ReadyNAS 316 - Disc 5 impending failure warning - leading to question about WD white label drives

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amrob2 wrote:

 

The drives currently installed in the primary NAS are WD Red 12TB WD120EFAX drives that spin at 5400rpm.

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Actually they spin at 7200 (even though for some reason WDC had them advertise themselves as 5400 class).

• https://www.extremetech.com/extreme/317327-western-digital-changes-its-reported-drive-speeds-to-reflect-reality

But you can mix-and-match, as Sandshark says.