NVRAM is short for "non-volatile RAM", or code that can be programmed
and retained by the RAM chip, usually the CMOS chip that holds the bios
setup information. If the message is that NVRAM is corrupted or bad,
then it really means that the computer's bios has been deranged. The
solution is to clear and re-flash the bios, and re-set the configuration.
If the above does not pertain, then what hardrives have NVRAM? Are you
writing about solid-state (i.e., platterless) hard drives or hard drives
that utilize flash technology?