Re: Reading an old HDD

[Hans <hans.ullrich@loop.de>]

For 3,5" HDD you need an usb-case with extra power. The standard usb power is 
not enough for this needed power. 


Most usp ports deliver about 50-70mA at 5V, so you must use a case with an 
external power supply.

This is also needed for eSATA ports.

Hans
> 
> The smallest 3.5" HDD (3 TB) for which I found official Seagate
> documentation said that it used 8 watts while operating.
> 
> https://storedbits.com says a 7200 RPM hard drive would normally consume
> 20-25W for 5-10 seconds during startup.  It will then idle at around
> 6-8 watts.  The average power consumption during read/write tasks
> will be around 8-12 watts, and the maximum can go up to 16 watts.
> 
> I would be surprised if the transformer for the enclosure
> did not deliver sufficient power for the type of
> drive that the enclosure is intended to enclose.
> 
> I have tried multiple USB jacks on the computer, of course.