SSD and Enclosure's USB Type and SATA Type
2016-03-28
When we purchase SSD and enclosure if we want an external drive, we must know two important feature data: USB Type and SATA Type.
For SSD, we only have to consider SATA type; for enclosure, we will have to consider USB type and SATA type.
What is SATA ?
If you remember how you assemble a desktop pc in around 2000, you must know there were a kind of wide and thin cable which was used for connect the mother board and hard drive, the cable called PATA (Parellel AT Attachment); Now the computer bus interface changed, we use SATA (Serial AT Attachment) to connect computer mother board and hard drive (HDD) or SSD or optical drive.
(Image from cablewholesale.com)
## SATA I, II, III Speeds
Here we only focus on the speed of SATA.
| **SATA Type** | **Speed** |
| SATA I | 150 MB/s |
| SATA II | 300 MB/s |
| SATA III | 600 MB/s |
| **USB Type** | **Speed** |
| USB 2.0 | 60 MB/s |
| USB 3.0 | 625 MB/s |
| USB 3.1 | 1.25 GB/s |