Subject: [linux-audio-dev] disk bandwidth
From: Paul Barton-Davis (pbd_AT_Op.Net)
Date: Fri Jun 09 2000 - 15:19:36 EEST
From linux-kernel:
>From: Mark Hahn <hahn_AT_coffee.psychology.mcmaster.ca>
>Date: Wed, 7 Jun 2000 18:33:27 -0400 (EDT)
>Subject: ATA queued commands (was Re: ULTRA ATA/100)
>
>> It seems that "Tagged command queuing" is also mentioned in the
>> specifications of newer IBM Desktars at
>> http://www.storage.ibm.com/hardsoft/diskdrdl/prod/deskpop.htm
>
>IBM deserves MAJOR credit for the following page:
>http://www.storage.ibm.com/hardsoft/diskdrdl/prod/deskpop.htm
>
>all too often, lawyers have made companies anal-retentive about specs.
>in the 75GXP doc, I can't find whether it supports a queue depth >0.
>for Linux, that's not a big deal: disconnect is the real win, since
>that lets us talk to the other disk on the chain. (and Linux already
>does a better job of head scheduling with a queue of 256 requests.)
>
>37 MB/s typical sustained bandwidth (>35 as measured by bonnie,
>through ext2). basically A Very Nice Disk.
Wow! 37MB/s from one disk ? This is almost enough to make me abandon
SCSI :)
--p
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