Extremely slow external disk surface test (39 MB / s)

[Bellerofonte]

Hi, I'm a new HD Sentinel user.

I bought a new 6GB HDD to connect via usb c 3.1.
When I started the quick tests the HDD was noisy but it stopped shortly after.
Then I started the test on the surface for write / read but, due to problems with the mains that forced me to restart the test a couple of times, I postponed to proceed to connect the disk to the UPS.

Restarted the test with the disk connected to the UPS to my surprise I observed a speed of execution of the write test of 39 mb / s, with an estimate for completion of 89 hours!
The previous day I observed speeds of 150mb / s and an estimate of the time it would take to complete the test of 16 hours.

Why this difference?

[hdsentinel]

This suggests that only USB 2.0 speed used by the drive.
Not sure, but there may be a problem with connection and/or USB cable which caused that the disk drive works at slower speed.
I'd try to disconnect and reconnect - as yes, the speed should be much faster.

If you use Report menu -> Send test report to developer option, it is possible to check the actual situation and advise.

[Bellerofonte]

I changed the enclosure (same model) and now the speed is 196MB / s

Best