Dustin J. Mitchell wrote:

I think that this has nothing to do with chunked holding disk files
(which are completely different from split files on tape).

Rather, you have datestamps (8 digits) in your headers, but timestamps
(14 digits) in your holding-disk directory names.

It's normal on old release or if usetimestamps is set to "no"

What version of Amanda are you using?  What is the value of the config
parameter "usetimestamps"?

Can you run:
 amrestore /Data/amanda/amanda-hold/20080416190001/xxx._raid0.0
Did it successfully retrieve it?

Jean-Louis