Unusally slow write speeds

[Rubicant]

I've been having nothing but problems since I swapped out my cache drives with a pair of Intel NVME drives...now my write speeds are insanely slow moving files from drive to drive on the array.  Would yall mind taking a look at my diagnostics and seeing if Im missing anyhting..cause it shouldnt take 3 hours to transfer 44GB from one disk to another.   

 

Of note, the array is presently regenerating the two parity disks..but that's never affected my write speeds that badly...

 

Am I missing something?

 

Please help.

 

Thanks :)

blake-diagnostics-20200726-1951.zip

[JorgeB]

7 hours ago, Rubicant said:

but that's never affected my write speeds that badly...

It should, wait for the sync to finish and try again.

[trurl]

You mention changing cache but you don't say whether cache is involved in the transfer and what is source or destination. 

[Rubicant]

Cache is involved in the transfer I think, but my results were slewed by the ongoing parity rebuild.  I’ll check it once the parity rebuilds, and I have a 100% apples to apples comparison of the transfer and file set.

[trurl]

1 hour ago, Rubicant said:

Cache is involved in the transfer I think

Why do you think that? If you are transferring between disks on the server, only the source and destination disks are involved (and possibly parity. So if your source or your destination is cache, then of course cache is involved.

 

Otherwise, the only way cache might be involved is if your destination is a cache-yes or cache-prefer user share. And you MUST NOT mix disks and user shares when moving or copying files.