Core Storage Encryption on RAID External Drive
Hello, I have external hard disk "WD My Passport Pro". It's set up in RAID 0 (Mirroring). I have stored there backups etc. I wanted to encrypt entire drive with File Vault, but i couldn't with error something like "You can't convert Apple Raid to core storage". I have found work-around for this, which formats entire drive and then create core storage volume which later is able to be encrypted. I have been able to do that by following commands
diskutil list
diskutil cs createLVG DiskName disk4
diskutil cs list
diskutil cs createLV HDD_UID JHFS+ DiskName 100% -stdinpassphrase
This way worked perfectly, and i have ended up with encrypted raid 0 external hard drive, which works properly, asks for password before mounting properly, works fine between few OSX machines. My questions are
1. Why apple did not allowed this way to include in Finder interface but instead it results with error while it's possible to do that via command line? Is that because it can't be done without formatting and it would sound bad if they can't do that without formatting? and if can't be done without formatting - why? OSX can encrypt entire master drive on the go while user use system, files and applications.
2.If way i have used is fully safe for drive and data stored on drive and if drive still actually works in RAID 0 (mirroring) (WD Drive Utilities claims that both raid disks are online and both are displayed in Disk Utility)
I have also successfully encrypted another RAID external hard drive which also works properly, many people says also that this way works fine. But i would like to double or triple check if that's safe and proper way. I would like to hear replies only from people which are highly confident of their knowledge about this problem.
3.Question less related to problem. If Apple File Vault 2 is actually safe like TrueCrypt ? Or there might be some backdoors for authorities ? (I have not stored any key and password in iCloud or Keychain, if it's stored obviously encryption is less secure)
Sources i have used to found this tricky way
http://blog.bitmelt.com/2012/09/encrypted-raid-disk-on-os-x-mountain.html
http://apple.stackexchange.com/questions/81504/why-doesnt-filevault-work-on-a-raid-volume
MacBook Air, OS X Server