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Re: Disabling disk caches [Re: CVS commit: src/lib/libc/sys, re sync(1)]
On Wed, Mar 25, 2009 at 09:44:52PM +0000, Andrew Doran wrote:
> I think we should:
> (a) Automatically disable the disk write cache the moment a file system is
> mounted on the disk, unless that file system is known to handle caching.
> For our purposes, that leaves logging ffs and zfs (and whatever other
> modern file systems come along) with the cache enabled.
While technically this may be the right thing, it won't be popular.
(So, why doesn't sync flush the disk write cache?)
> (b) Change mount to flush the disk cache as a test, if r/w mount. If we get
> an error, send a warning message to the log. This will help us to get
> broken disk drivers fixed.
That seems like a good idea.
David A. Holland
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