This is ZTE N986 device tree for compiling with TWRP and OmniROM's source-code
ROM 1.0.x is using old MTK's partitions layout with 2 separate internal data partitions: /data & /sdcard
ROM 2.0.x is using new "datamedia" layout
EBR1 (& EBR2 in ROM 1.0.x) ➔ Used for defining internal partitions sizes (usually backed-up for restoring internal partitions sizes after repartitioned with MeteOS ROM Edit)
NVRAM ➔ Hard-IMEI that extracted to /data/nvram when the devices first booting (Can be restored for GSM-GSM phone with some MTK proprietary app, unfortunately not for CDMA-GSM, like N986(D))
SEC_RO ➔ Somewhat related to NVRAM (usually your IMEI 2 became invalid if this partition corrupted/empty)
LOGO ➔ The initial boot logo you see when you powering your device, can be edited with LogoBuilder