ubinfo -a (vol_size fixed)

gistfile1.txt

root@:~# ubinfo -a
UBI version:                    1
Count of UBI devices:           1
UBI control device major/minor: 10:60
Present UBI devices:            ubi0

ubi0
Volumes count:                           3
Logical eraseblock size:                 126976 bytes, 124.0 KiB
Total amount of logical eraseblocks:     4065 (516157440 bytes, 492.2 MiB)
Amount of available logical eraseblocks: 7 (888832 bytes, 868.0 KiB)
Maximum count of volumes                 128
Count of bad physical eraseblocks:       0
Count of reserved physical eraseblocks:  80
Current maximum erase counter value:     2
Minimum input/output unit size:          2048 bytes
Character device major/minor:            251:0
Present volumes:                         0, 1, 2

Volume ID:   0 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        579 LEBs (73519104 bytes, 70.1 MiB)
State:       OK
Name:        rootfs_a
Character device major/minor: 251:1
-----------------------------------
Volume ID:   1 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        579 LEBs (73519104 bytes, 70.1 MiB)
State:       OK
Name:        rootfs_b
Character device major/minor: 251:2
-----------------------------------
Volume ID:   2 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        2816 LEBs (357564416 bytes, 341.0 MiB)
State:       OK
Name:        configuration
Character device major/minor: 251:3