As far as I know, all hard drives report the current temperature (in hexadecimal) in low order byte of the temperature raw data. However some drives seem to also report the temperature (in decimal) in the "value" field, and what looks like the historical maximum temperature in the "worst" field.
For example my seagate drives look like they report the actual temperature in the "value" and "worst" fields, but my WD and Hitachi drives seem to just use some kind of generic health value that counts down in those fields.
So just wondering, is there a way to get the historical maximum operating temperature from smart for all drives. Or is it only certain drives (like some Seagates) that provide this smart info?