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After a Catalina reinstall, I find I have two Macintosh HDs in the Finder (see attached image). The smaller one is 27.45GB. I'd like to merge it with the other HD. I can't do Time Machine backups until there is just one HD in Finder. Thanks
iMac 27″ 5K, macOS 10.15
Oh, you really did Split your Fusion drive.
Did you erase each device separately?
This will require erasing the drive, again: How to fix a split Fusion Drive - Apple Support
Oh, you really did Split your Fusion drive.
Did you erase each device separately?
This will require erasing the drive, again: How to fix a split Fusion Drive - Apple Support
You should be able to remove that volume, but Remove button doesn't seem to be available.
Where is the other one mounted? Maybe it was partitioned.
From the View button, select "Show All Devices" and post a shot of that.
I didn't intentionally split them. I was downgrading from Big Sur because a key bit of software wasn't compatible, when my screen froze in Recovery mode. So, with some help from Apple Support, I was able to reinstall Catalina from the Apple site and after doing that used Time Machine to recover my last backup. That's when I ended up with the two HDs.
I didn't intentionally split them.
Why? The HDD isn't fast enough to run Catalina or Big Sur on its own. I guess you could just use it as a data drive and boot off the SSD.
Both of them have an OS installed on them. Erase the one you don't want to use as the startup drive. Currently, you are using the HDD as the startup drive. If you wan't to boot from the SSD, you'll need to install Catalina on that.
As Barney said, this one should be removed.
You should be able to control-click it and choose Delete APFS Volume.
Hi Luis
These are my options. What do you suggest?
Open Disk Utility and post a screenshot of that.
It's all sorted. Thanks, Barney. I followed your How to Fix a Fusion Drive link. All is well.
Two Macintosh HDs in Finder
