phoenix13023 Posted May 28, 2021 Share Posted May 28, 2021 I have always had a question: doesn't parity disk work once a month for parity check? Why is its temperature so high all the time? Unraid is basically the default setting, without any special operations. Quote Link to comment
ChatNoir Posted May 28, 2021 Share Posted May 28, 2021 The parity disk is active for any write operation on the Array. The monthly parity check just compare parity information to what is actually on data drives. If your drive is constantly at that temperature level, you have a serious cooling issue for that drive. I would not be comfortable with any drive reaching this kind of temperature even occasionally. Quote Link to comment
JorgeB Posted May 28, 2021 Share Posted May 28, 2021 38 minutes ago, phoenix13023 said: Why is its temperature so high all the time? Because it needs better cooling? Parity works every time there are writes to the array. Quote Link to comment
phoenix13023 Posted May 28, 2021 Author Share Posted May 28, 2021 1 hour ago, ChatNoir said: The parity disk is active for any write operation on the Array. The monthly parity check just compare parity information to what is actually on data drives. If your drive is constantly at that temperature level, you have a serious cooling issue for that drive. I would not be comfortable with any drive reaching this kind of temperature even occasionally. In my application, there are mainly two vm applications: Debian and openwrt. They may have data changes all the time. Is it possible to set the cache disk to make the parity disk workload less heavy? In addition, I used an external mobile hard disk as a parity disk. Are there any good suggestions for heat dissipation? Quote Link to comment
ChatNoir Posted May 28, 2021 Share Posted May 28, 2021 7 hours ago, phoenix13023 said: I used an external mobile hard disk as a parity disk. Are there any good suggestions for heat dissipation? External HDD are generally not designed for heavy writes and do not have great cooling, especially 2.5". For a regular drive I'd say ensure that there is airflow on the drive, but here ... As a side note, how is your drive connected ? eSATA, USB, other ? USB is not recommended for Array drive as the connection can be very unreliable. 7 hours ago, phoenix13023 said: They may have data changes all the time. Is it possible to set the cache disk to make the parity disk workload less heavy? Yes, I would suggest to add a cache pool and set the share with the heavy I/O to Prefer cache. Then go to Settings, stop the Docker and VM services. Back to Main, start the Mover. When it is done you can start your services again and you should be set. Quote Link to comment
phoenix13023 Posted May 29, 2021 Author Share Posted May 29, 2021 Thank you for your reply. The parity disk is a 3.5 inch wd external disk and connect by usb 3.0. The cach disk is add a month ago. I will try your tip. Quote Link to comment
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