Note the ID appears to be suffering from endian issues
scsi 8:0:0:0: Direct-Access OTHSBI A H PQ: 0 ANSI: 0
APPLE FIRMWARE'S DISK MODE
Note: sector size is 2048 (not 512)
Disk /dev/sdb: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 2432 cylinders
Units = cylinders of 16065 * 2048 = 32901120 bytes
Disk identifier: 0x20202020
Device Boot Start End Blocks Id System
/dev/sdb1 1 4 128394 0 Empty
/dev/sdb2 5 2432 78011640 b W95 FAT32
ROCKBOX USING 2048 BYTE SECTORS
Note: sector size is 2048 (not 512)
Disk /dev/sdb: 320.1 GB, 320105447424 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 2048 = 32901120 bytes
Disk identifier: 0x20202020
Device Boot Start End Blocks Id System
/dev/sdb1 1 4 128394 0 Empty
/dev/sdb2 5 2432 78011640 b W95 FAT32
ROCKBOX USING 1024 BYTE SECTORS
Note: sector size is 1024 (not 512)
Disk /dev/sdb: 160.0 GB, 160052723712 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 1024 = 16450560 bytes
Disk identifier: 0x20202020
Device Boot Start End Blocks Id System
/dev/sdb1 1 4 64197 0 Empty
/dev/sdb2 5 2432 39005820 b W95 FAT32