I've experienced this same issue with fresh Lenny installation. I installed multipath tools over fresh installation (with other packages) and the machine won't boot after that. Messages on the screen are the same than Ian reported few years ago. I don't have exact copy at hand, but basically I get 'Discovering multipaths...' and after that mount says 'Device or resource busy.'
After I booted into rescue shell and did 'apt-get --purge remove multipath-tools && update-initramfs -u' the machine boots up just fine. I've confirmed that this is reproducible, so I'd say that this bug isn't fixed. The machine is Dell r610 with LSI RAID controller: 03:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 1078 (rev 04) Subsystem: Dell PERC 6/i Integrated RAID Controller Flags: bus master, fast devsel, latency 0, IRQ 16 Memory at df180000 (64-bit, non-prefetchable) [size=256K] I/O ports at fc00 [size=256] Memory at df1c0000 (64-bit, non-prefetchable) [size=256K] Expansion ROM at df100000 [disabled] [size=32K] Capabilities: <access denied> Kernel driver in use: megaraid_sas Kernel modules: megaraid_sas -- System Information: Debian Release: 5.0.4 APT prefers stable APT policy: (500, 'stable') Architecture: amd64 (x86_64) -- Take -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org