root@acqua:~# ./testnand.sh 

ubiformat /dev/mtd5
ubiformat: mtd5 (nand), size 260046848 bytes (248.0 MiB), 1984 eraseblocks of 131072 bytes (128.0 KiB), min. I/O size 2048 bytes
libscan: scanning eraseblock 1983 -- 100 % complete  
ubiformat: 1980 eraseblocks have valid erase counter, mean value is 7
ubiformat: 4 bad eraseblocks found, numbers: 1980, 1981, 1982, 1983
ubiformat: formatting eraseblock 1983 -- 100 % complete  

ubiattach -p /dev/mtd5
ubi0: attaching mtd5
ubi0: scanning is finished
ubi0: attached mtd5 (name "rootfs", size 248 MiB)
ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096
ubi0: good PEBs: 1980, bad PEBs: 4, corrupted PEBs: 0
ubi0: user volume: 0, internal volumes: 1, max. volumes count: 128
ubi0: max/mean erase counter: 16/8, WL threshold: 4096, image sequence number: 1716823466
ubi0: available PEBs: 1940, total reserved PEBs: 40, PEBs reserved for bad PEB handling: 36
ubi0: background thread "ubi_bgt0d" started, PID 1424
UBI device number 0, total 1980 LEBs (251412480 bytes, 239.8 MiB), available 1940 LEBs (246333440 bytes, 234.9 MiB), LEB size 126976 byte
s (124.0 KiB)

ubimkvol /dev/ubi0 -N rootfs -m
Set volume size to 246333440
Volume ID 0, size 1940 LEBs (246333440 bytes, 234.9 MiB), LEB size 126976 bytes (124.0 KiB), dynamic, name "rootfs", alignment 1

mount -t ubifs /dev/ubi0_0 /mnt/ubifs
UBIFS (ubi0:0): default file-system created
UBIFS (ubi0:0): background thread "ubifs_bgt0_0" started, PID 1439
UBIFS (ubi0:0): UBIFS: mounted UBI device 0, volume 0, name "rootfs"
UBIFS (ubi0:0): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
UBIFS (ubi0:0): FS size: 244682752 bytes (233 MiB, 1927 LEBs), journal size 12316672 bytes (11 MiB, 97 LEBs)
UBIFS (ubi0:0): reserved for root: 4952683 bytes (4836 KiB)
UBIFS (ubi0:0): media format: w4/r0 (latest is w4/r0), UUID 835070EB-54B1-48A8-8159-D5DC1A6F3F30, small LPT model

cp -d -r /sam-ba_3.2.1 /mnt/ubifs/

sync

umount /mnt/ubifs
UBIFS (ubi0:0): un-mount UBI device 0
UBIFS (ubi0:0): background thread "ubifs_bgt0_0" stops

mount -t ubifs /dev/ubi0_0 /mnt/ubifs
UBIFS (ubi0:0): background thread "ubifs_bgt0_0" started, PID 1451
UBIFS (ubi0:0): UBIFS: mounted UBI device 0, volume 0, name "rootfs"
UBIFS (ubi0:0): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
UBIFS (ubi0:0): FS size: 244682752 bytes (233 MiB, 1927 LEBs), journal size 12316672 bytes (11 MiB, 97 LEBs)
UBIFS (ubi0:0): reserved for root: 4952683 bytes (4836 KiB)
UBIFS (ubi0:0): media format: w4/r0 (latest is w4/r0), UUID 835070EB-54B1-48A8-8159-D5DC1A6F3F30, small LPT model

diff -rq sam-ba_3.2.1/ /mnt/ubifs/sam-ba_3.2.1/
if nothing appears, diff ended well

umount /mnt/ubifs
UBIFS (ubi0:0): un-mount UBI device 0
UBIFS (ubi0:0): background thread "ubifs_bgt0_0" stops

ubidetach -d 0
ubi0: detaching mtd5
ubi0: mtd5 is detached
root@acqua:~#