История изменений
Исправление greenman, (текущая версия) :
А в обсуждении по ссылке приведённой выше пинают Сигейт
We have both HGST and Seagate helium-filled hard drives, but only the HGST drives currently report the SMART 22 attribute.
Кстати там есть ссылка на патент датчика измерения содержания гелия. Да, фактически теплопроводность измеряется. С учётом того, что у гелия в семь раз выше, чем у воздуха, разницу измерить не так сложно.
Из патента:
A method to detect helium leakage from a disk drive enclosure is disclosed and claimed. A measurement electrical current is passed through a temperature sensor disposed within the disk drive enclosure. A reference electrical resistance corresponds to a reference temperature of the temperature sensor. A heating electrical current is passed through the temperature sensor. A heated electrical resistance of the temperature sensor, corresponding to a heated temperature of the temperature sensor that exceeds the reference temperature by at least 5° C., is determined. A value that corresponds to a quantity of helium within the disk drive enclosure is determined based on the reference electrical resistance and heated electrical resistance.
Но:
However, nowhere on the official HDD vendor sites (or associate sites), I found what exactly the specific value in ID22 means.
Кстати, патент во многом повторяет известные методы измерения вакуума
Исправление greenman, :
А в обсуждении по ссылке приведённой выше пинают Сигейт
We have both HGST and Seagate helium-filled hard drives, but only the HGST drives currently report the SMART 22 attribute.
Кстати там есть ссылка на патент датчика измерения содержания гелия. Да, фактически теплопроводность измеряется. С учётом того, что у гелия в семь раз выше, чем у воздуха, разницу измерить не так сложно.
Из патента:
A method to detect helium leakage from a disk drive enclosure is disclosed and claimed. A measurement electrical current is passed through a temperature sensor disposed within the disk drive enclosure. A reference electrical resistance corresponds to a reference temperature of the temperature sensor. A heating electrical current is passed through the temperature sensor. A heated electrical resistance of the temperature sensor, corresponding to a heated temperature of the temperature sensor that exceeds the reference temperature by at least 5° C., is determined. A value that corresponds to a quantity of helium within the disk drive enclosure is determined based on the reference electrical resistance and heated electrical resistance.
Но:
However, nowhere on the official HDD vendor sites (or associate sites), I found what exactly the specific value in ID22 means.
Кстати, патент фактически повторяет терморезисторный метод измерения вакуума
Исправление greenman, :
А в обсуждении по ссылке приведённой выше пишут наоборот
We have both HGST and Seagate helium-filled hard drives, but only the HGST drives currently report the SMART 22 attribute.
Кстати там есть ссылка на патент датчика измерения содержания гелия. Да, фактически теплопроводность измеряется. С учётом того, что у гелия в семь раз выше, чем у воздуха, разницу измерить не так сложно.
Из патента:
A method to detect helium leakage from a disk drive enclosure is disclosed and claimed. A measurement electrical current is passed through a temperature sensor disposed within the disk drive enclosure. A reference electrical resistance corresponds to a reference temperature of the temperature sensor. A heating electrical current is passed through the temperature sensor. A heated electrical resistance of the temperature sensor, corresponding to a heated temperature of the temperature sensor that exceeds the reference temperature by at least 5° C., is determined. A value that corresponds to a quantity of helium within the disk drive enclosure is determined based on the reference electrical resistance and heated electrical resistance.
Но:
However, nowhere on the official HDD vendor sites (or associate sites), I found what exactly the specific value in ID22 means.
Кстати, патент фактически повторяет терморезисторный метод измерения вакуума
Исходная версия greenman, :
А в обсуждении по ссылке приведённой выше пишут наоборот
We have both HGST and Seagate helium-filled hard drives, but only the HGST drives currently report the SMART 22 attribute.
Кстати там есть ссылка на патент датчика измерения содержания гелия. Да, фактически теплопроводность измеряется. С учётом того, что у гелия в семь раз выше, чем у воздуха, разницу измерить не так сложно.
Из патента:
A method to detect helium leakage from a disk drive enclosure is disclosed and claimed. A measurement electrical current is passed through a temperature sensor disposed within the disk drive enclosure. A reference electrical resistance corresponds to a reference temperature of the temperature sensor. A heating electrical current is passed through the temperature sensor. A heated electrical resistance of the temperature sensor, corresponding to a heated temperature of the temperature sensor that exceeds the reference temperature by at least 5° C., is determined. A value that corresponds to a quantity of helium within the disk drive enclosure is determined based on the reference electrical resistance and heated electrical resistance.
Но:
However, nowhere on the official HDD vendor sites (or associate sites), I found what exactly the specific value in ID22 means.