From mboxrd@z Thu Jan 1 00:00:00 1970 From: "John Stoffel" Subject: Re: second controller: what will my discs be called, and does it matter? Date: Thu, 6 Jul 2006 18:05:17 -0400 Message-ID: <17581.35101.128252.9505@stoffel.org> References: <200607062012.14684.Dexter.Filmore@gmx.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200607062012.14684.Dexter.Filmore@gmx.de> Sender: linux-raid-owner@vger.kernel.org To: Dexter Filmore Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Dexter> Currently I have 4 discs on a 4 channel sata controller which Dexter> does its job quite well for 20 bucks. Now, if I wanted to Dexter> grow the array I'd probably go for another one of these. So, which SATA controller are you using? I'm thinking my next box will go SATA, but I'm still deciding.... Dexter> How can I tell if the discs on the new controller will become Dexter> sd[e-h] or if they'll be the new a-d and push the existing Dexter> ones back? Dexter> Next question: assembling by UUID, does that matter at all? Dexter> (And while talking UUID - can I safely migrate to a Dexter> udev-kernel? Someone on this list recently ran into trouble Dexter> because of such an issue.) I'm using udev and it's not a problem, but I admit I'm also auto-assembling my arrays using the kernel detection stuff. All I have in my mdadm.conf file is MAILADDR john PARTITIONS and it just works for me. But using the UUID is the way to go. Though I admit my system may not be setup like you think. I have a pair of 120gb drives which are mirrored. On top of them I have LVM configured and a pair of partitions setup, so I can grow/move/shrink them at some point. Hasn't happened too often yet. So I'm not using ext3 -> MD -> disks, I'm adding in the LVM layer. John