From owner-freebsd-scsi@FreeBSD.ORG Sat Feb 15 23:59:48 2014 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 9E05A10F for ; Sat, 15 Feb 2014 23:59:48 +0000 (UTC) Received: from mail.tdx.com (mail.tdx.com [62.13.128.18]) by mx1.freebsd.org (Postfix) with ESMTP id 5FDFA15CB for ; Sat, 15 Feb 2014 23:59:47 +0000 (UTC) Received: from study64.tdx.co.uk (study64.tdx.co.uk [62.13.130.231]) (authenticated bits=0) by mail.tdx.com (8.14.3/8.14.3/) with ESMTP id s1FNxkeN076635 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 15 Feb 2014 23:59:46 GMT Date: Sat, 15 Feb 2014 23:59:46 +0000 From: Karl Pielorz To: Scott Long Subject: Re: Wiring down devices with LSI 2308 / mps? Message-ID: <53DEE6652CDBF8E49ECF9FE3@study64.tdx.co.uk> In-Reply-To: References: <41337B9333D94F88B9469A60@study64.tdx.co.uk> X-Mailer: Mulberry/4.0.8 (Mac OS X) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Cc: "FreeBSD-scsi@freebsd.org" X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 15 Feb 2014 23:59:48 -0000 --On 15 February 2014 14:14:29 -0700 Scott Long =20 wrote: > Hi, > > The LSI cards keep a persistent mapping of hard drive serial numbers to > target numbers. That way, when it=E2=80=99s in RAID mode and you pull a = drive > from one slot and put it into another slot, it=E2=80=99ll recognize that = it=E2=80=99s > the same drive and part of the same array set. It=E2=80=99s incredibly > annoying, and once the persistent mapping is created, it cannot be > cleared just by turning off the RAID mode. What we do at Netflix is use > the a tool provided by LSI to clear out the persistent mapping (and all > of NVRAM, actually), and then turn off the persistence feature. > Unfortunately, you=E2=80=99ll need to contact LSI directly for this tool. = Once > you have it, I can share a script that performs the necessary actions. > Contact me off-list if you=E2=80=99d like more information. Ha - at least I know it's not me going mad then :) I'm living with GPT labels at the moment (and labels on the drive caddies)=20 - if that doesn't work out (it's currently "bearable") I'll tap LSI for the = 'magic tools', and drop you an email if they give me a copy. You're right though it is *incredibly annoying* (especially when you don't=20 know it's doing it!). -Karl