From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: sg regression in 2.6.16-rc5 Date: Fri, 03 Mar 2006 15:30:03 -0500 Message-ID: <4408A74B.30306@garzik.org> References: <4404AA2A.5010703@torque.net> <20060301083824.GA9871@merlin.emma.line.org> <4405E8AA.1090803@rtr.ca> <44089C34.2030604@garzik.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.dvmed.net ([216.237.124.58]:58769 "EHLO mail.dvmed.net") by vger.kernel.org with ESMTP id S932351AbWCCUaL (ORCPT ); Fri, 3 Mar 2006 15:30:11 -0500 In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Linus Torvalds Cc: Steve Byan , Mark Lord , Matthias Andree , Douglas Gilbert , Mark Rustad , linux-scsi@vger.kernel.org, Linux Kernel Mailing List Linus Torvalds wrote: > > On Fri, 3 Mar 2006, Jeff Garzik wrote: > >>256 max sectors IDE driver, 200 max sectors libata (due to driver not >>hardware). > > > When I said "lower due to broken hw" I was more thinking about things like > the SiIimage driver, which actually limits the rqsize to 15 sectors due to > some strange hw interactions with seagate SATA devices. Yep. There's trouble if the last FIS (sata packet, max 8K) is exactly 7.5K. > (It will then raise it back up to 128 if it's not a Seagate SATA drive. I > forget what the exact issue was. Some strange corruption in some limited > case, and not allowing big requests worked around it. There's some > strange IDE quirks out there...). Technically its if (sectors % 15 == 1) explode :) Yes, IDE is a weird weird world... Jeff