Date: Tue, 1 Mar 2005 09:00:49 -0800 From: David Wolfskill <david@catwhisker.org> To: stable@freebsd.org Subject: "ioctl DIOCSMBR: Operation not permitted" from "boot0cfg -s 1" Message-ID: <20050301170049.GB5862@bunrab.catwhisker.org>
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On a couple of machines here (my laptop and an SMP "build machine"), I track each of RELENG_4 and RELENG_5 on a daily basis. I do this by using separate bootable slices. As a consequence of doing things this way, I have become accustomed to using boot0cfg to switch the default boot slice when I need to do this (which is usually twice daily per machine). I know of no problems doing this with RELENG_4 in the past, nor with RELENG_5 (since that tag was laid down, of course -- there had been an issue with 5.x when it was -CURRENT back in the earlier days of GEOM, but that was un-broken withiin a few days -- up through Sunday (27 Feb). This morning, I got through building & booting 5.4-PRERELEASE OK, so I tried switching back to slice 1 (where I have RELENG_4 living). This is what I saw: freebeast(5.4-P)[1] sudo boot0cfg -s 1 -v ad0 Password: boot0cfg: /dev/ad0: ioctl DIOCSMBR: Operation not permitted freebeast(5.4-P)[2] I also tried in single-user mode (after "fsck -p" and mounting the usual file systems, since boot0cfg is in /usr/sbin); same result. I can't help but think that this is a symptom of a mistake -- especially for -STABLE. (-CURRENT/HEAD, I could believe, though a "heads up" would be welcome if such a change were contemplated.) Now, on my laptop, it's easy enough to just press the appropriate Fx key at boot; for that build machine -- which runs headless, keyboardless, but with a serial console -- I found that I needed to interrupt the boot sequence early -- just after the boot blocks have been loaded; I was prompted: >> FreeBSD/i386 BOOT Default: 0:ad(0,a)/boot/loader boot: and responded "0:ad(0,1,a)/boot/loader", which booted from slice 1 (which was running 4.11-STABLE); I then used "boot0cfg" to switch the default boot slice to "1". I should be in a position to be able to test potential fixes. Thanks, david -- David H. Wolfskill david@catwhisker.org There is a place in software engineering for an appreciation of history. See http://www.catwhisker.org/~david/publickey.gpg for public key.
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