Messages in this thread |  | | Date | Mon, 24 Sep 2001 17:47:45 +0200 | From | Matthias Andree <> | Subject | Re: [PATCH] 2.4.10 improved reiserfs a lot, but could still be better |
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On Mon, 24 Sep 2001, Alan Cox wrote:
> > > better. Decent write caching on IDE devices (like the 2meg buffer on the IBM) > > > can completely hide this issue. > > > > Decent write caching on IDE devices can eat your whole file system. > > YM bad write caching 8)
Well, drives do reorder their cache flushes, otherwise, they don't need the cache.
> > Turn it off (I have no idea of internals, but I presume it'll still be a > > write-through cache, so reading back will still be served from the > > buffer). Do hdparm -W0 /dev/hd[a-h]. > > You can't turn it off and on many drives you can't flush the cache either > the operation is not implemented.
Those drives should be blacklisted and rejected as soon as someone tries to mount those pieces rw. Either the drive can make guarantees when a write to permanent storage has COMPLETED (either by switching off the cache or by a flush operation) or it belongs ripped out of the boxes and stuffed down the throat of the idiot who built it.
-- Matthias Andree
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