July 22, 20205 yr New to unraid. I'm swapping out a data disk and I am getting between 15-20 MB/sec speed. ETA of over 3 to 4 days. Seems like that's not normal. Can someone help me figure out what is going on? unraid-diagnostics-20200722-1541.zip
July 22, 20205 yr i'm no expert on rebuild times, but both your parity drives are 5400 rpms that impact rebuild speed. Have you precleared the new drive? What speeds did you get while preclearing it? 3 or 4 days for a 6TB drive seems quite long to be parity: Model Family: WDC HGST Ultrastar He10 Device Model: WDC WD80EMAZ-00WJTA0 User Capacity: 8,001,563,222,016 bytes [8.00 TB] Rotation Rate: 5400 rpm Model Family: WDC HGST Ultrastar He10 Device Model: WDC WD80EMAZ-00WJTA0 User Capacity: 8,001,563,222,016 bytes [8.00 TB] Rotation Rate: 5400 rpm Edited July 22, 20205 yr by reftek
July 22, 20205 yr Author 40 minutes ago, reftek said: i'm no expert but on rebuild times, but both your parity drives are 5400 rpms that could be it. have you precleared the new drive? what speeds did you get while preclearing it? 3 or 4 days seems quite long to be honest All disks are 5400 RPM, but there's no way that is the reason for 15 MB/s. I recently added those parity drives and average speed were 150 MB/s. I did not preclear as I'm new and am not even sure that that is. The 6TB rebuilding disk came from a Freenas server. Disk was wipe by Freenas before pulling and moving it to unraid.
July 23, 20205 yr Community Expert 2 hours ago, 3vang said: I did not preclear as I'm new and am not even sure that that is. Preclear is only for testing new disks or disks you think may have some problems. Unraid doesn't even need a clear disk for a rebuild. Nothing obvious in your syslog. Are you seeing anything in the Errors column on Main? Are you trying to read/write lots of data during rebuild? That would slow things down. How are your disks connected? Are any disks showing SMART warnings on the Dashboard?
July 23, 20205 yr Author On 7/22/2020 at 8:39 PM, trurl said: Preclear is only for testing new disks or disks you think may have some problems. Unraid doesn't even need a clear disk for a rebuild. Nothing obvious in your syslog. Are you seeing anything in the Errors column on Main? Are you trying to read/write lots of data during rebuild? That would slow things down. How are your disks connected? Are any disks showing SMART warnings on the Dashboard? No errors on Main. No VMs, Docker or IO activity at all. All disks are onboard SATA on a Supermicro X10SDV-TLN4F board, with 2 NVMe as cache. No SMART warnings. Edited September 4, 20205 yr by 3vang
July 23, 20205 yr 3 minutes ago, 3vang said: No errors on Main. No VMs, Docker or IO activity at all. All disks are onboard SATA on a Supermicro X10SDV-TLN4F board, with 2 NVMe as cache. No SMART warnings. There is a warning on Disk 1. Not green. What is that? Can you dig in?
July 23, 20205 yr Author Just now, johnwhicker said: There is a warning on Disk 1. Not green. What is that? Can you dig in? "Device Contents Emulated Click to spin down device" That is the disk being rebuild. I am assuming that is normal status for the replaced disk that is currently rebuilding.
July 23, 20205 yr 23 minutes ago, 3vang said: "Device Contents Emulated Click to spin down device" That is the disk being rebuild. I am assuming that is normal status for the replaced disk that is currently rebuilding. Yes if is being rebuild yes that correct.
July 23, 20205 yr Community Expert WD60EZAZ it's SMR, and while they generally perform OK with Unraid when writting sequentially you might be hitting the SMR wall, if the rebuild starts fast and it slows down after a few minutes it's likely that.
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