From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Furness Subject: Re: Can I define SCSI device order? Date: 11 Mar 2003 08:02:26 +0000 Sender: linux-admin-owner@vger.kernel.org Message-ID: <1047369746.16929.4.camel@Zebra.vil.ite.mee.com> References: <5.1.1.6.0.20030310075250.00aedf30@mustang> <1047314534.15524.4.camel@Zebra.vil.ite.mee.com> <3E6D44D3.6010208@triton.net> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <3E6D44D3.6010208@triton.net> List-Id: Content-Type: text/plain; charset="us-ascii" To: James Goodwin Cc: linux-admin@vger.kernel.org Yeah, I could do that, but it is more than just an issue of making sure everything is connected; more devices on a single bus = less bandwidth for each disk. I'm building this for speed. It's not really that bigger deal, I just wanted to try and make it as foolproof as possible so that if our main system failed, I (or anyone else) could plug the RAID array into the backup system and simply boot it up and have it work. Instead, there's some reconfiguring needed, which in turn means I have to write more instructions for people to follow. But not many, though. :) Paul. On Tue, 2003-03-11 at 02:07, James Goodwin wrote: > Doesn't your Adaptec Card have both internal and external connections? > If so, you can just plug your HD's onto the Internal connection and the > RAID to the port and make sure your termination is at the END's of the > chain (not the card). You'll also need to make sure the SCSI ID's of > the drives are different (I don't remember which one needs to be higher). > > Regards, > James > > Paul Furness wrote: > > >Absolutely. The "internal" controller is an embedded one on the > >motherboard. I'm calling it "internal" because it's being used to > >control the hard disks which are inside the box. The "external" > >controller is a normal, PCI card. I'm calling it "external" here because > >it it being used to drive a disk array which is in a different box. > > > >I don't have any option to change the settings of the motherboard; I can > >indeed disable the embedded controller, but that means I'll need to go > >and buy another controller. > > > > > > Just once I'd love something important to also be easy. :) > > > > > >On Mon, 2003-03-10 at 15:59, Scott Taylor wrote: > > > > > > > >>Internal/External SCSI controllers? Do you mean one is built onto the > >>Motherboard? > >> > >>I think you need to ask your hardware manufacturer this one, it may be as > >>simple as a jumper. Personally, if I add PCI controllers to a motherboard > >>I usually disable any on-board ones. Better yet, don't buy motherboards > >>with on-board SCSI. If you must have two SCSI controllers then make them > >>both add-on cards. > >> > >>Scott. > >> > >>- > >>To unsubscribe from this list: send the line "unsubscribe linux-admin" in > >>the body of a message to majordomo@vger.kernel.org > >>More majordomo info at http://vger.kernel.org/majordomo-info.html > >> > >> > > > - > To unsubscribe from this list: send the line "unsubscribe linux-admin" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Paul Furness Systems Manager Visual Information Lab Mitsubsihi Electric ITE BV Guildford, UK Steepness is an illusion caused by flat things leaning over.