BenV's notes

I’ve bashed my head into this problem at least three times now, so after finally running to google …. it made me search more than I liked.

The problem descriptions:
* Your system boots fine (maybe because it’s running on software raid), but your /dev/sd* files are gone.
* Your system doesn’t boot anymore, complaining about not finding your boot device when booting your custom kernel, but the stock kernel does work.
* Mounting partitions doesn’t work anymore, saying stuff like mount: special device /dev/sda does not exist

Reason:
* Your custom kernel has CONFIG_SYSFS_DEPRECATED enabled. To find out:

benv@uil$ zcat /proc/config.gz | grep CONFIG_SYSFS_DEPRECATED
CONFIG_SYSFS_DEPRECATED=y

Since udev version 151 (or something close to that) this will sparsely populate /dev. Yay.

If you don’t believe it, check out /usr/share/doc/udev-*/README:

- Udev will not work with the CONFIG_SYSFS_DEPRECATED* option.


Another problem solved.