Warty 99 is right, you are entitled to the information/file under DPA - this has been the case for some time, albeit not well advertised. You will get all of your old reports intact; however, the PMA personal file that has your NOK records and every bit of papers since attestation/application were culled significantly over a period. No sinister reason, just a need to reduce the amount of irrelevant stuff on file. A hated job for the desk SNCOs/officers who were already being stretched by lack of JPA functionality and internal establishment changes in prep for move to HW.
Just make sure that you define exactly what you want and remember you are entitled to it.
Ed