3 ms·
> There's a presumed ~2W difference in power consumption between 5.4K and 7.2K drives. Is that purely extra friction due to higher speed? Or is it spin up from
by ballenf 6y ago
> There's a presumed ~2W difference in power consumption between 5.4K and 7.2K drives.
Is that purely extra friction due to higher speed? Or is it spin up from sleep needing more power?
- bayindirh 6y agoIf we consider WD80EFAX [0], which is one of the suspect drives, that figure is for idle power consumption where disk is spinning but heads are not doing anything. So, that difference is for sustaining higher spindle speeds. The peak power requirement is 1.79A (~21.5W) which is probably consumed when starting from full-stop state (stand-by, sleep or power-off where motor is turned off). [0]: https://media.flixcar.com/f360cdn/Western_Digital-3805661149-eng_spec_data_sheet_2879-800002.pdf https://media.flixcar.com/f360cdn/Western_Digital-3805661149... [0]: https://products.wdc.com/library/SpecSheet/ENG/2879-800002.pdf https://products.wdc.com/library/SpecSheet/ENG/2879-800002.p...