如何让我的SATA硬盘启用完整的6 Gbit/s模式？

我现在在用一块老款的WD My Book硬盘（具体版本没搞清楚，但大概率是那款网上教人拆外壳的型号），里面装的是一块2TB的WD硬盘，通过Mini USB-B转USB-A线连接到我的PC上。我跑了一次短版的smartctl测试，结果如下：

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Green
Device Model:     WDC WD20EZRX-00DC0B0
Serial Number:    WD-WMC1T2926965
LU WWN Device Id: 5 0014ee 6add623cf
Firmware Version: 80.00A80
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        In smartctl database 7.3/5319
ATA Version is:   ACS-2 (minor revision not indicated)

备注：内容来源于stack exchange，提问作者Masamune