Date: Tue, 5 Feb 2002 02:04:06 -0500 From: Alan Eldridge <alane@geeksrus.net> To: Mike Meyer <mwm-dated-1013323566.f9e499@mired.org> Cc: questions@freebsd.org Subject: Re: ATA_STATIC_IDS Message-ID: <20020205070406.GA93914@wwweasel.geeksrus.net> In-Reply-To: <15455.32686.88737.631037@guru.mired.org> References: <91010086@toto.iv> <15455.32686.88737.631037@guru.mired.org>
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On Tue, Feb 05, 2002 at 12:46:06AM -0600, Mike Meyer wrote: >Alan Eldridge <alane@geeksrus.net> 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: <VIA 82C596 ATA66 controller> port 0xa000-0xa00f at device 7.1 on pci0 atapci1: <Promise ATA100 controller> 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
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