes. Since you talk of backup, do you backup on another machine in your lan? Have you tried to use another network card (with another chip) or another switch? guido
