>    Partition check: 

>    hda: hda1 < > hda2 hda3 hda4 

>    hdb: hdb1 < hdb5 hdb6 > hdb2 hdb3 hdb4 

..

>    Kernel panic: VFS: Unable to mount root fs on 03:05

03:05 is kernel-speak for /dev/hda5, which you may notice is missing from the partition check line for hda -- hda5 and hda6 should normally appear between the angle brackets < >.

So this would imply a corrupt or improperly constructed boot sector (partition table) on the drive.

If your two drives are 100% identical, and were both properly made with the same version of player software/upgrade/whatever, then you might be able to fix it by simply copying the boot sector from the second drive (hdb) to the first drive (hda).

I will not include instructions here for that, lest too many fools blow away their music collections.

Cheers

EDIT: your two drive are NOT 100% identical.. did you bugger it up the master/slave or drive to drive copies?

-ml