July 28, 20205 yr I have an unraid box which will randomly slow to a crawl (SMB transfers time out, webgui mostly unresponsive, dockers unreachable/time out, can't even start HTOP till system returns), top reports high load averages but low CPU usage during these times Hardware Intel i7-6700 12 GB DDR4 4x1tb internal drives (2 toshiba, 2 WD) 1x 1.5tb seagate expansion 2.5 as a parity (connected via USB 3.0) 1x onboard nic 1x TP link gigabit PCIe NIC HP x705w USB (boot) Recent Hardware changes Changed from Ryzen 3 - 1200 to intel i7-6700 added an external drive to use as parity drive and use parity drive as data drive added second NIC (TP-Link gigabit) removed graphics card I have tried turning on write caching for the parity drive, it has not made much of a difference (yet, I only did this 10 minutes ago at time of writing) Reddit thread docker ps, no VMs DMESG Thanks Edited July 28, 20205 yr by danielandastro
July 28, 20205 yr Community Expert 22 minutes ago, danielandastro said: added an external drive to use as parity drive Do you mean your parity drive is connected by USB?
July 28, 20205 yr Author 3 minutes ago, trurl said: Do you mean your parity drive is connected by USB? Yes, USB3, worth noting that the slowdown followed this change but not immediately, it was a few days after I did it. Edited July 28, 20205 yr by danielandastro
July 28, 20205 yr Community Expert USB connections are not reliable enough for disks in the parity array or cache pool. The only way I would even consider USB in the array is for a backup server with no parity disk assigned. Probably only a matter of time before parity gets disabled.
July 28, 20205 yr Author 7 minutes ago, trurl said: USB connections are not reliable enough for disks in the parity array If this is the reason then I am completely screwed, I don't have any more SATA ports, and since its a 1.5 TB I assume I have to replace it with the same size drive which rules out restoring the old config. Strange that it would show up now and not after adding the drive
July 28, 20205 yr Community Expert 1 hour ago, danielandastro said: since its a 1.5 TB I assume I have to replace it with the same size drive Since it's parity and new config will rebuild parity anyway, it only has to be as large as the largest single data disk.
July 28, 20205 yr Author 3 minutes ago, trurl said: new config will rebuild parity I've ordered a Syba PCIe 1x sata card, will it work if I just shuck the drive and use the HBA or do I have to rebuild parity Is there any way of confirming that the problem was infact the USB Edited July 28, 20205 yr by danielandastro
July 29, 20205 yr Community Expert 43 minutes ago, danielandastro said: will it work if I just shuck the drive Maybe but you should check parity in that case to make sure. 46 minutes ago, danielandastro said: Is there any way of confirming that the problem was infact the USB Maybe something would show up in diagnostics. In any case USB parity disk is just a problem waiting to happen in my opinion whether it is the cause or not.
July 29, 20205 yr Author 9 hours ago, trurl said: Maybe something would show up in diagnostics. Nothing showed up in syslog, but the card is supposed to arrive today, hopefully that will sort it
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