Firmware Update WD1002FBYS-18W8B0 1TB

Hi , I would like information about the firmware update hard disk WD1002FBYS - 18W8B0 , I have problems , sometimes it starts and sometimes not.

Currently these are the data on the disk

WD1002FBYS - 18W8B0
FIRMWARE : 03.00C09
SERIAL : WMATV6276682

3 disk are having the same problem

Thank you for your help

Greetings from Venezuela

Sorry if my English is not good, I used a translator.

Jose De Oliveira