Raid5 Will not mount inside Finder on my Mac Studio

Question

Level 1

19 points

Raid5 Will not mount inside Finder on my Mac Studio

I just upgraded to a new Mac Studio from a 2015 iMac and my Raid5 will not mount inside Finder. In Disk Utility I can see the separate drives so I know the connection is good. The "Mount" option is greyed out. I ran First Aid on each drive and all were good. I tried switching cables and that didn't change anything. This is a Thunderbolt 2 connection drive bay so I am using a TB2 to 3 adapter for the MacStudio. But again, Disk Utility sees the drives so I don't think it's a connection issue.

Any ideas?

Posted on Oct 1, 2022 06:14 AM

Reply

Answer 1

etresoft

Level 9

55,280 points

Oct 1, 2022 06:45 AM in response to Bobby Marko

How did you create this RAID on the iMac? It sounds like you are missing some kernel extension or something.

Make sure you have a backup of that data. If you try to re-assemble the RAID, you might lose it.

Reply

Answer 2

Bobby Marko Author

Level 1

19 points

Oct 1, 2022 07:38 AM in response to etresoft

It’s created by the hardware of the enclosure. A raid5 is set up so that if a drive fails there is a backup drive for that data. But this is an OS issue, not a problem with the array. Otherwise disk utility and terminal wouldn’t see the drives.

Reply

Answer 3

etresoft

Level 9

55,280 points

Oct 1, 2022 09:53 AM in response to Bobby Marko

Yes. I understand how a RAID works. It sounds like your old computer had some kind of kernel extension or other system modification that allowed it to see the drives as a single device. If that isn't true and the hardware should be doing this entirely on its own, then either the hardware has failed or is incompatible with the new computer and/or operating system.

Currently, the hardware is passing all devices to the computer. Either it has failed somehow or it is expecting your computer to be the one to assemble the devices into a single volume.

You have only mentioned your Apple hardware and your Thunderbolt connections. You haven't said anything about the RAID device itself or any software configurations that were setup on the old computer. That missing information is the only relevant information.

Reply

Answer 4

Bobby Marko Author

Level 1

19 points

Oct 1, 2022 12:13 PM in response to etresoft

It's an OWC Thunderbay. It's been a while but I don't believe I used any software to setup the raid. The enclosure is setup for a Raid5. They do ship their enclosures with Softraid but I've never installed it because it's optional. I'll contact them to see if I can get a copy of the software. Thanks!

Reply