Is it normal for initialization to occur when new?

You can use it no harm, it will just be slow.  I mean if you really want to, install connectors and let it start backups.  OTH, you may say GEEZ this slow and throw it out the window :angry:

Reguardless, you will “eventually” be as happy with this as you were WHS V.1  Good Raid and tons of space. (Better than DE)

Gramps