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Subject: Re[2]: HDD read ahead cache

Re[2]: HDD read ahead cache

From: Uwe Freese <>
Date: Thu, 15 Aug 2002 12:07:08 +0200

Hello Harald,

Harald Milz wrote on Thursday, August 15, 2002, 10:00:04 AM:

>> Could it be that one can enable/disable the cache of such a harddrive?

HM> According to the ATA/ATAPI command set you should only be able to
HM> enable/disable the _write_ functionality of the cache. I cannot imagine a
HM> vendor should disable the read cache which would greatly reduce the
HM> performance...

But when I read the same sector from disk every minute and the disk
spins up every time (my 2nd test), it obviously doesn't use the read
cache. Or do you have another idea why this happened?

Bye, Uwe.
Received on 2002-08-15

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