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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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OWC 5.7.2 driver anomaly?
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Every major OS release we get s few cases like this. Our theory is that the OS upgrades various things on all the volumes, then shuts down before all I/O's can be completed on all the disks.

this can cause minor volume directory damage. It keeps Disk Warrior in business, as HFS volumes then either cannot mount, or mount "read only".

the repair in Disk Utility generally is not useful, only Disk Warrior, or as you did, restore from backup.

We had added a subtle feature in 5.6.7 to attempt to reduce these incidents, but it is not a real solution. But we started seeing this with SSD startup volumes increase in frequency, which led to our theory.

We expect that APFS volumes will prevent this, as directories have a more robust structure. SoftRAID will support APFS next year, we expect in the spring.
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OWC 5.7.2 driver anomaly? - by KMarc83 - 12-13-2018, 10:43 PM
RE: OWC 5.7.2 driver anomaly? - by SoftRAID Support - 12-14-2018, 03:00 AM

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