Can't add more than 5 HDDs in my storage array

[Uptown]

I want to expand my storage array and add another parity drive. Every time I try to add another drive, it disappear from available devices. I have to restart the machine to get them back or move another drive around in the storage array. Any advice or suggestions? I'm new to Linux and Unraid so bear with me.

unraidserver-diagnostics-20210812-0848.zip

Edited August 12, 2021 by Uptown
Added diagnostic files

[SimonF]

1 hour ago, Uptown said:

I want to expand my storage array and add another parity drive. Every time I try to add another drive, it disappear from available devices. I have to restart the machine to get them back or move another drive around in the storage array. Any advice or suggestions? I'm new to Linux and Unraid so bear with me.

Which license do you have basic supports 6 devices. This includes unassigned devices.

[JorgeB]

Please post the diagnostics: Tools-> Diagnostics after trying to add the new device. 

[Uptown]

I have a Pro license. Just attached the diagnostic file to the original post.

[JorgeB]

Formatted with type 2 protection

https://forums.unraid.net/topic/110835-help-with-a-sas-drive/

[Uptown]

You guys were a great help. The advice paid off. Thank you all.