From owner-freebsd-questions Mon Feb 4 23: 4:45 2002 Delivered-To: freebsd-questions@freebsd.org Received: from wwweasel.geeksrus.net (wwweasel.geeksrus.net [64.8.210.226]) by hub.freebsd.org (Postfix) with ESMTP id 4667837B41C for ; Mon, 4 Feb 2002 23:04:36 -0800 (PST) Received: (from alane@localhost) by wwweasel.geeksrus.net (8.11.6/8.11.6) id g15746W94314; Tue, 5 Feb 2002 02:04:06 -0500 (EST) (envelope-from alane) Date: Tue, 5 Feb 2002 02:04:06 -0500 From: Alan Eldridge To: Mike Meyer Cc: questions@freebsd.org Subject: Re: ATA_STATIC_IDS Message-ID: <20020205070406.GA93914@wwweasel.geeksrus.net> References: <91010086@toto.iv> <15455.32686.88737.631037@guru.mired.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <15455.32686.88737.631037@guru.mired.org> User-Agent: Mutt/1.3.25i X-message-flag: Magic 8-Ball says "Outlook not so good." I'll ask it about Exchange next. Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Tue, Feb 05, 2002 at 12:46:06AM -0600, Mike Meyer wrote: >Alan Eldridge types: >> Can anybody explain what the practical impact of not enabling ATA_STATIC_IDS >> in the kernel is? >> >> E.g., with static ids I have my / on ad4s1a. If I don't enable ATA_STATIC_IDS, >> when I go to reboot the system, do I get an unbootable system, or one that just >> can't fsck or mount anything once it boots? (I'd guess the answer is "yes"...) > >The answer is "it depends". If ATA_STATIC_IDS is enabled, the drives >are numbered so that 0 is the primary master, 1 is the primary slave, >2 is the secondary master, 3 is the secondary slave, and so >on. Hmmm. Just how many IDE controllers do you have, anyway? [alane ~]$ grep atapci /var/run/dmesg.boot atapci0: port 0xa000-0xa00f at device 7.1 on pci0 atapci1: port 0xc000-0xc03f,0xbc00-0xbc03,0xb800-0xb807,0xb400-0xb403,0xb000-0xb007 mem 0xdb000000-0xdb01ffff irq 11 at device 11.0 on pci0 ata2: at 0xb000 on atapci1 ata3: at 0xb800 on atapci1 1 disk (master) on each of ata2 (ad4) and ata3 (ad6). The onboard VIA ATA66 controller is disabled (both channels). Bottom line seems to be that disabling ATA_STATIC_IDS is a Bad Idea most of the time, from what you said (elided). Swapping on /usr? The horror ... So let me ask this: why would you want to use dynamic ids? With vinum, perhaps? -- Alan Eldridge No wonder people say Unix is confusing. You're supposed to fsck *before* you mount? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message