There are a significant
number of drives (PATA and SATA) that implement the ATA form of command queuing.
Maybe in ATA-9, but ATA-8 is too early to obsolete it. (IMO)
From: [EMAIL PROTECTED] on behalf of Jeff Garzik
Sent: Mon 11/14/2005 12:57 PM
To: Hale Landis
Cc: [email protected]
Subject: Re: [t13] ATA-8 APT Teleconference
This message is from the T13 list server.
Hale Landis
wrote:
> Has the old ATA 'queuing' feature been removed from
> ATA-8
(I see it is still in ATA/ATAPI-7... yep, I looked at ATA/ATAPI-7
> vol 1,
that would be about the 5th time this year I have opened that
> document,
something I avoid doing).
I would hope that old ATA queuing feature would
be removed. It adds too
much complexity to an implementation, unless
the host controller
provides some assistance. Even with "smart" host
controllers, error
handling is still complex.
I call it "legacy TCQ",
and don't bother to implement it in
Linux.
Jeff
