From mboxrd@z Thu Jan 1 00:00:00 1970 From: Doug Ledford Subject: Re: [SPAM] Re: Asynchronous scsi scanning, version 9 Date: Mon, 26 Jun 2006 17:20:09 -0400 Message-ID: <1151356809.4936.10.camel@fc5.xsintricity.com> References: <20060529130515.GE23405@parisc-linux.org> <20060531232139.GA3202@us.ibm.com> <447EE81D.2050906@ums.usu.ru> <20060601132315.GD32143@parisc-linux.org> <1151270127.3617.26.camel@mulgrave.il.steeleye.com> <20060625224631.GD1608@parisc-linux.org> <1151310285.3185.16.camel@laptopd505.fenrus.org> <20060626124001.GG1608@parisc-linux.org> <20060626144442.GA13319@one-eyed-alien.net> <1151348151.4936.8.camel@fc5.xsintricity.com> <20060626210403.GA31085@one-eyed-alien.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20060626210403.GA31085@one-eyed-alien.net> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-hotplug-devel-bounces@lists.sourceforge.net Errors-To: linux-hotplug-devel-bounces@lists.sourceforge.net To: Matthew Dharm Cc: James Bottomley , linux-hotplug-devel@lists.sourceforge.net, linux-scsi@vger.kernel.org, Matthew Wilcox , Patrick Mansfield , Stefan Richter , "Alexander E. Patrakov" , Arjan van de Ven List-Id: linux-scsi@vger.kernel.org On Mon, 2006-06-26 at 14:04 -0700, Matthew Dharm wrote: > On Mon, Jun 26, 2006 at 02:55:50PM -0400, Doug Ledford wrote: > > On Mon, 2006-06-26 at 07:44 -0700, Matthew Dharm wrote: > > > > > As for using one Scsi_Host... there are several usb-storage devices which > > > attach to an entire SCSI bus (not just a single target), so can't make each > > > device it's own target. > > > > This makes no sense to me at all. The USB devices attach to a USB bus, > > the whole notion of a SCSI bus for USB devices is as nothing more than > > an abstraction, and should be able to be arbitrarily changed in the USB > > stack any time you wish. In short, you aren't doing SCSI selections > > over a USB bus, so why should SCSI target IDs vs. host IDs matter? > > Aren't they just all mapped in the driver to the USB device anyway? > > I guess my point is that there are some devices for which the concept of a > 'bus' is -not- an abstraction. These devices have a USB connector at one > end and a SCSI HD-68 connector on the other, and can be attached to 15 > devices in a SCSI chain. Yuk! OK, so such a nasty beast exists, but that just means realistically you should treat such a device as a scsi host instead of a scsi device. For all other normal target devices, the issue of scsi bus vs. scsi target shouldn't matter. > Perhaps I misunderstand your objection? > > Matt > -- Doug Ledford Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642