Date: Fri, 02 Jun 2006 16:45:18 +0100 From: Dieter <freebsd@sopwith.solgatos.com> To: freebsd-questions@freebsd.org, arsptr@optusnet.com.au Subject: Re: Filesystem corruption when drives are mirrored, but not otherwise Message-ID: <200606022345.XAA07715@sopwith.solgatos.com>
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> It seems that this was caused by the (infamous) problem when > softupdates and write caching are both enabled. Disabling write > caching seems to have fixed the problem. Interesting. The disk write cache being on should only cause problems if the system goes down hard/unclean, e.g. power failure. Unless the disk firmware has a bug? Anyway the disk write cache should be off, since even a UPS can't guarantee that the system will not go down hard. > Unfortunately the disk write performance is woeful. There must > be a better way surely? I think that getting NCQ support would help greatly. There are also problems like the one with nforce4 and some brands of disks: http://forums.nvidia.com/lofiversion/index.php?t8171.html It is not obvious what any of this would have to do with mirroring vs. not mirroring.
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