New Disc Unmounting - Next steps?

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I did the standard preclear, format, mount, & added it to the array.

That's not the normal process of adding a new disk to the array. The order of the steps is wrong. You really need to post your diagnostics.

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did the standard preclear, format, mount, & added it to the array

There is nothing "standard" about that sequence.

 

1. Preclear is fine if you want to test the disk. Otherwise you can just add it to the array and let Unraid clear it.
2. Format must be done AFTER adding a disk to the array.
3. Don't know what exactly you mean by "mount". I suspect you are using the word incorrectly.
4. As mentioned, adding the disk to the array must happen before formatting.

 

Will probably copy the thread to General Support after examining the diagnostics syslog since this is likely user error instead of a bug.

 

Since you rebooted before getting that syslog nothing to see except the fact that disk13 isn't mounting, probably because it hasn't been formatted.

 

6 minutes ago, trurl said:

Preclear is fine if you want to test the disk. Otherwise you can just add it to the array and let Unraid clear it.

A disk must be clear when adding it to a NEW slot in an array that already has valid parity. This is so parity will remain valid. A clear disk is all zeros and so has no effect on parity.

 

8 minutes ago, trurl said:

Format must be done AFTER adding a disk to the array.

If you format a precleared disk before adding it to the array, it is no longer clear. Format writes an empty filesystem to the disk. So, it is no longer all zeros, and Unraid will have to clear it again.

 

You didn't specifically mention Unraid clearing the disk again after you added it. Perhaps you didn't notice, or perhaps you did something you haven't told us about.

 

 

 

I am closing have closed this report. I have copied the thread to General Support. Please continue discussion here:

 

Changed Status to Closed

Changed Priority to Other