Boyd Stephen Smith Jr. --> debian-user (2008-12-08 16:46:46 -0600):
> http://reactivated.net/writing_udev_rules.html
Thanks, udev(7) is probably what I was looking for.
I tried two approaches:
1) Using built-in persistent symlinks (/dev/disk/...).
2) Writing custom rules to create symlinks to the desired file system
block devices.
I then used those symlinks in /etc/fstab and /boot/grub/menu.lst
While 1) worked fine, I noticed a problem with 2): passing the symlink
to the root file system as the root= kernel option doesn't work ("ALERT!
/dev/root doesn not exist"...). I guess this makes sense since my
custom rule which defines the root file system symlink is in a file on
the root file system (/etc/udev/rules.d/010_local.rules)... But why
does 1) work then? The symlinks I use (/dev/disk/by-id/scsi-XXX-partN)
seem to be defined in /etc/udev/persistent.rules, i.e. also on the root
file system:
KERNEL=="sd*[!0-9]|dasd[!0-9]*|sr*", ENV{ID_SERIAL}=="?*", \
SYMLINK+="disk/by-id/$env{ID_BUS}-$env{ID_SERIAL}"
KERNEL=="sd*[0-9]|dasd*[0-9]", ENV{ID_SERIAL}=="?*", \
SYMLINK+="disk/by-id/$env{ID_BUS}-$env{ID_SERIAL}-part%n"
Any hints?
Regards, Jukka
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