March 20, 201412 yr Author I have 4 computers, a smart tv, a ps3 and a media streamer. None of them have any issues if unRaid is out of the equation - everything is hardwired though a gigabit router and a gigabit switch. I only use wireless for the phones and tablets. Additionally, I use a separate workstation (solid state drives only) to download torrents directly onto my unRaid machine (using uTorrent 2.2.1) and I frequently get a "DISK OVERLOAD 100%" error in uTorrent (Yes I get poor performance even when torrents are not running). This also indicates a write performance issue with unRaid (I can get a constant 3MB/sec download speed yet writing to disk can't seem to keep up) APPEAL for HELP. I'm stuck for ideas. The syslog looks fine to me. No plugins. No errors. Network sounds simple...what could be causing network dropouts like this? Smitty2k1: are you sure your utorrents are writing to a user share which is configured to use your cache drive? Actually I intentionally don't use cache for the torrent share because I have a small SSD cache drive (64GB) and if I'm downloading a torrent I'm not too concerned about performance. That said, I had these problems before I ever started downloading directly to unRaid and before I ever even had a cache drive Maybe a new MoBo+CPU is the way to go. I really like my current supermicro atom w/ IPMI, but supposedly the new generation is extremely nice (and expensive)
March 23, 201412 yr Are you using simple features or dynamix? I noticed slow parity calculation and a lot slower writes speeds when I had dynamix.
March 23, 201412 yr Are you using simple features or dynamix? I noticed slow parity calculation and a lot slower writes speeds when I had dynamix. That would happen if you have the webGUI open...leaving the window running requires a lot of I/O to constantly read the disk state and write to the GUI. You can change the update time in the Dynamix options.
August 6, 201411 yr Author All - my problems continue. This performance is so sad even though the computer never sleeps, I have to wait for minutes for disks to spin up whenever I sit down to browse my media. Finish a video? Yup another few minutes wait. If this happens while I'm streaming music, the music also freezes. SSD cache disk? Yes still only writes around 15MB/sec. Is there any way to reinstall unRaid (without losing my data) to see if that helps? Otherwise where do you suggest I start, replacing my motherboard/CPU (integrated)?
August 7, 201411 yr Show the outputs of "ifconfig" and "ethtool eth0". Attach SMART reports and a new syslog.
August 11, 201411 yr Author Show the outputs of "ifconfig" and "ethtool eth0". Attach SMART reports and a new syslog. Attached 1 smart_d1.txt smart_d2.txt smart_d3.txt smart_d4.txt
August 11, 201411 yr Author Show the outputs of "ifconfig" and "ethtool eth0". Attach SMART reports and a new syslog. Attached 2 smart_d5.txt smart_ssd_cache.txt smart_parity.txt
August 11, 201411 yr Author Show the outputs of "ifconfig" and "ethtool eth0". Attach SMART reports and a new syslog. Attached 3
August 11, 201411 yr Author Show the outputs of "ifconfig" and "ethtool eth0". Attach SMART reports and a new syslog. Attached 4 syslog.txt
August 11, 201411 yr One thing I haven't seen in this thread is trying a different switch port and/or different Ethernet cables. A defective pair in an Ethernet cable, or a bad switch port, could result in one direction of the transfers being limited to 100Mb speed ... which would explain MOST of the transfer speeds you've listed -- although your last quote belies this theory a bit ["... still only writes around 15MB/sec."]. I'd try that before re-building the system. But in answer to your question r.e. rebuilding everything -- Yes, you could move this all to a new system and simply boot to the USB flash drive and it would work fine. Another thing you could do that might be a bit simpler is to create a new flash drive with the latest v5.0.5 version (just the basic, free version); boot to it; assign a couple spare hard drives to it (one data, one parity); and then see how it performs ... you could try this on both your current system and on any other system you're thinking of using.
August 20, 201411 yr Author One thing I haven't seen in this thread is trying a different switch port and/or different Ethernet cables. A defective pair in an Ethernet cable, or a bad switch port, could result in one direction of the transfers being limited to 100Mb speed ... which would explain MOST of the transfer speeds you've listed -- although your last quote belies this theory a bit ["... still only writes around 15MB/sec."]. I'd try that before re-building the system. But in answer to your question r.e. rebuilding everything -- Yes, you could move this all to a new system and simply boot to the USB flash drive and it would work fine. Another thing you could do that might be a bit simpler is to create a new flash drive with the latest v5.0.5 version (just the basic, free version); boot to it; assign a couple spare hard drives to it (one data, one parity); and then see how it performs ... you could try this on both your current system and on any other system you're thinking of using. I did try a different cable, switch port, and switch. Sadly no luck. I think I have two spare HDDs and USB drive laying around, I like the suggestion of trying the same hardware on a blank unRaid instal.
August 20, 201411 yr As I implied earlier, trying a new Basic install of UnRAID will isolate whether there are some hardware issues that are resulting in the performance problems; or some configuration issue of your UnRAID system. If a new, Basic install works well, then clearly it's not a hardware problem. The process of then identifying which add-on/plug-in, or some other configuration change, is causing the write issue can, of course, be fairly laborious, as you'll need to make one change at-a-time -- then boot and test -- and continue to repeat that process until you isolate the cause.
August 20, 201411 yr Author As I implied earlier, trying a new Basic install of UnRAID will isolate whether there are some hardware issues that are resulting in the performance problems; or some configuration issue of your UnRAID system. If a new, Basic install works well, then clearly it's not a hardware problem. The process of then identifying which add-on/plug-in, or some other configuration change, is causing the write issue can, of course, be fairly laborious, as you'll need to make one change at-a-time -- then boot and test -- and continue to repeat that process until you isolate the cause. Right! As far as I know I do have a stock unraid instal and so go file. The only difference in hardware would be the HDDs themselves. But I will try it one of these days (about to move homes so that will probably delay it)
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