From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:55272) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1StLpx-0005aI-0n for qemu-devel@nongnu.org; Mon, 23 Jul 2012 12:50:26 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1StLpw-0001hl-37 for qemu-devel@nongnu.org; Mon, 23 Jul 2012 12:50:24 -0400 Received: from mx1.redhat.com ([209.132.183.28]:12919) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1StLpv-0001hX-RJ for qemu-devel@nongnu.org; Mon, 23 Jul 2012 12:50:24 -0400 Message-ID: <500D80CB.80601@redhat.com> Date: Mon, 23 Jul 2012 18:50:19 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <1342448756-7582-1-git-send-email-pbonzini@redhat.com> <1342448756-7582-2-git-send-email-pbonzini@redhat.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 1/5] scsi-disk: removable hard disks support START/STOP List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Blue Swirl Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org Il 23/07/2012 18:44, Blue Swirl ha scritto: >> > Support for START/STOP UNIT right now is limited to CD-ROMs. This is wrong, >> > since removable hard disks (in the real world: SD card readers) also support >> > it in pretty much the same way. > I remember vaguely tuning a set of large SCSI hard disks > (non-removable) so that they all didn't start immediately at the same > time (which could have burned out the PSU) but only with START UNIT > command. I think Linux or maybe even the BIOS started the drives > (nicely in sequence) before accessing the drive. Yes, all disks do start/stop. Removable disks support load and eject in addition. I'll fix the commit message. Paolo