Internal drive on Mac mini

studio60_ Said:

"Internal drive on Mac mini: I lost power during g a storm and now one of the drives on my Mac mini is not visible. I've gone to Apple, System Preferences, and Startup Disk and it does not show up. What can I do to recover it. I also did startup with Command, P, and R, but the drive doesn't appear."

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Mount the Drive while Booted in Recovery Mode:

Probably because you have yet to mount the drive. To mount the drive, boot up in Recovery Mode and then select Disk Utility. From there, mount the drive. If it is already mounted, then unmount it and then mount it. Also, click the First Aid button for each volume of the drive.

studio60_ Said:

"Internal drive on Mac mini: I followed your instructions, however the drive failed to appear. Do you have further instructions?"

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Troubleshooting Internal Drive on a Mac:

The SATA connector is likely disconnected on the drive and/or the LogicBoard. Or the drive may simply have failed.

So, Get this Mac Serviced...

Either (A/)Contact Apple, and set up a Genius Bar Appointment at your local Apple Store., or (B.)see an AASP (Apple Authorized Service Provider) in your local area.

A. Contact Apple:

• Contact Us - Choose Locations
• Proceed from there as Necessary
• NOTE: Due to the Coronavirus Pandemic, calls are taking a bit linger to get through. And, that makes sense, because many are at home working out-of-the-house or are taking classes over-the-web, this they have more time on their hands to contact Apple Support. So, it might take a bit to get through to Apple Support. But, just stay on the line, and someone will be with you.

Or...

B. Contact an AASP: 

1. Go Here: Find Locations - Apple Authorized Reseller
2. Click: Service & Support
3. Enter: your location information
4. See: if there is an AASP nearby
5. Contact: an AASP that shows up, and find out more about the services that they offer to fix the Mac

Sounds like the internal drive has failed.

At this point, you need to schedule an appointment at your local Apple Store or Authorized Apple Service Provider.

see > Apple Repair and Repair Status Check - Official Apple Support