Re: IDE/ATAPI

From: Benno Senoner (sbenno@gardena.net)
Date: Sun Apr 23 2000 - 10:02:02 EST


Andre Hedrick wrote:
>On Wed, 19 Apr 2000, Alan Cox wrote:
>>
>> Current ATAPI controllers and disks cannot do tagged queueing nor can they
>> do scatter gather DMA. That materially impacts performance under some
>> heavy server load patterns. For most uses it doesnt matter, and IDE is
>> a lot cheaper.
>
>Yes, but Linux will soon have "tagged queueing".....
>
>Andre Hedrick
>The Linux ATA/IDE guy

Andre, can you tell us please a bit more about the purpose, and expected
benefits for IDE devices under Linux using "tagged queueing" ?

Could this be the cause of the relatively bad results on hdrbench compared to
FreeBSD ?
(see my previous post about hdrbench)

Benno.

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