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Forum Discussion
swamp2
Jun 22, 2013Tutor
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
- StephenBGuru - Experienced UserAre the ethernet stats on the NAS showing errors?
How about smart stats?
Maybe also try enabling ssh and looking at fullness of hte OS partition?
Speedtest would not be very useful here, as it measure the speed of your internet connection, not your local lan. - swamp2Tutor^Thanks
-No ethernet errors
-Smart stats OK, no growing reallocated sector counts
-Not sure how to check how full OS partition is. I have ssh enabled and use that regularly - StephenBGuru - Experienced Usercd //
df .
will tell you the total number of 1K blocks in the OS partition, the number used, the number free, and the % used. - swamp2Tutor^Thanks
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/md0 4184756 813776 3161320 21% / - fifer55Apprentice
swamp2 wrote: ^Thanks
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/md0 4184756 813776 3161320 21% /
Looks like you are missing some stuff. Here is what mine looks like and I am running just OSX in my environment with no issues, even though I am at almost 90% utilization :(
ProBiz-NAS:~# cd //
ProBiz-NAS://# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/md0 4184756 1084048 2891048 28% /
tmpfs 16 0 16 0% /USB
/dev/c/c 7758880904 6843629316 915251588 89% /c
/c/_FTP 7758880904 6843629316 915251588 89% /home/ftp/_FTP
ProBiz-NAS://# - swamp2Tutor^
df returns more information than df .
Maybe ignorance on my behalf but I'm not too concerned about 21% vs. 28% used. - StephenBGuru - Experienced User
Yes. I specified "df ." because we were only interested in the OS partition. 21% used is great, it rules out a full OS partition as the case of the slowdown.swamp2 wrote: df returns more information than df .
Though a full data volume (e.g., C) can slow down performance. You can check that utilization with frontview, it is on the home page and also the volume settings page. - swamp2Tutor^ 70% of total disk space used. Also, please recall this decrease in performance seemed to happen somewhat suddenly.
- StephenBGuru - Experienced User
Understood. I wouldn't expect to see a noticeable slowdown at 70% anyway - usually it starts to kick in around 80% or more.swamp2 wrote: ^ 70% of total disk space used. Also, please recall this decrease in performance seemed to happen somewhat suddenly.
Though if there are a some of large files you can temporarily copy off, you can rule out that possibility also. - swamp2Tutor^ Nope, none that would make and more than a fractional change in %.
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