Re: [PATCH] 2.4.10 improved reiserfs a lot, but could still be better

Matthias Andree (
Mon, 24 Sep 2001 17:32:10 +0200

On Mon, 24 Sep 2001, Beau Kuiper wrote:

> Also, the performace problems seem to be very dependant on the hardware being
> used. 5400rpm drives get hurt a lot, while 7200 rpm drives seem to handle it
> 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.

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].

One might consider adding TCQ to the IDE driver. FreeBSD already has it,
and IBM drives talk it.
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