[Time Machine] [Fusion Drive] "There was an error preparing time machine"

Hi everyone, I'm using Imac 2017, it comes with a 1 TB fusion driver (the OS was installed in the external SSD). I was using it as time machine drive before updating to big sur.

But recently I re-installed my mac to a new external SSD and I formatted the fusion drive to Mac Os Extended (Journaled)/GUID. I got this error when I'm trying to select the fusion drive as backup disk. Please help, thanks!

iMac Line (2012 and Later)

Posted on Aug 8, 2021 10:48 AM

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3 replies

Barney-15E

Level 10

122,048 points

Aug 8, 2021 2:48 PM in response to JerrrickCai

I would imagine Time Machine wouldn’t like a fusion drive as a destination.

As to the formatting, Time Machine will convert it to APFS. That is likely where it is failing.

I would split the fusion drive and use the spinning hard drive as the TM destination.

JerrrickCai Author

Level 1

8 points

Aug 9, 2021 9:52 AM in response to Barney-15E

thanks I formatted the whole fusion driver to APFS and it works!

JerrrickCai Author

Level 1

8 points

Aug 9, 2021 9:25 AM in response to Barney-15E

it makes sense, thanks!

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[Time Machine] [Fusion Drive] "There was an error preparing time machine"