If you have a 30GB disk, the kernel doesn't know about it:
Sep 24 19:23:20 ubuntu kernel: [17179577.372000] hdb: 4059264 sectors (2078 MB) w/2048KiB Cache, CHS=4092/16/62, UDMA(66)
Perhaps you have another hard disk that the dapper kernel doesn't recognise?
If you have a 30GB disk, the kernel doesn't know about it:
Sep 24 19:23:20 ubuntu kernel: [17179577.372000] hdb: 4059264 sectors (2078 MB) w/2048KiB Cache, CHS=4092/16/62, UDMA(66)
Perhaps you have another hard disk that the dapper kernel doesn't recognise?