Solved! HGST, HUA723030ALA640, different reading and writing speed.

[Nikon1234]

Hi.

Recently, I bought two HGST, HUA723030ALA640 used hard drives from ebay. When I tested the speed, I got the following from CrystalDiskMark:

Reading: ~150MB/s
Writing: ~15MB/s.

why is the reading speed ten times faster than that of writing?

on the label it only states: [sata].

Not like my other Hitachi drive (~150 MB/s for both writing and reading), which on the label states: [sata 6.0 Gb/s].

is it possible that [sata 6.0 Gb/s] stands for the 3rd generation of the interface

[sata] stands for the first generation of the interface.

My assumption does not explain why the Reading speed is on par ~150MB/s.

thanks for your help.

 

[helpstar]

The HUA723030ALA640 is a SATA 3 (6Gb/s) HDD
https://documents.westerndigital.co...r-sata-series/data-sheet-ultrastar-7k3000.pdf

The speed should be 150MB/s read and write

are you sure both are the same model?

take a picture of both HDD´s label, upload to imgur.com and post the link