[Q] Correct format/partition layout for usb to auto mount?

I've got a 3TB external drive drive hooked up to my Ouya running CM11 (Android 4.4)

I run Nzbget and Transmission in optware, and use CM primarily as a vehicle for XBMC so I need the space.

I had it in 2 ext4 partitions which needed a init script to mount under the stock OS.

I was hopping to get it working in a less hacky manner under CM.

I tried with the two parts, and no go so i redid it with one big partition with root as the UID and sdcard_rw as the GID.

Still no dice. I can access it in File Manager with elevated permissions, but no go in XBMC or other apps.

Also tried one big exFAT partioning with no luck.

I plugged in an 8g ntfs drive I had and it automounted it no problem.

Anyone know the right way to configure the drive? We're a Linux household so sticking with ext2/3/4 would be ideal. NTFS I would like to avoid.

Thanks

mounting manually for now

System logged this when it failed to automount

EXT4-fs (sdb1): Unrecognized mount option "context=ubject_r:sdcard_external:s0" or missing value

Anyone shed light on this?