I just upgraded my MacBook Pro to El Capitan and I’m now thinking about going to 10.11 on my iMac Mid 2010 as well. Problem: I have two MyBook Studio II 2TB (in raid 1 configuration) connected to my iMac, one for Timemachine backups, the other one is my image archive (well, additionally there are two MyPassport drives attached as well …)
I remember that there was an issue with the WD Drive Manager when Mavericks was released (data loss), and it was fixed with a new release. I was looking for an updated version for the Drive Manager for versions 10.10+, however, Drive Manager disappeared completely from the downloads page. The Drive Utility shows only the MyPassport Studio drive as manageable device (and always reports, that there’s a raid problem on that small 3.5" drive …).
Anyway, I’m stuck. Before upgrading to El Capitan I somehow would like to know if I can use both MyBook Studio II drives still under El Capitan, even when the Drive Manager is not installed or working. Is the Drive Manager necessary to reflect both harddisks as one drive and thus created the raid level? Or is it just like a monitoring/configuring tool?
Any advice, hint or tip is very appreciated! Many thanks in advance!