OK. It appears that the cables and so on are fine:

Probing primary interface...

hda: IC25N040ATCS04-0, ATA DISK drive

(repeats)

ide0 at 0x000-0x007,0x038 on irq 6

hda: IC25N040ATCS04-0, 38154MB w/1768kB Cache, CHS=4864/255/63

It also appears that your partition table is fine.

Partition check:

 hda: hda1 < hda5 hda6 > hda2 hda3 hda4

Your root filesystem is also OK:

VFS: Mounted root (ext2 filesystem) readonly.

Your music partition isn't:

EXT2-fs: ide0(3,4): couldn't mount because of unsupported optional features.

Tried to mount /dev/hda4 as ext2 but got error 22

Can you drop to a shell prompt on the player? Press Ctrl+C once the player's running.

Once you're there, can you run the following:

fdisk -l /dev/hda

(that's a small-L), and post the results?