UBIFS

http://www.linux-mtd.infradead.org/doc/ubi.html

** need to pay attention to kernel version and utiltools version.

mtd-utils# mkfs.ubifs/mkfs.ubifs -r filesystem/ -F -o ubifs.img -m 2048 -e 126976 -c 1580

• Create ubinize.cfg file and write the contents into it

mtd-utils# vi ubinize.cfg
  [ubifs]                <== Section header
  mode=ubi              <== Volume mode (other option is static)
  image=ubifs.img       <== Source image
  vol_id=0              <== Volume ID in UBI image
  vol_size=192MiB       <== Volume size
  vol_type=dynamic      <== Allow for dynamic resize
  vol_name=rootfs       <== Volume name
  vol_flags=autoresize  <== Autoresize volume at first mount

mtd-utils# ubi-utils/ubinize -o ubi.img -m 2048 -p 128KiB -s 512 -O 2048 ubinize.cfg

Symbol	Meaning	Value for XO test case
SP	PEB Size	128KiB
SL	LEB Size	128KiB - 2 * 2KiB = 124 KiB
P	Total number of PEBs on the MTD device	200MiB / 128KiB = 1600
B	Number of PEBs reserved for bad PEB handling	1% of P = 16
O	The overhead related to storing EC and VID headers in bytes, i.e. O = SP - SL	4KiB