Hi,I just updated my Readynas Ultra 4 to OS 6, and am now experiencing a huge performance difference.Previously, I could read at around 110MB/s constantly over a gigabit connection. Now, I barely make 40, and even then speeds are very inconsistent. I have tried different configurations such as Teaming (multiple methods), changing MTU and the likes. Operations can sometimes start fast and then get exponentially slower (sometimes even stop completely) then start back up again at reduced speeds. Both SMB and NFS show similar bad speeds.Write speeds suffer similarly, being both slow and inconsistent.I am wondering if this has anything to do with BTRFS, or if there is anything I can do to fix this issue.I am using WD Green drivesx3, running RAID-5 (XRAID2) on a fresh install of 6.0.4.I know Ultra 4 on OS 6 isn't supported, just wondering if such a performance drop is expected.

6.0.5 is due for release soon. You may wish to check the performance on that once it has been released.If the performance is too slow for you you can go back to 4.2.x firmware but that would require another factory default (wipes all data, settings, everything).

Yeah, hopefully 6.0.5 does improve things (raw I/O speed wise). I've tried changing just about every setting short of changing to Flex-raid, nothing seems to provide reliable speeds.Sometimes I can achieve ~80MB/s, sometimes I can't. CPU usage wise SMB usually uses around 20-30% when doing operations.Here are some transfer screenshots (using SMB obviously). Connected via direct 3M CAT6 gigabit line/9000 MTU.I've also tried disabling the WDIDLE3 timeout on the drives, enabling write caching etc... but still have this inconsistent speed.

Would it be worth replacing these drives with WD Red drives?I'm guessing they will perform better and be much more future-proof, however, I would still hope performance is the same (or better, of course!) as 4.2.

What disks are you using at the moment?WD RED disks aren't the best disks performance wise but they are designed for NAS use.I don't expect changing the disks would have much impact on performance.

3x WD20EARX Caviar Green's (2TB).We just found something interesting - on a client running Linux Mint 14 transfer speeds reported 30-40MB/s (AKA terrible) performance, however on the same system running Windows transfer speeds were 80-90 as expected.Just something to add.Also, I noticed that one of my disks were occasionally (once or twice every 10-15 mins I think - more often at the moment) clicking somewhat noticeably, which I guess could be a sign that it should be replaced.The disks are around 2-3 years old by now.

Readynas OS 6 Massive Performance Decrease

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blumman
Aspirant
Oct 20, 2013
I have a Ultra 4 Plus and with 4.2.22 I had read/write speeds close to 100 MB/s with 4xWD20EARS (Green). I have now replaced those with 4xWD40EFRX (Red) and updated to 4.2.24, I'm noticing a small performance decrease. I'm now seeing speeds in the 75-80MB/s range. I don't know if it's the new firmware or the disks. According to various storage reviews that I have read the Red's are suppose to be a little bit faster. In any event that's not why I'm posting.

Due to Debian Etch being an old OS I'm no longer able to use certain Debian Etch repositories, which lead me to think that it might be worth trying ReadyNAS OS6. What's your take on it so far besides the performance decrease? Is it "worth" upgrading?
mdgm-ntgr
NETGEAR Employee Retired
Oct 20, 2013
With vertical expansion (assuming you replaced the disks one by one) you would have an additional RAID layer which would probably mean some performance hit.

You could backup your data and try ReadyNAS OS. If you don't like it you could downgrade again (I can supply an image to downgrade, and this would also require a factory default).
blumman
Aspirant
Oct 20, 2013
No I created a new volume from scratch but I just remembered that haven't gone through the optimization guide yet (was quite some time I ago I setup the NAS originally).

http://kb.netgear.com/app/answers/detai ... erformance

If you could provide me with the downgrade that would be awesome. I have my data backed up. I'm just in the transition of restoring but I think I'd like to try out OS 6. Etch is EoL and is just causing me problems in terms of working with the CLI. I'm already doing unsupported stuff so what the heck. :)
Bob_K
Tutor
Aug 24, 2014
You're not alone, hando. I just upgraded my Ultra 4 to OS 6.1.9. With OS 4 I could obtain 60-80 MBps on writes of very large files. With OS 6, I'm barely getting 25-30 MBps. XRAID. I turned off Checksum copying and Antivirus checking. I haven't made any other software or hardware changes. Weird.
StephenB
Guru - Experienced User
Aug 24, 2014
Bob K, try turning off the snapshots and see if that helps.
Pasala
Aspirant
Oct 06, 2014
Is there anything new concerning the speed issue?

Pro Prioneer NAS with 6x 3TB drives in XRAID2 and 6.2.0 beta firmware can only pump 30-50 MB/s. :(

Are there tweaks to get it to back 100 MB/s like it was with the old RAIDiator firmware?
StephenB
Guru - Experienced User
Oct 06, 2014
Are you reading or writing?
mdgm-ntgr
NETGEAR Employee Retired
Oct 06, 2014
Is your volume redundant? If the array is syncing performance will be slower than usual.
Pasala
Aspirant
Oct 06, 2014
30 - 50 MB/s is write speed with smb and a Linux client.

The read speed with a Mac OS X client and afp is at a very good 100+ MB/s.
The write speed with Mac and afp is higher too.
So it is probalby a SAMBA or Linux issue.

Anti Virus and snapshots are turned off with just the new ( OS 6.2.0 beta ) bitrot protection.

If it runs stable it will be probably ok.

Regards.
mdgm-ntgr
NETGEAR Employee Retired
Oct 06, 2014
Bitrot protection does have an impact on write speed, as when files are written it needs to calculate the checksum etc.

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Readynas OS 6 Massive Performance Decrease

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