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Einar S. Idsø wrote: |
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> Hi, |
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> |
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> *Problem:* |
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> I have a number of hosts spread around the country running the 2.6.12 |
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> kernel. I need to upgrade to 2.6.18, which requires udev to replace |
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> devfs. Is there any way I can prepare /dev for this upgrade so the hosts |
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> will boot without human interaction/booting with CD-ROM? |
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|
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It *should* be as easy as emerging udev and rebooting. The init scripts default |
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to udev by default. |
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|
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> *Details:* |
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> When I previously upgraded my own laptop a year or so ago, this led to |
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> the lack of certain dev-nodes upon boot (/dev/console and /dev/null, I |
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> believe), causing a kernel panic. I fixed that by booting with cd-rom |
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> and recreating the necessary nodes, as described in section 3 here: |
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> http://www.gentoo.org/doc/en/udev-guide.xml |
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|
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These initial devices likely didn't exist in the past since devfs ran from the |
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kernel and operated on a virtual filesystem. Udev works completely different. It |
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runs entirely from userland and populates a tmpfs. Until that tmpfs is created |
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and udev started, those few initial nodes are requires for the init scripts. |
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|
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> This is of unfortunately not an option for my hosts since the majority |
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> don't run any form of LOM, and getting a tech to stand by each host, |
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> boot the Rescue-CD and do all sorts of stuff is a major hassle. |
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> |
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> *Possible solution:* |
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> I think a possible solution may be to do the following while the host is |
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> still running its old kernel: |
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> |
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> mount --bind / /mnt/point |
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> cd /mnt/point/dev |
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> mknod -m 660 console c 5 1 |
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> mknod -m 660 null c 1 3 |
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> cd / |
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> umount /mnt/point |
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> |
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> Will/should this work? If not: Any other suggestions? |
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|
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Yes, this should do the trick. Although, the -m is likely not needed. If you are |
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going to use it, here's the nodes from my / (pre-udev) for reference: |
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|
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crw------- 1 root tty 5, 1 Nov 13 2005 console |
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crw-rw-rw- 1 root root 1, 3 Nov 13 2005 null |
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|
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-- |
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Andrew Gaffney http://dev.gentoo.org/~agaffney/ |
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Gentoo Linux Developer Installer Project |
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Today's lesson in political correctness: "Go asphyxiate on a phallus" |
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-- |
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gentoo-server@g.o mailing list |
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