Copy to array slow

[Neogola]

Hi,

 

i have a new server and the copy from another nas (Synology) with the media files to the array is slow 50MB/s - max.70MB/s. Copy from the Synology to my local pc 110-113MB/s. I have only gigabit switches and for this devices is the same switch

 

CPU: E5-2650

MB: Asus Z9PA-U8

RAM :16GB ECC

4x4TB +1x5TB-Parity

Parity is valid

Cache: NO (i activate the Cache after the Migration from the files many terabyte)

 

         

 

I have 1xSSD for Cache and i try copy from the Synology to the Cache (appdate) and the speed is 50-70MB/s again.

 

Thank you

 

 

 

[itimpi]

That is all you can expect when copying to the parity protected array disks (each write to such disks involves 2 reads and 2 writes).  Yon can speed this up by enabling Turbo Write mode (at the expense of keeping the array disks spinning.  Activating a cache disk also speeds up the perceived speed by delaying the writes to the array drives to later when mover runs.

[Neogola]

i activate the cache for this share and test again, copy speed 110MB/s to cache YES. But i have a new question i push the mover Button and he copy 48GB to the array but all files of one disk.

I think it would be better to split the data on all the hard disks

 

 

 

[itimpi]

i activate the cache for this share and test again, copy speed 110MB/s to cache YES. But i have a new question i push the mover Button and he copy 48GB to the array but all files of one disk.

I think it would be better to split the data on all the hard disks

 

 

how files are spread across disks depends on the Allocation method and Split Level settings you choose for a share.    You should read up on how these work in the online documentation. 

[JorgeB]

I think it would be better to split the data on all the hard disks

 

Data is going to be split according to the allocation method select for that share, you can chose most free to do that, but in my experience writes are much slower because the parity disk writes will overlap.

[Neogola]

You mean the point "Allocation method:"

What is your recommend for a share with many media stuff at the moment 10TB (movies, tv shows)

[trurl]

Default allocation method of high-water is probably the best. I can also see a good argument for fill up. People often think they want most free (which would do what you think you want, spread across all disks), but I don't think there is really a good reason to do that.

[Neogola]

Thank you and i think i try it with high-water