/dev/sda doesn't appear anymore

[demon_cleaner]

Hello there,
(Well if someone cares, a little introduction, since this is my first post... I started using Gentoo about 3 years ago, after trying out a variety of other OSS-OSs and liked it a lot. Had to try Arch Linux in between, but switched back to Gentoo in april, which, until now, was running quite fine, I didn't come across any problems, that I couldn't find a solution to, or if I didn't, at least Google did ... By the way: I use my computer mostly for audio stuff, a bit of recording, synthesis, and sample recording / playback)

I recently upgraded my system (i.e. emerge -upvD system) after a bit of time of not really updating it, and now I can't use my USB 2-mass storage device anymore (an iAudio X5 media player). I'm not sure, wether this is connected to the minor udev upgrade from the end of june, I could not explain it in any other way...

Anyway, the kernel seems to be able to connect to the player, the output of of dmesg | tail is:

[troymc]

What you appear to be missing there is the SCSI disk driver loading & configuring the device. After the USB-storage driver finishes, you should see more messages like this:

[demon_cleaner]

Thank you. modprobe sd-mod solved the problem. I can't remember, that I had to do this before, though, but thanks...
(Could this have to do with some udev configuration stuff? I don't really know anything about udev, so far my system was running fine without me having to look at it any closer, so I thought that's a possibility...)

[frostschutz]

I have the same problem ... for some reason, sd_mod is not loaded automatically anymore. Reason unknown. Workaround is adding it to modules.autoload.d or compiling it directly into the kernel.