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root@phyboard-mira-imx6-3:~# mtdinfo /dev/mtd2
mtd2
Name: root
Type: nand
Eraseblock size: 131072 bytes, 128.0 KiB
Amount of eraseblocks: 8152 (1068498944 bytes, 1019.0 MiB)
Minimum input/output unit size: 2048 bytes
Sub-page size: 2048 bytes
OOB size: 128 bytes
Character device major/minor: 90:4
Bad blocks are allowed: true
Device is writable: true

root@phyboard-mira-imx6-3:~# ubiattach -p /dev/mtd2
[   75.107718] ubi0: default fastmap pool size: 256
[   75.112379] ubi0: default fastmap WL pool size: 128
[   75.117344] ubi0: attaching mtd2
[   77.969530] ubi0: scanning is finished
[   77.984299] ubi0 warning: ubi_eba_init: cannot reserve enough PEBs for bad PEB handling, reserved 60, need 156
[   77.998234] ubi0: attached mtd2 (name "root", size 1007 MiB)
[   78.003919] ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
[   78.010951] ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
[   78.017807] ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096
[   78.024788] ubi0: good PEBs: 8052, bad PEBs: 4, corrupted PEBs: 0
[   78.030913] ubi0: user volume: 3, internal volumes: 1, max. volumes count: 128
[   78.038167] ubi0: max/mean erase counter: 359/260, WL threshold: 4096, image sequence number: 23797
[   78.047241] ubi0: available PEBs: 0, total reserved PEBs: 8052, PEBs reserved for bad PEB handling: 60
[   78.056582] ubi0: background thread "ubi_bgt0d" started, PID 261
UBI device number 0, total 8052 LEBs (1022410752 bytes, 975.0 MiB), available 0 LEBs (0 bytes), LEB size 126976 bytes (124.0 KiB)
root@phyboard-mira-imx6-3:~# mount -t ubifs /dev/ubi0_2 ubi2/
[  462.501195] UBIFS (ubi0:2): background thread "ubifs_bgt0_2" started, PID 287
[  462.528461] UBIFS (ubi0:2): recovery needed
[  462.590848] UBIFS (ubi0:2): recovery completed
[  462.597063] UBIFS (ubi0:2): UBIFS: mounted UBI device 0, volume 2, name "root"
[  462.604297] UBIFS (ubi0:2): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
[  462.614251] UBIFS (ubi0:2): FS size: 1002983424 bytes (956 MiB, 7899 LEBs), journal size 9023488 bytes (8 MiB, 72 LEBs)
[  462.625097] UBIFS (ubi0:2): reserved for root: 0 bytes (0 KiB)
[  462.630966] UBIFS (ubi0:2): media format: w4/r0 (latest is w5/r0), UUID 6506DC92-A1EE-467A-9E49-B82602C74686, small LPT model

root@phyboard-mira-imx6-3:~# ubinfo /dev/ubi0_0
Volume ID:   0 (on ubi0)
Type:        static
Alignment:   1
Size:        67 LEBs (8507392 bytes, 8.1 MiB)
Data bytes:  6201808 bytes (5.9 MiB)
State:       OK
Name:        kernel
Character device major/minor: 245:1
root@phyboard-mira-imx6-3:~# ubinfo /dev/ubi0_1
Volume ID:   1 (on ubi0)
Type:        static
Alignment:   1
Size:        9 LEBs (1142784 bytes, 1.1 MiB)
Data bytes:  46056 bytes (45.0 KiB)
State:       OK
Name:        oftree
Character device major/minor: 245:2
root@phyboard-mira-imx6-3:~# ubinfo /dev/ubi0_2
Volume ID:   2 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        7910 LEBs (1004380160 bytes, 957.9 MiB)
State:       OK
Name:        root