sata_sil not loaded at boot time, if driver-police is MODULES=DEP

I just installed Ubuntu 12.04 LTS on a white box. After installation the system failed to boot, as the root fs couldn't be found. I noticed that some of the hard drives were not found and consequently the RAID5 stripe hosting the LVM volume hosting the root fs couldn't be constructed. It turned out that the sata_sil driver modules wasn't loaded at boot time, hence the RAID controller (only used in JBOD mode here) wasn't initialized at the drives attached to it not presented to the host.

I added the 'sata_sil' module to /etc/initramfs-tools/modules (along with all the other modules loaded by the installation tool running in rescue mode), changed the driver-policy in /etc/initramfs-tools/conf.d/driver-policy from 'MODULES=dep' to 'MODULES=list' and rebuilt the initramfs (using `dpkg-reconfigure linux-image-3.2.0-24-generic`. Now the server boots successfully.

I like the idea of running the system only with the drivers needed, but perhaps the tool deciding on which modules get in should err on the side of a driver too much, rather than a driver too few.

--8<--
tho@paris:~$ dpkg -l|grep initramfs-tools
ii initramfs-tools 0.99ubuntu13 tools for generating an initramfs
ii initramfs-tools-bin 0.99ubuntu13 binaries used by initramfs-tools
-->8--

hth