Split Fusion drive on i-Mac running High Sierra was restored following Apple’s instructions .when attempting to reinstall the OS the fusion drive does not appear in the screen for destination disks.fusion is similarly not visible in Finder or Disk Utility.Both parts of the fusion drive appear with diskutil list.How do I make the Fusion drive re-appear?any suggestions
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FUSION DRIVE NOT VISIBLE
- Thread starter macoramma
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Did you format it after recreating the Fusion Drive from them? If not, you will need to format it as "Mac OS Extended (Journaled)" in Disk Utility before it will show up as a destination.
To format your Fusion Drive: Once you open Disk Utility, select the drive on the left side, then choose the erase icon from the toolbar, make sure "Mac OS Extended (Journaled)" is selected for the format, give it a name, then click erase. Once the process completes, you should be good to reinstall macOS.
Edit: Also, if the installer you're using is for macOS High Sierra, you may need to click the view icon in the toolbar, then check "Show All Devices" to see your unformatted drive.
To format your Fusion Drive: Once you open Disk Utility, select the drive on the left side, then choose the erase icon from the toolbar, make sure "Mac OS Extended (Journaled)" is selected for the format, give it a name, then click erase. Once the process completes, you should be good to reinstall macOS.
Edit: Also, if the installer you're using is for macOS High Sierra, you may need to click the view icon in the toolbar, then check "Show All Devices" to see your unformatted drive.
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Next time, could you please either copy/paste or take a screenshot? Kinda hurt reading that...
Anyways, this does look a bit strange. You have an LVG, and it is spread among your two drives, but it shows no virtual disk in diskutil list.
I would recommend trying the following things
1) Use the resizeStack command to try and see if your cs volume is just set to be 0 in size.
Syntax is as follows
11111111-2222-3333-4444-555555555555 3211g JHFS+ New 3211g
With 11111111-2222-3333-4444-555555555555 being replaced by your lvUUI
2) If that didn't work, try deleting the cs group and remaking it.
3) Output any error messages here
It's sounding like you will need to do a rebuild. I've had something similar to this happen and no matter what I did, they showed up split.