SiNtEnEl Posted January 28, 2018 Share Posted January 28, 2018 (edited) Hi Guys, I have been running a parity checks on my unraid server, and had mixed results on the speeds lately. (My thoughts where interference of other processes) Due to a Disk RMA, i had to remove a disk and offload all data off it, rebooted and wanted to do a parity check afterwards. (Did not die, smart alarms) So to speed things up i stopped all my dockers (did not stop the service, forgot) and VM's (disabled the VM manager as well). Again i see the gradually slow down of the parity check, and a dip but that was me accessing a share. Other checks in the past avg around 220MB, so i quite wonder if there is a possible explanation for this. Disk temps are pretty stable around 30 / 32 celsius, so heating is not a issue in my opinion. Had some vibration issues (bad case) in the past that made the G-Sense sensor trip in the past, wonder if it degraded the drives. The drives passed seagate seatools test that i had to run for the RMA, but still i'm not feeling to happy about these speed drops. Also had a bad cable in the beginning (preclear), resulting in smart cmd timeout and crc errors but that is fixed for a while now. Anyone has a idea? Edited January 29, 2018 by SiNtEnEl Quote Link to comment
JorgeB Posted January 28, 2018 Share Posted January 28, 2018 Just now, SiNtEnEl said: i quite wonder if there is a possible explanation for this. That's perfectly normal and how disks work, they are much faster on the outer cylinders and gradually slow down as it goes to the inner cylinders. Quote Link to comment
SiNtEnEl Posted January 28, 2018 Author Share Posted January 28, 2018 2 minutes ago, johnnie.black said: That's perfectly normal and how disks work, they are much faster on the outer cylinders and gradually slow down as it goes to the inner cylinders. Agree on that, and use to see a speed drop of around 30 / 40 MB in the end (200MB range), but now i'm well over 100MB down in speed (90MB) hens what got me worried. Only thing that changed is that i lost a disk compared to the old setup, 2 vs 3 maybe that is a large factor. Quote Link to comment
JorgeB Posted January 28, 2018 Share Posted January 28, 2018 Ending speed is usually about half the starting speed, this is a graph for a single disk: 1 Quote Link to comment
SiNtEnEl Posted January 29, 2018 Author Share Posted January 29, 2018 (edited) @johnnie.blackI will mark it solved. Will test more when my drive gets back from RMA. Thank you for taking your time and responding. Edited January 29, 2018 by SiNtEnEl Quote Link to comment
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