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Recent change - crawling slow speed accessing NAS
Although I have been plagued long term by the same problem others have posted about (slow browsing of large NAS directories on Mac OS) my NAS was behaving fairly well for its most common uses - streaming music or videos, including 1080p content. Recently those activities began to slow and degrade (not sure if this was instant or gradual as I've not been using my NAS a lot recently). Now the device appears completely normal but it basically useless. No music or movies can be viewed, directories take for ever to populate on my Mac (both for those Macs on WiFi and others wired to the network, including different generations and OSs). Copying large movie files from the NAS to a wired Mac on the network does not appear to be possible. speedtest.net shows plenty of bandwidth when accessing internet (again WiFi and wired, 10-20 Mbps). A very rough guess seems like a problem with the networking function in the NAS. All disks and fans show healthy and no problems. Tried several Mac and NAS reboots and no improvement.
Where/how to I even being to troubleshoot this?
I can certainly provide much more information but here are some basics. Other than updating to RAIDiator 4.2.23, I have not made any changes to my Macs, network nor NAS.
-ReadyNAS NVX
-Enable jumbo frames - off (its never been on AFAIK)
-Performance tab: Disk write cache and disable full journaling are checked enable fast USB is unchecked
-Just tried update to RAIDiator 4.2.23 - no improvement
-Using AFP
-X-RAID2, 4 disks, all 4 are Seagate ST32000644NS
-OSX 10.7.5 and 10.6.8
Thanks in advance.
Where/how to I even being to troubleshoot this?
I can certainly provide much more information but here are some basics. Other than updating to RAIDiator 4.2.23, I have not made any changes to my Macs, network nor NAS.
-ReadyNAS NVX
-Enable jumbo frames - off (its never been on AFAIK)
-Performance tab: Disk write cache and disable full journaling are checked enable fast USB is unchecked
-Just tried update to RAIDiator 4.2.23 - no improvement
-Using AFP
-X-RAID2, 4 disks, all 4 are Seagate ST32000644NS
-OSX 10.7.5 and 10.6.8
Thanks in advance.
24 Replies
Replies have been turned off for this discussion
- Ok. So what we know...
-It's not a full OS partition
-The data volume is not full
-There are no reported disk errors
-You see no errors on the network stats
-rebooting the NAS and the PCs makes no difference
-Its not jumbo frames
So the usual suspects all appear to be ruled out.
Maybe check to see if there is a process hogging the NAS CPU? Perhaps run top via ssh, and see what the CPU usage and load averages are. You can also check memory usage.
Another thing you can try is to reboot your router (and maybe power-cycle any switches). - ^ Thanks for the ongoing assistance. Much appreciated.
Rebooted router, modem and switch (that's all my networking gear) then top
top reports:
-About 20 PID line items
-Most using no CPU nor memory
-Largest consumption line is <1% CPU and <1% memory
(This was done during an attempt to copy from NAS to Mac wired)
I could provide a screen grab but it appears nothing OOTO.
So puzzling... Must be something simple here. It's like the NAS simply has NO bandwidth. - What does your initrd.log look like?
- ^ Of course, like everything else it takes many minutes to download it... :(
Here is the file content:
[2011/03/14 23:30:33] Factory default initiated by Frontview!
[2011/03/14 23:36:20] Updated from RAIDiator to 4.2.15.
[2011/05/03 20:45:52] Updated from RAIDiator 4.2.15 to 4.2.16.
[2011/05/20 05:07:34] Updated from RAIDiator 4.2.16 to 4.2.17.
[2011/09/20 01:14:02] Updated from RAIDiator 4.2.17 to 4.2.19.
[2011/10/05 08:03:55] Updated from RAIDiator 4.2.19 to 4.2.19.
[2012/03/01 03:06:42] Updated from RAIDiator 4.2.19 to 4.2.19.
[2012/03/21 20:12:17] Updated from RAIDiator 4.2.19 to 4.2.20-T42.
[2012/08/10 10:54:46] Updated from RAIDiator 4.2.20-T42 to 4.2.21.
[2012/12/07 17:00:15] Updated from RAIDiator 4.2.21 to 4.2.22.
[2013/06/23 04:03:40] Updated from RAIDiator 4.2.22 to 4.2.23.
And yes, these problems existed before the upgrade to 4.2.23 - Do you have an up to date backup?
- ^ Absolutely. Although I don't like where this is going... Thanks.
swamp2 wrote: ...Absolutely. Although I don't like where this is going...
We have no obvious root cause here, I think we've examined most of the possibilities. CPU/memory/Disk load caused by an unknown background task (some add-on perhaps) is the main thing we haven't looked at.
Though it is painful, a factory reset/restore from backup might be the thing to try next.- No guarantee that a total reset would fix the issue. Let's suppose a total reset does not. What additional diagnostics would be available?
Does anyone advise paying for a tech support call directly with Netgear (particularly before the full reset option)?
Thanks. - Bump.
Thanks to all for all prior help.
Surely there must be some additional diagnostics possible? - Other than checking NAS loading (CPU/memory/disk) via top, I am not thinking of much.
Lack of 802.1x flow control in the PC and switches can sometimes create slowdowns, but in your case the network hasn't changed, but the performance has.
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