D5-300 won't mount on Mac

[mrschroeder]

My D5-300 has mounted on my Mac but won't stay mounted and now refuses to mount using apple's disk utility app. Running Catalina 10.15.7 on intel Mac mini.

I keep getting this error when trying to mount - Could not mount “Raid5”. (com.apple.DiskManagement.disenter error 49153.)

I have data on the drive and the lights are all green on the device and the disk utility app shows no error on running first-aid. It just won't mount.

Mike