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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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Thunderbolt Vs USB RAID Enclosures - Reliabilty
#1
Hi there.

I'm wondering if there is a general preference between USB and Thunderbolt enclosures?

I'm using both at the moment - StarTech and Lacie TB enclosures and various US ones (Icy BOX, Sharkoon) etc.

I seem to always get errors / disk ejections/errors/ disk spinning up and down on the USB enclosures. Also, SMART seems very hit and miss on USB

Will be likely buying some new 8 or 12 bay raid enclosures soon ( looking at Mlogic MSpeed) - obviously TB enclosures are usually quite a bit more expensive.

Is there any info as to if & why USB is less reliable for external softraid volumes etc?

Thanks in advance.

Declan
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#2
Thunderbolt is both faster and more reliable than USB. In Mac OS in particular, there are USB issues that allow corrupted memory to be written to the protected area of a disk, damaging the volume.

USB is much slower with any RAID especially RAID 5 (40-50% slower).

I would not consider USB for anything but casual backups, not for serious data storage.
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#3
Thanks, I had been feeling the same way but good to get an expert view on this.

Declan
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