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Readynas Duo V2 speed drop

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Carnagerover

Senior Member
My ReadyNas Duo V2 has dropped 20MB/s in write speeds and I cannot figure out why. The Readynas Duo V2 and my main PC go into the same switch which is a Netgear Prosafe GS105 Gigabit switch. I also have a Cat5e cable that then connects the switch to my router. However even when the router connection is removed from the switch I still have the low transfer rate, here are the specs of my computer;

PC specs
Intel I7 2600k at 4.5ghz
Asus Maximus Extreme Z - 2Gigabit ports
Palit GTX 680
Corsair Neutron 120gb SSD
Corsair force gt 120 SSD
Western digital black 2TB
Western Digital green 2TB
16gb corsair vengence 1866mhz

My previous Write speed to the Readynas V2 was 59MB/s and my Read speed was around 100MB/s. As stated now im around 40MB/s both ways. I cannot figure out what has happened. I have tried to downgrade to a previous firmware with no luck. I have no apps or anything running on the Duo V2 so I don't understand where the speed has gone?

Here is what a transfer looks like now;

http://img844.imageshack.us/img844/3792/readynas.jpg
 
Is the NAS filling up? Also check to make sure that NAS volume or drives aren't throwing errors.

Are your PC to PC transfers still ok? Need to rule out a possible bad switch.
 
Is the NAS filling up? Also check to make sure that NAS volume or drives aren't throwing errors.

Are your PC to PC transfers still ok? Need to rule out a possible bad switch.

Hi and thanks for the reply,

Here is the HDD information from the NAS;

http://img856.imageshack.us/img856/5862/nashdd.jpg

It does appear to have some Raw Read Errors, I moved my downstairs GS105 upstairs to rule out the switch as the issue and had the same low writes and reads. I only have one PC which is my gaming PC other than that it is just ipads so I can't test a PC to PC transfer unfortunately. I did also plug the Readynas Duo V2 directly into my Asus N66U to test if that made a difference and it also did not.The NAS has 120Gb free of 913Gb, wonder if its just the HDD in the NAS, however I didnt think that HDDs really slowed down that much over time.
 
Sounds like you ruled out the GS105 as the problem.

Can you remember the events leading up to the slowdown? Did you do a large
file/folder copy? Change something else?

You might try a reboot of the NAS and have it check the volume on reboot.
 
Sounds like you ruled out the GS105 as the problem.

Can you remember the events leading up to the slowdown? Did you do a large
file/folder copy? Change something else?

You might try a reboot of the NAS and have it check the volume on reboot.

Hi,

Yes the GS105 is not the culprit, here is the log from the volume scan;

***** File system check forced at Tue Dec 4 06:30:16 PST 2012 *****
fsck from util-linux-ng 2.17.2
e2fsck 1.41.14 (22-Dec-2010)
Pass 1: Checking inodes, blocks, and sizes
Inode 2491170, i_blocks is 716824, should be 716832. Fix? yes

Inode 2491172, i_blocks is 40, should be 32. Fix? yes

Inode 2491194, i_blocks is 716784, should be 716792. Fix? yes

Inode 2491199, i_blocks is 716784, should be 716792. Fix? yes

Inode 2491204, i_blocks is 716768, should be 716776. Fix? yes

Inode 2491209, i_blocks is 716760, should be 716768. Fix? yes

Inode 2491214, i_blocks is 715312, should be 715320. Fix? yes

Inode 2491219, i_blocks is 716864, should be 716872. Fix? yes

Inode 2491224, i_blocks is 716768, should be 716776. Fix? yes

Inode 2491229, i_blocks is 716768, should be 716776. Fix? yes

Inode 2491234, i_blocks is 716872, should be 716880. Fix? yes

Inode 2491239, i_blocks is 716808, should be 716816. Fix? yes

Inode 2491244, i_blocks is 716784, should be 716792. Fix? yes

Inode 2491249, i_blocks is 716896, should be 716904. Fix? yes

Inode 2491254, i_blocks is 716800, should be 716808. Fix? yes

Inode 2491259, i_blocks is 716872, should be 716880. Fix? yes

Inode 2491264, i_blocks is 716808, should be 716816. Fix? yes

Inode 2491269, i_blocks is 716856, should be 716864. Fix? yes

Inode 2491274, i_blocks is 716896, should be 716904. Fix? yes

Inode 2491279, i_blocks is 716800, should be 716808. Fix? yes

Inode 2491284, i_blocks is 716872, should be 716880. Fix? yes

Inode 2491289, i_blocks is 716896, should be 716904. Fix? yes

Inode 2491294, i_blocks is 716824, should be 716832. Fix? yes

Inode 2491299, i_blocks is 716848, should be 716856. Fix? yes

Inode 2491366, i_blocks is 580416, should be 580424. Fix? yes

Inode 2491370, i_blocks is 564144, should be 564152. Fix? yes

Inode 2491372, i_blocks is 595296, should be 595304. Fix? yes

Inode 2491373, i_blocks is 559984, should be 559992. Fix? yes

Inode 2491374, i_blocks is 590904, should be 590912. Fix? yes

Inode 2491387, i_blocks is 575392, should be 575408. Fix? yes

Inode 2491391, i_blocks is 593520, should be 593528. Fix? yes

Inode 2491396, i_blocks is 574480, should be 574488. Fix? yes

Inode 2493520, i_blocks is 600936, should be 600944. Fix? yes

Inode 2493532, i_blocks is 769552, should be 769560. Fix? yes

Inode 2493557, i_blocks is 833912, should be 833920. Fix? yes

Inode 2493564, i_blocks is 535600, should be 535608. Fix? yes

Inode 2493602, i_blocks is 40, should be 32. Fix? yes

Inode 2523323, i_blocks is 517240, should be 517248. Fix? yes

Inode 2523404, i_blocks is 670048, should be 670056. Fix? yes

Inode 2752520, i_blocks is 358560, should be 358568. Fix? yes

Inode 2752531, i_blocks is 358720, should be 358728. Fix? yes

Inode 2850819, i_blocks is 354400, should be 354408. Fix? yes

Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information

/dev/mapper/c-c: ***** FILE SYSTEM WAS MODIFIED *****
/dev/mapper/c-c: 3828/15024128 files (1.4% non-contiguous), 208735405/240386048 blocks

The speed is around 30MB/s still after that, the only thing that changed when I noticed the performance dropped was that a moved the Duo V2 from being connected directly to the N66U to being on the same upstairs switch so that all the traffic could be handled on the switch rather than going between the CAT5e cable that carries the connection to my router and back.

I have put the Duo V2 back downstairs to no avail and tried unplugging the downstairs CAT5e cable so only the DuoV2 and my PC are connected upstairs and still no improvement. I am also on Windows 8 now however I have had normal performance on Windows 8 so I don't think that is the problem.

I am stumped as to what has happened?
 
I am also on Windows 8 now however I have had normal performance on Windows 8 so I don't think that is the problem.

I am stumped as to what has happened?
Jeez, Louise, man! That's not a minor change!

I would not be stumped until I eliminated the Win 7 > Win 8 change. Not easy to do, though.
 
I have just been copying some files onto my new Western Digital 3TB drive that I installed today, all of them are large single movie files and the transfer rate is still 32MBs, as I have already ruled out the switch as the cause of the problem is it safe to say that the NAS is definitely the problem in this case.
 
So you rule out the Win 7 > Win 8 change too without reverting?

I haven't really thought too much into the clean install of windows 8 as it was working at full speed on the newer operating system. I can't reinstall this machine as it is vital for the day to day work I do. I also have no way to try this on another machine as I do not know anyone else with a PC capable of testing Gigabit speeds.

I would have thought however that with the NAS copying from one HDD to another on the NAS that would rule out my PC as the problem but I could be wrong :eek:

Thinking about this more am I write to assume that the traffic still passes through my PC as I initiated it on there so my PC is still a factor?
 
Last edited:
You would need to use a file management or backup feature on the NAS itself in order to have your PC completely out of the loop
 
You would need to use a file management or backup feature on the NAS itself in order to have your PC completely out of the loop

Looks like I didn't got back far enough when downgrading the firmware, it would seem that since they have added features like ReadyDrop and other such suchness it must be eating CPU cycles as I have gone to 5.3.5 and I'm back in business :)
 

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You didn't say that you upgraded the ReadyNAS firmware when I asked what had changed.

That is not the way to get people (at least me) to help you in the future.
 
You didn't say that you upgraded the ReadyNAS firmware when I asked what had changed.

That is not the way to get people (at least me) to help you in the future.

I say in the first that I downgraded the firmware to a previous firmware, I wasn't aware there had been two firmware updates as its pretty automated on the Duo V2. I thought I had ruled that out, I am indeed only human and apologize for taking up your time.
 

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