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Forum Discussion
Duo Performance and lockout
Hi All,
I've been reading up a lot on performance issues that people are having but none seem to quite match mine. I apologise if I've writing about stuff already covered, but the performance troubleshooting page seems to be offline.
So, my setup:
I have a Duo with 2 1TB green caviar drives, running the latest firmware (4.1.13)
This is plugged directly into a netgear gigabit switch (new, problems were already there before)
Network has a squeezebox touch, a WD Live TV, 3 win 7 machines
1 win 7 machine is always on and has a share from the Duo mounted for online backup service livedrive
Duo is running squeezebox
Symptoms:
At apparently random times, playback on squeezebox just stops and it cannot even find the Duo. At the same time I cannot connect to the front end or SSH in or access any shares on the network. If I already have an SSH connection running and it hasn't been disconnected then it becomes extremely slow, but running top shows nothing particularly heavy going on.
Trying to copy files over windows shares is virtually impossible at all times.
Often when transferring large files via FTP, the connection simply closes.
Trying to run IOMeter when this is happening simply says that the share is not available.
Streaming movies over the WD works fine for a bit then suddenly buffering completely stops completely for a few minutes, then sometimes resumes for the remainder of the film.
Solutions tried:
This felt like a network IO problem, so I replaced the switch and cables, but no difference.
I moved the Duo and squeezbox onto the same switch to reduce latency and remove any other devices that might be the cause.
Do I need a new Duo?
Thanks for your help
Ben
I've been reading up a lot on performance issues that people are having but none seem to quite match mine. I apologise if I've writing about stuff already covered, but the performance troubleshooting page seems to be offline.
So, my setup:
I have a Duo with 2 1TB green caviar drives, running the latest firmware (4.1.13)
This is plugged directly into a netgear gigabit switch (new, problems were already there before)
Network has a squeezebox touch, a WD Live TV, 3 win 7 machines
1 win 7 machine is always on and has a share from the Duo mounted for online backup service livedrive
Duo is running squeezebox
Symptoms:
At apparently random times, playback on squeezebox just stops and it cannot even find the Duo. At the same time I cannot connect to the front end or SSH in or access any shares on the network. If I already have an SSH connection running and it hasn't been disconnected then it becomes extremely slow, but running top shows nothing particularly heavy going on.
Trying to copy files over windows shares is virtually impossible at all times.
Often when transferring large files via FTP, the connection simply closes.
Trying to run IOMeter when this is happening simply says that the share is not available.
Streaming movies over the WD works fine for a bit then suddenly buffering completely stops completely for a few minutes, then sometimes resumes for the remainder of the film.
Solutions tried:
This felt like a network IO problem, so I replaced the switch and cables, but no difference.
I moved the Duo and squeezbox onto the same switch to reduce latency and remove any other devices that might be the cause.
Do I need a new Duo?
Thanks for your help
Ben
29 Replies
Replies have been turned off for this discussion
- I'm not sure what your network topology is (or if you are streaming to the WD Live with dlna or CIFS/NFS). Just thinking that power-resetting the infrastructure might help. If the local traffic doesn't pass through the ethernet switch component of the R6300, then I agree that it is not likely to be the culprit.
- I didn't know WD Live *could* stream over CIFS, interesting, I should try that. I don't have an R6300 unfortunately :( I just have GS108 switch. Both the nas, the squeezebox and the WD are all plugged into that.
- Is it a GS108T per chance? Or the older un-managed GS108?
One issue with the GS108 is that it doesn't support ethernet flow control (802.3x). With the managed version (GS108T) you can enable flow control - which is needed for some media players (esp. if the NAS is running gigabit and the player is 100 mbit).
The WD Live can access your media with NFS, CIFS, or dlna. NFS is probably the best choice with a NAS. - just the GS108 :( Good tip with the WD I'll try that thanks.
I just tried direct connection with the nas and ran iometer and I only get 0.5MB Write and started 9.5MB Read down to 1.5! - Just to make sure I have the facts right:
(a) duo v1 running 4.1.13
(b) xraid (raid 1) disks on the HCL
(c) only squeezebox and transmission installed
(d) jumbo frames disabled, normal MTU of 1500
(e) normal redundant volume status reported in frontview.
(f) plenty of space on the OS partition
(g) no SMART errors reported
(h) modest TCP retransmissions reported
(i) intermittent very slow transfer speeds in both directions under many circumstances
1. direct connection or through GS108 switch
2. 1 gbit or 100 mbit configuration
3. with 3 different win7 machines and two media players
(j) turning off transmission does not help
(k) top does not show high CPU activity during slow network connection
(l) nothing seen in the logs
(m) a full backup has been created
Does this capture where we are?
BTW, did you purchase the duo around the time you joined the forum? If so (and if you are the original purchaser) then it is still under warranty. - (a) duo v1 running 4.1.13
Yes but not sure how to get if it's v1
(b) xraid (raid 1) disks on the HCL
xraid yes, not sure which version. WD green caviar disks. HCL?
(c) only squeezebox and transmission installed
and ssh and noled, although I've removed noled now.
(d) jumbo frames disabled, normal MTU of 1500
Yes
(e) normal redundant volume status reported in frontview.
Yes
(f) plenty of space on the OS partition
Yes
(g) no SMART errors reported
actually quite a few errors (see below)
(h) modest TCP retransmissions reported
high when using transmission, otherwise pretty low
(i) intermittent very slow transfer speeds in both directions under many circumstances
1. direct connection or through GS108 switch
yes
2. 1 gbit or 100 mbit configuration
yes
3. with 3 different win7 machines and two media players
also xbox360, a sky+ box, panasonic bluray but none connect to nas
(j) turning off transmission does not help
correct
(k) top does not show high CPU activity during slow network connection
correct although not sure my timing is quite right
(l) nothing seen in the logs
actually lots in the logs but hard to know what is important and what is just noise.
(m) a full backup has been created
Yes, and I agree, maybe a full reset is the next step :)
Smart errors:
Model: WDC WD10EADS-00P8B0
Serial: WD-WMAVU0337995
Firmware: 01.00A01
SMART Attribute
Raw Read Error Rate 0
Spin Up Time 5758
Start Stop Count 4894
Reallocated Sector Count 0
Seek Error Rate 0
Power On Hours 15160
Spin Retry Count 0
Calibration Retry Count 0
Power Cycle Count 164
Power-Off Retract Count 158
Load Cycle Count 325304
Temperature Celsius 33
Reallocated Event Count 0
Current Pending Sector 0
Offline Uncorrectable 0
UDMA CRC Error Count 0
Multi Zone Error Rate 0
ATA Error Count 0
Extended Attribute
Hot-add events 0
Hot-remove events 0
Lp stat events 13
Power glitches 0
Hard disk resets 0
Retries 0
Repaired sectors 0
Unforunately I bought the nas second hand on ebay summer 2012 :( - That's a very high load cycle count. WD Green disks are not recommended and if you must use them running WDIDLE3 is a good idea to adjust the timer to reduce the number of load cycles.
- Hi mdgm,
Yes, I've wdidled them now, and disabled altogether. Netgear do list them on their compatibility list though. Is there a way to reset these logs do you know? - No and you wouldn't want to. If you reset it you'd lose valuable information for helping to determine if a disk is failing.
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