MP 7,1 OWC Accelsior 4M2 Speed Compared to SATA Hard Drive?

[choreo]

I am confused. When I go to the OWC website it advertises:

Accelsior 4M2 at Over 6000MB/s (theoretical), and most of the SATA Hard Drives at 6.0Gb/s (example: 4.0TB Toshiba MD04ACA Series 3.5-inch SATA 6.0Gb/s 7200RPM Hard Drive).

Isn't 6000MB/s the same as 6.0Gb/s? Surely the Accelsior is much faster than a hard drive? What do I have wrong?

 

[tsialex]

This is basic: 6.0Gb = 6 gigabits = 600MB/s (8b/10b encoding).

No spinning drive today can get sustained transfer speeds over 300MB/s , the best enterprise drives are around 270MB/s. Only data inside of the cache can be transferred faster, anything that needs to be read from the platters are slower than 300MB/s.

SATAIII (SATA3, SATA 600, 6.0Gb/s, etc) theoretical throughput of 600MB/s is not really even possible since there are overheads and real throughput is around 530 to 550MB/s with a very good SATA SSD like Samsung 860 PRO.

Edit:
Added 8b/10b encoding to clarify 600MB/s.

 

[choreo]

This is basic: 6.0Gb = 6 gigabits = 600MB/s.

No spinning drive today can get sustained transfer speeds over 300MB/s , the best enterprise drives are around 270MB/s. Only data inside of the cache can be transferred faster, anything that needs to be read from the platters are slower than 300MB/s.

SATAIII (SATA3, SATA 600, 6.0Gb/s, etc) theoretical throughput of 600MB/s is not really even possible since there are overheads and real throughput is around 530 to 550MB/s with a very good SATA SSD like Samsung 860 PRO.

Thanks, I figured I must have something really wrong. I used an online converter, but must have input something incorrectly.

 

[tsialex]

Thanks, I figured I must have something really wrong. I used an online converter, but must have input something incorrectly.

No need to use any converter, since:

b/s = bits/s
B/s = bytes/s.