Hiya!

 

I'm transferring 3TB from one array drive to another using the unbalance plugin (basically rsync).  All drives are 8TB WD RED 3.5".  I have two parity drives in my array.  I'm averaging about 50MB/s transfer rate.  This seems incredibly slow...

 

Thoughts?

Sounds not atypical to me    
 

Do you have Turbo write mode enabled as it might give a bit more speed (at the expense of keeping all drives spinning).

43 minutes ago, itimpi said:

Sounds not atypical to me    
 

Do you have Turbo write mode enabled as it might give a bit more speed (at the expense of keeping all drives spinning).

 

I do have turbo write enabled.  Tested both with and without.  Sadly, the results are no different...

 

Since the last changes on v6.8 turbo write doesn't help much with array to array transfers, those will always be slow, try to plan things ahead as much as possible to avoid them, for large transfers and assuming backups exist it's faster to disable parity and re-sync when done.

1 minute ago, JorgeB said:

Since the last changes on v6.8 turbo write doesn't help much with array to array transfers, those will always be slow, try to plan things ahead as much as possible to avoid them, for large transfers and assuming backups exist it's faster to disable parity and re-sync when done.

 

Thanks for the response and advice!

 

Does having dual parity necessarily decrease the transfer rates on array transfers over single parity?

 

43 minutes ago, Green Dragon said:

Does having dual parity necessarily decrease the transfer rates on array transfers over single parity?

Normally make no difference unless you have a very low power processor.

1 hour ago, itimpi said:

Normally make no difference unless you have a very low power processor.

i5 10400 

Should be more than enough for this....