Does anyone know what number on the sticker of the hard drive tells you what the firmware is. The sticker has these numbers on them.
MDL WD2500BB-OODWAO
DCM HSBHCTJAH

Does anyone know ...
Best I can offer is to suggest trying WDC's Data Lifeguard Tools software available on their website. My memory's fuzzy, but it may offer that information. HDDScan (http://hddguru.com/content/en/software/2006.01.22-HDDScan) or HD Tune (http://www.hdtune.com) may as well.