June 28, 201115 yr This just started happening a couple of days ago I'll gracefully shutdown, when I turn the machine back on with a monitor plugged in I get no post, no ping, no telnet, nothing. I'll hold the power button (I know, I know) to turn off the machine, restart and again nothing. The only thing I hear is the HD's spin up (and not every time) I'll unplug the power cable from the PSU, plug it back in, boot and bam everything is back to normal no problems. Sometimes I need to unplug it a few times for the computer to boot properly. Any idea on what troubleshooting I can do to find out the root issue? I'm guessing motherboard or PSU. ABIT AB9 Pro Motherboard CORSAIR Enthusiast Series CMPSU-550VX 550W powering 5 7200rpm drives. Thanks.
June 28, 201115 yr This just started happening a couple of days ago I'll gracefully shutdown, when I turn the machine back on with a monitor plugged in I get no post, no ping, no telnet, nothing. I'll hold the power button (I know, I know) to turn off the machine, restart and again nothing. The only thing I hear is the HD's spin up (and not every time) I'll unplug the power cable from the PSU, plug it back in, boot and bam everything is back to normal no problems. Sometimes I need to unplug it a few times for the computer to boot properly. Any idea on what troubleshooting I can do to find out the root issue? I'm guessing motherboard or PSU. ABIT AB9 Pro Motherboard CORSAIR Enthusiast Series CMPSU-550VX 550W powering 5 7200rpm drives. Thanks. Could be capacitors on motherboard. Would be interesting to try the PSU with another system to see if any problems booting to remove the PSU from question. I have a TV, that when barely still under warranty had issues turning on. They replaced 2 capacitors and has been running great ever since. I've heard of capacitors on motherboards going bad and causing this type of sympton.
June 28, 201115 yr Author This just started happening a couple of days ago I'll gracefully shutdown, when I turn the machine back on with a monitor plugged in I get no post, no ping, no telnet, nothing. I'll hold the power button (I know, I know) to turn off the machine, restart and again nothing. The only thing I hear is the HD's spin up (and not every time) I'll unplug the power cable from the PSU, plug it back in, boot and bam everything is back to normal no problems. Sometimes I need to unplug it a few times for the computer to boot properly. Any idea on what troubleshooting I can do to find out the root issue? I'm guessing motherboard or PSU. ABIT AB9 Pro Motherboard CORSAIR Enthusiast Series CMPSU-550VX 550W powering 5 7200rpm drives. Thanks. Could be capacitors on motherboard. Would be interesting to try the PSU with another system to see if any problems booting to remove the PSU from question. I have a TV, that when barely still under warranty had issues turning on. They replaced 2 capacitors and has been running great ever since. I've heard of capacitors on motherboards going bad and causing this type of sympton. I can throw the PSU into another machine and see if that's the issue but I'm worried it will boot like normal as I don't have another computer with 5 HD's. I started a parity check when I posted this (fresh from a 4.6 to 4.7 upgrade) and speeds are slow 16,717 KB/sec Estimated finish: 1867.0 minutes. I heard the hard drives spin up again in the middle of the check (they were already all spun up as I just booted it), I'm starting to wonder if it's a PSU issue..... Edit: getting a bit confused, stopped the parity check and restarted it now it's going at 103,028 KB/sec, and now that I think about it the speeds slowed down when I heard the hard drives spin up again. Weird. Any ideas? Edit 2: Sounds like my HD's keep spinning up or down? And the speed dropped right back down to 16,000 KB/sec. I shut off the machine in the meantime.
June 28, 201115 yr I have had slow parity check when there are errors. I have understood that the unraid tries to read the disks multible times before reporting errors.
June 28, 201115 yr Author I have had slow parity check when there are errors. I have understood that the unraid tries to read the disks multible times before reporting errors. Ahh, so I could be running into two seperate issues here. I'm going to do some troubleshooting on the no post issue then crack down on the parity issue. Here are the troubleshooting steps that I plan on taking: 1. Try the PSU in my unraid box without any HD's plugged in 2. Try the unraid PSU in another machine 3. Try another PSU in the unraid machine 4. Maybe run Memtest to be safe I will post back with results tonight when I have time to try this out.
June 28, 201115 yr It could also be your flash drive. I had a flash drive once that would lock up a system. Even if you shutdown or power-cycled using the power button, it would come back to a black screen with a blinking cursor and never do anything. But if you turned it off at the switch on the PSU, it would start back and work correctly (for awhile) every time. Basically, the flash drive was locked in some state where it was trying to do IO operations. Rebooting or restarting did nothing, as power is never removed from the USB ports, so the flash drive continues to remain locked. Only removing power from the flash drive kills the process it is stuck on. Flipping the PSU to off does this. So it could be a bad PSU, bad MB, or even a bad flash drive.
June 29, 201115 yr Author Just wanted to post a quick update: I took out all of my hard drives and powered on the server, to my surpriase it posted just fine. I shut it off and repeated 10-15 times, even power cycling (unplugging cable from PSU). Every single time it would post with no issues. Put all of my hard drives back, and again it posted right away! I'm going to do some more testing when I get home today, I'm currently upgrading a disk that seems faulty. Also I think I may have higher than normal parity speeds expectation. Is there a list of times it takes to run parity checks? I have around 4TB of space and it took around 8 hours, avregaing at around 45-55 MB/s.
June 29, 201115 yr Just wanted to post a quick update: Also I think I may have higher than normal parity speeds expectation. Is there a list of times it takes to run parity checks? I have around 4TB of space and it took around 8 hours, avregaing at around 45-55 MB/s. Yes, it is in the wiki. http://lime-technology.com/wiki/index.php?title=User_Benchmarks Your speeds are slower than some, but faster than others. My older unRAID server averages 16MB/s, my newer one with mostly 7200 RPM drives about 65MB/s. Time is mostly related to bus bandwidth reading all the drives in parallel. If you have three drives you are reading 6TB of data. Most drives can be read at somewhere between 100MB/s and 45 MB/s. (faster on outer cylinders, slower on inner ones) It takes 12 seconds to read 1GB at the 50MB/ rate you are reporting.
July 15, 201114 yr Author Quick update, swapped the HD and got a new cage (Norco), and the issue is gone! I'm guessing it was the hard drive though Thanks!
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