> One thing I find FreeBSD very fussy and sensitive in comparison to Linux > OSes is that whenever there is an power outage, something wrong is bound > to happen. Maybe, it was made to happen this way but living in here over > the other side of the world, we do have to face power outages despite > our best efforts.
The problem with power outtages is that in the presence of write caching *all* bets are off. In practice I have found this a bigger problem with UFS2 than with e.g. reiserfs on Linux; possibly because the characteristics of disk i/o in those cases make it less probably to actually trigger a problem in practice (but this is just my speculation, but fits my experiences). But regardless, all bets *are* off in the event of a power outtage. Unless you have battery backed caching controllers, you will need to disable write caching (hw.ata.wc=0) in order to be safe - at the cost of performance. Alternatively for 7.0+ or CURRENT you can use ZFS which understands these things and will actually send cache flush commands to the drives on transaction commits, thus allowing safe operation in the event of a power failure, while not taking the performance hit associated with disabling write caching. -- / Peter Schuller PGP userID: 0xE9758B7D or 'Peter Schuller <[EMAIL PROTECTED]>' Key retrieval: Send an E-Mail to [EMAIL PROTECTED] E-Mail: [EMAIL PROTECTED] Web: http://www.scode.org _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
