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How to use a SoftRAID startup volume with High Sierra

If you're using High Sierra, and booting up from a SoftRAID volume, you'll need to follow the steps given in this forum post, since the macOS High Sierra Installer does not recognize SoftRAID volumes as valid startup volumes.

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ThunderBay OWC SSD boot drive kernel panic
#1
I decided to reengineer my 4-SSD RAID 4 array into a 3-SSD RAID 4 array, using the free SSD as a boot drive. Using SoftRAID to certify and initialize, everything is fine, but when I try to then format it through Disk Utility, I get a kernel panic (on the live system as well as booted into local or Internet macOS Recovery).

Am I missing something or is this more of Apple's dysfunction? Currently my boot drive is a standalone external LaCie Thunderbolt 2 drive and that's been fine.

-dp
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#2
My guess is the disk is in SoftRAID format and you are using Disk Utility to erase it.

This is a Disk Utility bug.

Zero disk in SoftRAID to wipe the partition map. then Disk Utility can erase it.
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#3
(01-15-2019, 02:37 PM)SoftRAID Support Wrote: My guess is the disk is in SoftRAID format and you are using Disk Utility to erase it.

This is a Disk Utility bug.

Zero disk in SoftRAID to wipe the partition map. then Disk Utility can erase it.

That was exactly it. Thanks for the clue!
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