Question Doubt eeprom and flash

[cloudff7ps1]

1. How long do EEPROM memories used in HDDs retain all data at a temperature of 36°C?
2. EEPROM, like flash, does the number of erases/writes have to do with the data retention time?
3. 2.5" and 3.5" HDDs use EEPROM or flash to store BIOS/firmware. What type of flash memory do they use? Is it the same type of flash for all HDDs that use this technology?

 

[CountMike]

1. How long do EEPROM memories used in HDDs retain all data at a temperature of 36°C?
2. EEPROM, like flash, does the number of erases/writes have to do with the data retention time?
3. 2.5" and 3.5" HDDs use EEPROM or flash to store BIOS/firmware. What type of flash memory do they use? Is it the same type of flash for all HDDs that use this technology?

EEPROM = Electrically Erasable Programmable Read Only Memory requiring much higher voltage to write than to read. Older types EPROM had a small window in the chip and could be erased by ultra violet light.
They are likely rated for 100c+while energized, much higher when not. Still much depends on their quality, not all are made equal. Read the stamped SKU and you should be able to research it. Memory is usually CMOS type (Complementary Metal-Oxide-Semiconductor), Older ones had limited number of writes, still do but much larger (in thousands). Unless damaged or specs exceeded, data retention is indefinite, They are still collection of simple transistors that could be electrically (re)formed to closed (1) or open (0). On chip controller is just ROM.