From owner-freebsd-current Tue Apr 13 14: 1:18 1999 Delivered-To: freebsd-current@freebsd.org Received: from freebsd.dk (freebsd.dk [212.242.42.178]) by hub.freebsd.org (Postfix) with ESMTP id BE6D714C91 for ; Tue, 13 Apr 1999 14:01:08 -0700 (PDT) (envelope-from sos@freebsd.dk) Received: (from sos@localhost) by freebsd.dk (8.9.1/8.9.1) id WAA06683; Tue, 13 Apr 1999 22:58:45 +0200 (CEST) (envelope-from sos) From: Soren Schmidt Message-Id: <199904132058.WAA06683@freebsd.dk> Subject: Re: ATA disks can do command queueing? In-Reply-To: <19990413231447.A14761@matti.ee> from Vallo Kallaste at "Apr 13, 1999 11:14:47 pm" To: vallo@matti.ee Date: Tue, 13 Apr 1999 22:58:45 +0200 (CEST) Cc: freebsd-current@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL43 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message