Same problem here, Speccy sees as normal.
SD
Hitachi HTS547550A9E384
Manufacturer Hitachi
Product Family Travelstar
Series Prefix Standard
Speed, Expressed in Revolutions Per Minute (rpm) 5400
Model Capacity For This Specific Drive 750GB
Heads 16
Cylinders 16383
SATA type SATA-II 3.0Gb/s
Device type Fixed
ATA Standard ATA8-ACS
48-bit LBA Supported
Serial Number J2150050G0Y6ZC
Interface SATA
Capacity 488GB
Real size 500,107,862,016 bytes
RAID Type None