What is HIT archive data

Hello friends,

After a firmware package was unpacked, it contains those image files:

root@gpl-vm:/GPL/PX-8600/firmware# find ./* -maxdepth 1 -exec file {} \+
./rec:                       directory
./rec/recovery:              data
./storage:                   directory
./storage/storage_ubi.img:   HIT archive data
./system:                    directory
./system/system_ubi.img:     HIT archive data
./userdata:                  directory
./userdata/userdata_ubi.img: HIT archive data
./zimage:                    directory
./zimage/zImage:             data
root@gpl-vm:/GPL/PX-8600/firmware#

'file' ('man file') uses magic ('man magic'). Magic files and file documentation can be grepped but none show me any clues wrt UB HIT. I suggest you get the source and grep that for clues or contact the maintainer or post the location of the PX-8600 firmware package so members can inspect it themselves.