ReadyNas 204 fluctuating transfer rate

Raid 1

Running a 4000MB file write on \\192.168.1.164\
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Average (W): 106.59 MB/sec
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Running a 4000MB file read on \\192.168.1.164\
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Average (R): 113.23 MB/sec
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Raid 2

Running warmup...
Running a 4000MB file write on \\192.168.1.164\
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Average (W): 24.59 MB/sec
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Running a 4000MB file read on \\192.168.1.164\
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Average (R): 72.46 MB/sec
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The health on the hard drives are both fine. Anyway to allow to copy to RAM first then to drive ?

I agree you've ruled out the network.  Disk I/O is already cached in ram.  Though of course you do want the data moved to the disk promptly, otherwise data corruption occurs on power fail/unexpected shutdown.

Does "healthy" drives mean no reallocated/pending sectors and no ATA errors?

How full is the under-performing RAID array?  What drive models are you using?

I am using wd red drives 4tb each WD40EFRX. The drives are pretty much empty, I just purchased the NAS and was trying to dump files on when noticing the speed differences. Pretty much the status just says healthy. 

Do you think it will make a difference if switching to Black Drives? I know the reds are only 5400rpms. but then again that doesnt solve the reason why only one raid is slower then the other. I reformated the raid again and still same issue. 

I wonder if its due to SMB share, I havent tested AFP or anything else yet. I did notice my Windows 10 machine doesnt prompt for login when mapping to the drive. It only displays public folders unless I map directly to a privialaged folder then it promps for login. I also noticed that if I dont force it to login the puclic read/write folders will not allow me to dump big files it says the disk is full, when more then 3TBs are left. Small text files work fine and creating folders.

Any Ideas?

Thank

I don't think its the drive model (since they are the same in both arrays).  And Reds give good performance.

You could try the volume maintenance (defrag, balance, scrub).  If you have a backup, you could also try destroying/recreating the volume.

What apps are installed?  Is the slow array the first one or the second?  

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07stuntar1 wrote:

 I did notice my Windows 10 machine doesnt prompt for login when mapping to the drive. It only displays public folders unless I map directly to a privialaged folder then it promps for login.

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What happens is that the Windows machine presents you windows logon/password to the NAS when you connect.  If that login is accepted by the NAS, then you get whatever permissions are assiociated with the logon.  If the username doesn't exist on the NAS, then if guest access is enabled, you'll get that,

If you want full access, then go into the Windows Credential manager, and create a windows credential for the NAS (using the username and the password you want).  You'll need to remove (or edit) whatever credentials already stored for the NAS.  Note also that the PC treats the NASNAME and the NASIPADDRESS as two different machines.  If you access both ways, you'll want to set up both credentials.  They can use either different user/passwords if you want.

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07stuntar1 wrote:

if I dont force it to login the puclic read/write folders will not allow me to dump big files it says the disk is full, when more then 3TBs are left. Small text files work fine and creating folders.

 

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What firmware are you running?  Do you have quotas enabled?

Thank you

Rebuild the volume still same problem. I also noticed it took alot longer to resync the drives. only app is plex, i removed it since i wasnt using it. 

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07stuntar1 wrote:

Rebuild the volume still same problem. I also noticed it took alot longer to resync the drives. only app is plex, i removed it since i wasnt using it. 

And the SMART stats are completely clean on both drives?