Re: [gentoo-user] problem with raid1: error while booting

[Richard Fish <bigfish@asmallpond.org>]

Jarry wrote:

>> In the maintenance mode, does /sys/block/md0/* exist?  What does "cat
>> /proc/mdstat" report?
>
>

Actually, if the kernel autodetection runs at boot time, /proc/mdstat
should show the devices regardless of whether the device nodes exist or
not....so something is a bit strange with your kernel configuration.

Either you are missing a RAID driver in the kernel, or a necessary disk
driver.  Take a careful look at what "grep =m /usr/src/linux/.config"
reports...something in there is almost certainly the problem!

You can also follow my notes about creating an mdadm.conf file in
another message (sorry for the multiple replies!).

> It seems (or at least it is discussed there) that this (udev does not
> create /dev/md* at startup) is some kernel-bug! If some of our kernel
> developers is watching this list, could he confirm or refuse it?


I don't know if I would call it a kernel bug.  It is mostly just
functionality that isn't clear where it belongs, and there is no obvious
right thing to do.  The autodetection feature of the MD driver came from
a different era of kernel development, and would almost certainly not be
accepted today.


> Can I somehow get rid of udev, when it is causing problems to me?


Well, you can always revert back to static device nodes.  See the
RC_DEVICES entry in /etc/conf.d/rc.  If you set this, you will need to
run a bunch of /sbin/MAKEDEV commands to get the static nodes created.

If you do decide to go this route, I encourage you to consider it a
temporary solution until you get the system up and running. 

-Richard

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