Frank1940

First tell us what version of Unraid you are running? You should also provide information on what plugins, Dockers and VM's you have installed. One thing I would suggest to install a monitor and keyboard (temporarily) on the server. Then, when you reboot, select the 'Safe Boot' option from the Boot Menu. The rebuilt will start again. Let it run to see if it will finish the rebuilt. It appears that you have another problem but let's see if the rebuilt can be finished so that we have only one problem to deal with.

I did a very quick read through of this thread. I want to caution you about these detachable power cables that many vendors are now providing with their power supplies. They are not interchangeable between vendors for sure. (One fellow zapped several hard drives when he did so!) I would even be careful on mixing cables from the same vendor. (Different product lines could be sourced from different suppliers.) Buzz testing is the surest way to make sure that the right voltages end up on the correct pins on the hard drive connector end!

I would be suspicious of the Power Supply. There have been several hardware problems lately which appear to have been fixed when the PS was replaced. (PS are a much more complicated device now then they were back in the early 2000's and, perhaps, there has been some manufacturing cost cutting going on...)

@Shad0wWulf, how much memory do you have in your server?

Click on the circled Question Mark in the screen capture above. The underline of the question mark means that the "Help" system is turned on.

@oOSGearOo, what happens when you pointed to 'Mirror syslog to flash:' (A question mark-- ? --should appear as the mouse cursor hovers over the phase) and left click with your mouse. (That should remove and re-display the blue text box with each mouse click.)

First, make a complete copy (A backup, in other words) of your flash drive. Now run a chkdsk on the flash drive. If that does not find an error, remove the following from the flash drive: config/plugins/NerdPack.plg config/plugins/NerdPack (The first is a file and the second is a directory/folder.)

Do you see the yellow banner with the text, "Network Discovery is turned off..." inside. Click on it and change it! If that does not work, go through this thread as Win10 is NOT a single animal and folks have found a number of solutions to this problem that work. Most of the Win10 stuff is on pages 2 and 3. https://forums.unraid.net/topic/53172-windows-issues-with-unraid/

First thing you have to be able to do is to be able to shutdown the UPS power-conversion circuitry until the AC Power is restored. (Only a few UPS will do this...) Then you have to see if your BIOS supports restart-on-power-application. (Again, only a few MB's do this...) There is also another problem! You have to make sure that you shutdown the UPS with enough battery reserve to do a second shutdown. This prevents the problem of short restoration of AC power with a second loss of power in up to the next eight hours or so. (that is the time it takes to recharge the battery. ) The first couple of hours are probably the most crucial in this respect depending on how long you attempt to run on battery.

Print out this section on paper: Now write the name of each folder (not any file names, as the split level strictly deals with folders/directories) on the paper. There is not such thing as a 'sub-dir"! It is either a folder or a file. I do believe at this point, you need a split level of at least three. (By the way, I doubt if you truly need any split level if you are using .mkv files for media storage. Each show or movie is in one (and only one) file and that means that there will be no pause in the playing of any movie or show while a second disk spins up. You may have a slight delay while loading file names but that is usually only a few seconds.)

Here is that section (Found it with Google): https://wiki.unraid.net/Un-Official_UnRAID_Manual#Split_level

I think you need to set your split level higher. This quote is from the following section in the Unraid 6 manual found here: https://wiki.unraid.net/index.php/UnRAID_Manual_6#Parameters I realize that it is virtually 'legalese' and very difficult to understand. (At one time, there was a Wiki entry that had a much clear description of how the split level worked but I can't seem to be able to find it any more.) The split level assignment number has caused confusion for years. It is intended to keep the .VOB files in the VIDEO_TS directory of a DVD on the same hard disk so that the movie/show/video does not pause should the .VOB files be split across two disks.

If it happens again, try to capture a Diagnostics file ( Tools >>> Diagnostics ) before you reboot the server.

At the login prompt, login. the type diagnostics on the command line. That will write the Diagnostics file to the logs folder/directory on the flash drive. Upload the entire file with your next post.

trying Googling sync offline windows 10 It appears to be a "feature"...