Hello All, I Replace a failing hard drive over the week-end. I did the pre-clear and all checked good. I allowed the drive to rebuild itself. However, on the main UnRaid page the Reads values are what the Writes values should be. Example: my Read value shows 33 and my Write value reads 3,623,851. The values for the other drives show visa-versa. The drive I installed was a WD Black 2TB. The other older drives are 2TB Samsung HD204UI. Any ideas for for to resolve this issue would be grateful.

tower-diagnostics-20200107-0127.zip

I do not understand what you think is wrong?     If you are rebuilding a drive then Unraid will be reading each sector from all the other drives to calculate what should be in that sector on the rebuilding drive and then writing the rebuilt sector to the drive being rebuilt.

Thank you, it just looked so strange that even after the drive is rebuilt my values did not look like the other drives. Since I have never replaced any of my drives before I'm a little cautious. If you look at the attachment first look can be deceiving.

That is exactly what I would expect to see after a rebuild   The rebuild process had to write to every sector on the drive being rebuilt so it is not surprising there are a lot of writes on that drive.

Thank you. So I take it when I replace the parity dive to a larger drive (6 TB), the same process will occur?

23 minutes ago, chungsters said:

Thank you. So I take it when I replace the parity dive to a larger drive (6 TB), the same process will occur?

Yes, but in that case it will be the parity drive that gets lots of writes and all the data drives that get lots of reads.

 

Great, that was not so bad after all. Thank you itimpi for your help.