From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from bombadil.infradead.org ([198.137.202.133]:49718 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750739AbeDFGmj (ORCPT ); Fri, 6 Apr 2018 02:42:39 -0400 Date: Thu, 5 Apr 2018 23:42:36 -0700 From: Christoph Hellwig To: Hannes Reinecke Cc: Tim Walker , Christoph Hellwig , dgilbert , linux-scsi , linux-block@vger.kernel.org Subject: Re: Multi-Actuator SAS HDD First Look Message-ID: <20180406064236.GA17456@infradead.org> References: <20180326170840.0130f366@pentland.suse.de> <1c800f70-0d50-bc5b-3b73-e36a1cea0eec@interlog.com> <20180403074637.GB13259@infradead.org> <20180406082418.127a0ec6@pentland.suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20180406082418.127a0ec6@pentland.suse.de> Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org On Fri, Apr 06, 2018 at 08:24:18AM +0200, Hannes Reinecke wrote: > Ah. Far better. > What about delegating FORMAT UNIT to the control LUN, and not > implementing it for the individual disk LUNs? > That would make an even stronger case for having a control LUN; > with that there wouldn't be any problem with having to synchronize > across LUNs etc. It sounds to me like NVMe might be a much better model for this drive than SCSI, btw :)