SDD in place of the HDD speed?

Now I have sdd in place of drive (sata 2) and an hdd in its place(sata 3). The question is: if I put the OS on the sdd, and then swap them - there would be some loss in speed or any other consequences?
July 8th 19 at 15:40
3 answers
July 8th 19 at 15:42
Losses in speed will not be an increase in the reading / writing large files, since you SSD from the sata2 slot, move the slot sata3 that's faster than sata2. In General, you could put termotehnik in place of hdd and hdd in place of the drive.
I understand, well, that doesn't matter is the OS installed on the sdd connected to SATA 3 or SATA 2, if after a while she would in any case be connected to SATA 3? - lonny_Murr commented on July 8th 19 at 15:45
no, for OS this speed is not as important as say to copy a large file. OS operates with small files, and such operations do not reach high speeds. - casandra.Kemmer commented on July 8th 19 at 15:48
July 8th 19 at 15:44
Will not. Generally without a difference.

Let me explain.
2 SATA standard provides data transfer rate up to 300 MB/s.
The maximum possible speed of the average SSD 500Мбайт/s
The maximum possible speed of the average HDD-150Мбайт/s
These speeds are achievable assuming only sequential read and write large files.

Firstly, this happens very rarely, and the most high, where you can copy a large file from the SSD is on the HDD, so still the speed will be not more than 150Мбайт/s

Secondly, the majority of transactions (more than 90% of all operations) is a random reading and writing small blocks with a size of around 4KB.
Such operations are performed on the SSD rate 15-60Мбайт/sand HDD with a speed of 0,3-1,5 MB/s
That in any case many times less than the throughput of interface SATA2

Therefore, in the vast majority of cases, except for narrowly specialized systems, the difference between SATA2 and SATA3 for the average user no.
So, have you checked when the mother changed... - lonny_Murr commented on July 8th 19 at 15:47
July 8th 19 at 15:46
the difference between sata 2 and 3 3 and 6 gb/s, respectively, if used UZB case put HDD instead of DVD and SSD in place of HDD, a DVD Raziel max speed is 1.2 gb/s

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