I just bought 4 x WD20EARS-00MWVWB0 drives and I’ve just noticed that one of the drives are different to the others.
3 drives has the firmware: 50.0AB50
1 drive has the firmware: 09570115
The 50.0AB50 drives all show health status, temperature, power on count/hours and display SMART data and have
Standard: ATA8-ACS | ----
Supported Features: S.M.A.R.T., 48bit LBA, AAM, NCQ
The 09570115 drive, does NOT show health status, temperature, power on count/hours nor SMART data and have
Standard: ATA/ATAPI-7 | —
Supported Features: S.M.A.R.T., 48bit LBA, APM,
The weird drive seems to be working, but I’m thinking that I should return it as it seems to be dodgy and maybe have some pre-release firmware and should never have made it into the market.