rMBP and Thunderbolt Migration issue

hi all,

have been having bit of issue new mid config rmbp , migration assistant via thunderbolt , wondering if has encountered before.

here happens:

1. start rmbp, choose language , migrate data screen. connect old mbp running updated 10.6.8 , start in target disk mode (holding 't' key on boot).
2. rmbp sees old mbp external disk , goes calculating file size screen.
3. stays on calculating file size screen couple of min before restarts choose language screen.
4. old mbp stays in target disk mode.
5. go through process again , after being on calculating screen couple of min rmbp again go choose language screen.
6. called applecare , unable assist apart suggesting reinstall os , try again.

wondering if there may thunderbolt port issue because use couple of seagate goflex 3.5" drives tm , file storage. current mbp have connected via fw800, when had above problem thought try time machine via thunderbolt. bought seagate tb dock, plugged drive in, , dialog box appears saying drive unreadable, want format drive.

plug on mbp via fw800, reads , works fine.

@ loss.

suggestions or opinions appreciated or else have no choice return it.

all!

 

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