Caviar Green 2TB disappears after sleep/hibernation

Im afraid of posting this as im sure its not a unique issue, but I couldnt find anything relevant on the forums.  Im running Win7 Ultimate and im not experiencing any SMART errors. the Hard drive works great otherwise, I just have to reboot my comp every time it goes to sleep. Are there any firmware fixes that have long since addressed this? or is it a device driver setting.  Thx

what is the complete model of the drive and what is your system

we need that info to try to seach for possible problems

Problem device

WDC WD20EARS-00S8B1 ATA    —2TB caviar green

system details

AMD Phenom 2 X3 740 BE



Win7 Ultimate


WD 1TB caviar Black SATA(no issues)<----User/program files 2 partitions

WD 2TB caviar Green SATA(Disapears after sleep and requires boot up to discover)<—Media 1partition

Samsung 470 SSD SATA(no issues) <----OS

do you have the latest bios for your motherboard??

maybe the motherboard doesnt support well the long time that drive takes to  full rpm