Not a hijack bug. The only thing in hijack that could affect this is the config.ini [hijack] spindown_seconds=xx parameter. If you set that to zero, then it will be completely disabled on the NEXT REBOOT, and Hijack will then not touch the harddrives (except for http and web access, after which they will never spin down again until the player software decides to tell them to).

And please refrain from startling the masses by putting "hijack" and "bug" together on the subject line before confirming it.