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Date:      Tue, 13 Apr 1999 22:58:45 +0200 (CEST)
From:      Soren Schmidt <sos@freebsd.dk>
To:        vallo@matti.ee
Cc:        freebsd-current@FreeBSD.ORG
Subject:   Re: ATA disks can do command queueing?
Message-ID:  <199904132058.WAA06683@freebsd.dk>
In-Reply-To: <19990413231447.A14761@matti.ee> from Vallo Kallaste at "Apr 13, 1999 11:14:47 pm"

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It seems Vallo Kallaste wrote:
> Hello !
> 
> Recently installed March 12 -current snapshot and compiled kernel 
> with new IDE subsystem. I see interesting lines in dmesg:

> ad1: 16 secs/int, 31 depth queue, DMA mode
 
> Does it mean that new ATA disks can queue up commands (something 
> similar to SCSI disks?)? I feel like I heard something in the 
> -current list lately but I'm not sure...

Yep that is exactly what it means, however the driver in -current
doesn't take advantage of it yet, but its on my TODO list.
The reason why I put in this verbosity, is so I can get a hint to
which drives support it, and it seems IBM are on of the few that
does.

-Søren


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