Description:
------------
normal -almost basic- Arch installation, 64Bit, Gnome, dbus activated
PC has a scsi subsystem with 2 optical drives, a hdd and a zipdrive
also a ide dvd-burner

Problem: no access to the optical scsi drives.
the hdd is home of /tmp /var, swap,... works fine
the ide dvd-burner works fine also - automount in Gnome works, access to data disks and audio-cd's is working normaly

As I thought it might be a kernel-module issue I already changed the SCSI host adapter from an LSI model to a adaptec - no change

Surprisingly everything worked fine with old Ubuntu 6.06 and is still working with Live Disros like Linux Mint Insallation Media or the Systemrescue-CD. So no Hardware Issue! I tested with both SCSI host adapter's.

So I think it's a configuration Problem with Arch, but I was unable to find anything like that in the Internet nor was there anybody in the IRC Support channel able to help.

Might be a kernel issue, dbus, or whatever. But it works with almost any other distro :-) But I don't want to change...

If it is not a bug, definitely the solution for this issue should be documented in the wiki [there must be a solution]

Steps to reproduce:
-------------------
Put a CD into the drive... the drive starts working, the PC freezes for seconds [can't access console=>dmesg] but the gui keeps responding. dmesg is then filled with scsi error messages like Bus Reset, etc...