From mboxrd@z Thu Jan 1 00:00:00 1970 From: Patrick Mansfield Subject: Re: [RFC] IBM Power RAID driver (ipr) Date: Tue, 20 Jan 2004 12:35:58 -0800 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <20040120123558.A23985@beaverton.ibm.com> References: <40085EDA.4010802@us.ibm.com> <20040119183400.A4182@infradead.org> <400C3E70.9040702@us.ibm.com> <20040120133858.A15671@infradead.org> <400D5A28.1000301@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from e31.co.us.ibm.com ([32.97.110.129]:61849 "EHLO e31.co.us.ibm.com") by vger.kernel.org with ESMTP id S265751AbUATUhs (ORCPT ); Tue, 20 Jan 2004 15:37:48 -0500 Content-Disposition: inline In-Reply-To: <400D5A28.1000301@us.ibm.com>; from brking@us.ibm.com on Tue, Jan 20, 2004 at 10:41:12AM -0600 List-Id: linux-scsi@vger.kernel.org To: Brian King Cc: Christoph Hellwig , linux-scsi@vger.kernel.org On Tue, Jan 20, 2004 at 10:41:12AM -0600, Brian King wrote: > Christoph Hellwig wrote: > > We should probably always send a STOP UNIT when unconfiguring devices > > from the midlayer or and upper driver. > > Sounds reasonable. That would screw up clustered or shared storage, where there are other hosts attached, and sending a STOP UNIT would prevent them from talking to the LUNs. And, on addition of the scsi_host (hot add, reboot, or modprobe) the drives would have to all be spun up again, and we do not handle that well at all. -- Patrick Mansfield