Consolidate not working, Library stuck, ...

I want to transfer my music from iMac G5 to new MBP and keep Rating, Play Counts, etc. intact.
On iMac G5 it's manually organised, but for future (and moving) I want to upgrade to automatic organisation by iTunes.

Since the HD in iMac G5 is too small for the consolidate operation, I duplicated the whole Disk to a 1TB external and I'm now operating from this Volume.

First (I've seen this problem here): Consolidating was not possible, Error Message: "not enough room" (wrong).
I figured out that this was due to some tracks residing on another external Disk.
Though they were perfectly accessible, the Consolidate function failed. So this is a Bug.

Now that I worked around this (unplugging the other volume and Super Remove Dead Tracks Script was helpful),
the consolidate starts working but then fails after some 10 minutes with the error message:
"Copying files failed. The disk could not be read from or written to."

I'm quite sure the disk is fine and it's something else.
Just that I have no idea what to do now and it's starting to annoy me more and more that I have to spend so much time for this move.

Maybe you have another idea or know what could be the problem with this error messag.

I would greatly appreciate help on this.
Thanks,
Michael

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