Softraid on Mercury Dual
I bought a Mercury dual to run in RAID 1 mode. However, the manual states that it needs two identical drives (up to the firmware). That kind of defeats the purpose of RAID 1: with a drive failure in two years time I never will find an identical one to rebuild the array.
So I am considering setting the Dual to independent and use Softraid (XT) to create the RAID 1 array. Is this a viable and reliable solution? Will softraid be able to rebuild the array in the Mercury Dual using a different but similar size drive as a replacement?
And (on a 2012 MacMini on USB 3.0) does it result in a significant performance hit when I use Softraid instead of hardware RAID?
Yes you can do this. and SoftRAID does not care about what disk you have.
I don't think you will get much of a performance hit on a Mirror.