From mboxrd@z Thu Jan 1 00:00:00 1970 From: Douglas Gilbert Subject: Re: [PATCH 1/2] Use sdev_scsi2lun for SCSI parallel drivers Date: Fri, 04 Jul 2014 15:44:04 -0400 Message-ID: <53B70404.9080303@interlog.com> References: <1404474875-109997-1-git-send-email-hare@suse.de> <1404474875-109997-2-git-send-email-hare@suse.de> Reply-To: dgilbert@interlog.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from smtp.infotech.no ([82.134.31.41]:48225 "EHLO smtp.infotech.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753450AbaGDToO (ORCPT ); Fri, 4 Jul 2014 15:44:14 -0400 In-Reply-To: <1404474875-109997-2-git-send-email-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Hannes Reinecke , James Bottomley Cc: Christoph Hellwig , linux-scsi@vger.kernel.org On 14-07-04 07:54 AM, Hannes Reinecke wrote: > SCSI-2 defines only up to 256 LUNs with a flat namespace. My SCSI-2 draft (revision 10b from August 1989) only has 3 bit LUNs placed in byte 1 of the command block, in the top 3 bits. There are also things called LUNTARs and LUNTRNs at the message level. 8 bit LUNs do ring a distant bell, perhaps after SCSI-2? Doug Gilbert