So this is a first. 

 

I got my first WD Red 4TB in and started the pre-clear process. So far, I have had to reboot my new testbed (of old parts) twice as it seems to have locked. The total elapsed time, etc. doesn't move. I started the process Friday night and it's still going, apparently hung again. The rest of unraid seems to be responsive. I have attached diagnostics as I run off to work. 

tower-diagnostics-20180103-0430.zip

If you're using the preclear plugin suggest you use the preclear script instead, currently many users have issues with it, mostly with larger drives.

Oh interesting. I hadn't heard that. Yes, I'm using the plugin. Well I am hoping it's a software issue and not hardware. 

 

It's still going, on the 3rd cycle, but says it's averaging 64MB/s which seems really slow. 

Well after 3+ days it says the preclear finished. I have another drive showing up tomorrow... I'll use the script. Should I trust this preclear done via the plugin? The write speeds were horrendous, but I don't have a point of comparison, not having owned reds before. 

So... I tried using the script yesterday, ran into the "device is busy", which directed me to threads saying as of 6.2, the script isn't useful; use the plugin. Sigh. I wish I still had a copy of 6.1.9 kicking around for a testbed. Started the preclear with the most recent arrival and it got 6 hours in - stuck. Time for another reboot... 18 hours later when I noticed it. So much wasted time!

5 hours ago, TyantA said:

So... I tried using the script yesterday, ran into the "device is busy", which directed me to threads saying as of 6.2, the script isn't useful

https://forums.lime-technology.com/topic/12391-re-preclear_disksh-a-new-utility-to-burn-in-and-pre-clear-disks-for-quick-add/?do=findComment&comment=460592