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USB 3.0 HDD as parity drive


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I have a USB 3.0 drive 3TB sitting idle in my study and I was wondering if I could use it as a parity drive on my unraid server. 



1) is it possible?

2) if so, is there any downside to using a USB dr instread of SATA or PCIE?


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It will work, and if it's the only USB drive (as long as it's a UBS3 port) performance should be OK.


Error handling by USB on the other hand will probably not be as good as an internal drive, also make sure it's not easy to bump the cable and disconnect, etc.

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