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Impact of mirroring drive?

Discussion in 'Windows 10' started by FijiJohn, Sep 19, 2018.

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  1. FijiJohn

    FijiJohn Thread Starter

    Apr 2, 2006
    I am working on a computer (which I originally built), after another guy "worked on it." The owner was having major power issues (nominal 240, but ranging from <100 to >500 volts) and apparently asked the other guy to "do something" for "data security/redundancy" until they get the power issue fixed. He took the 500GB Samsung M.2 (PCIe x4) C drive and "mirrored" it in diskmgmt to a 1TB Seagate Barracuda HDD. He claims it does not affect performance. Can that be true? How could the M.2 be mirrored to a slow HDD and not be slowed? (Admittedly, small writes would be handled by the cache and might not show much effect.)

    The other guy also decided to move the My Documents folder (with some big Outlook pst files) off the C drive and over to the HDD for reasons I do not understand.
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