Probably one of the worst options - if you create an exact copy of the disc, in the event that Ensemble failing, you would not be able to restore it to anything other than an Ensemble (or another device with compatible disc format to ensemble).

This is especially true with RAID devices where sometimes, even RAID firmware differences is enough to make a physical device become incompatible.

What you want is a copy of the disc contents (or a Sooloos backup although some people seem to have issues with this) stored on media with the most compatible disc format. That way, if you decide to change hardware or OS, you can still read the backup contents.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).