Sorry. Hatte die Black im Kopf.
Hier die Liste der Blue-Modelle mit 500er Platter
Caviar Blue (7200RPM, 16MB cache, SATA-300 interface)
WD2500AAKS-00UU3A0 250GB (16MB cache) (1/1)
WD3200AAKS-00M9A0/00V1A0/00UU3A0 320GB (16MB cache) (1/2)
WD5000AAKS-00M9A0/22M9A0/00D2B0/00V1A0/22V1A0/65V0A0/00V0A0/07V0A0/00E4A0/007AA0/08V0A0/00UU3A0/00H2B0 500GB (16MB cache) (1/2)
WD6400AAKS-00H2B0/00E4A0 640GB (16MB cache) (2/3)
WD10EALS-00Z8A0 1TB (32MB cache) (2/4)
Caviar Blue (7200RPM, 16MB cache, SATA-600 interface)
WD2500AAKX-001CA0 250GB (1/1)
WD3200AAKX-001CA0/221CA0 320GB (1/2)
WD5000AAKX-001CA0/221CA0 500GB (1/2)
WD7500AALX--009BA0 750GB (32MB cache) (2/3)
WD10EALX-009BA0 1TB (32MB cache) (2/4)
Platter capacities of these drives are unknown, but 500GB seems to be most likely, so they're here for now.