From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Fri, 25 May 2001 19:55:26 +0200 From: =?iso-8859-1?Q?Ragnar_Kj=F8rstad?= Subject: Re: [linux-lvm] EMC Storage + LVM + XFS Message-ID: <20010525195526.B28981@vestdata.no> References: <20010525085816.F18197@babbage.hcsd.de> <20010525170908.G29884@babbage.hcsd.de> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable In-Reply-To: <20010525170908.G29884@babbage.hcsd.de>; from Stephan Austermuehle on Fri, May 25, 2001 at 05:09:08PM +0200 Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: List-Id: Content-Type: text/plain; charset="iso-8859-1" To: linux-lvm@sistina.com On Fri, May 25, 2001 at 05:09:08PM +0200, Stephan Austermuehle wrote: > On Fri, May 25, 2001 at 09:47:34AM -0500, Austin Gonyou wrote: > > I don't think I'm clear on your statement. As far as I know, which is a > > lot about EMC, you can definitely plug disks online. Having Linux see > > them? Not necessarily so, but I believe the polling interval for the Fi= bre > > driver will take care of that. >=20 > Oh, of course the Symmetrix allows hot plugging of disks and online > mapping of hypers to one or more channels via a Bin upgrade or the > SDR. But at the moment I do not know any way to make Linux recognise > the additional disks without reloading (rebooting) the driver. But > even if there's a way to online detect new disks -- if a vgscan is > necessary to tell the Linux LVM about where its VGs have gone it isn't > a very smart solution because it often requires application down time. I believe if you write things to /proc/scsi/scsi to make linux detect new devices, they will be added _after_ the existing ones. The order will not be messed up until next reboot, and then vgscan will take care of it. Someone please correct me if I'm wrong :) --=20 Ragnar Kj=EF=BF=BDrstad Big Storage