Is write speed of 60-68 MB/s normal using Unbalance without parity?

[jang430]

I'm writing to a WD Red drive 2 TB, WD20EFRX. 

Another clarification is, without parity, it's just like normal copy.  I believe they say Sata 3 reaches 600 MB/s, but according to all, we will not even reach sata 2 speeds, which is 300 MB/s.  Does it mean we're only reaching 60-70 MB/s?  Or is it because I'm using a super old model?  I assume my reading from a sata 2 drive isn't causing any delay in writing to this WD RED nas drive.

Edited October 6, 2018 by jang430

[itimpi]

No hard drives can reach even SATA2 speeds so the limiting factor is what speed the drives themselves can do.   The copy speed will be determined by which is the slower of the source and destination drives.

[jang430]

I assume speeds I showed is normal?

[bastl]

The averrage read speed for that disk is 119MB/s and write is 111MB/s and the mixed IO speed is around 70MB/s. If you only transferring big files i guess you will see higher speeds and yours are basically the speeds for the mixed IO. So it looks normal. 

 

http://hdd.userbenchmark.com/WD-Red-2TB-2012/Rating/1789

[jang430]

Thanks @bastl!

[JorgeB]

47 minutes ago, NAStyBox said:

yet the speed is the same lousy 68mb.

That's about normal with parity present.

[itimpi]

2 hours ago, NAStyBox said:

This can't possibly be the drives. 

You might find this section of the online documentation that can be accessed via the Manual link at the bottom of the GUI illuminating as to why you will never get anything close to drive speeds when writing to an Unraid parity protected array.