What is the speed of SATA on RAID HP Smart Array P812?

Question

Hard disks

Hello.
Prompt on raid there was such situation.
Worth Smart Array P420i
It is planned to connect a disk shelf. But this option does not have SFF-8088.
We decided to install a second RAID with the same connector.
In stock there is an HP Smart ArrayP212 with one external SFF-8088
And in the HP Smart Array P812 store with 4 external SFF-8088

And that's the question.

Both are in the description.

Eight SAS/SATA physical links, each supporting 6, 3, and 1.5 Gb/s for SAS protocol and 3 and 1.5 Gb/s for SATA protocol

Now we use sata disks. What is the actual speed.
Since the HP Smart Array P420i is currently in operation, a SATA HDD is connected to it and the information about the disk indicates Transfer rate 6 Gb / s.

And even passing on sas I watch disks. There Interface, Gbit / s 12.
Which controller to choose fresher that will work with the DL380 G8

Answer 1

So you have hard drives and not ssd, they have a speed at the best of times at the peak of only 200 mbs, that is, 2 gigabits, and there are generally six and 3 gigabits, when they physically cannot achieve this, the speed of the interface is not equal to the speed of the disk, do you even have loads that read at a speed of 600 megabytes per second?