managed to run mtdinfo on the working original vu nfi.. here is output
root@vuuno:/tmp# ./mtdinfo -a
Count of MTD devices: 8
Present MTD devices: mtd0, mtd1, mtd2, mtd3, mtd4, mtd5, mtd6, mtd7
Sysfs interface supported: no
mtd0
Name: rootfs
Type: nand
Eraseblock size: 524288 bytes, 512.0 KiB
Amount of eraseblocks: 228 (119537664 bytes, 114.0 MiB)
Minimum input/output unit size: 2048 bytes
Sub-page size: unknown
OOB size: 64 bytes
Bad blocks are allowed: true
Device is writable: true
mtd1
Name: kernel
Type: nand
Eraseblock size: 524288 bytes, 512.0 KiB
Amount of eraseblocks: 8 (4194304 bytes, 4.0 MiB)
Minimum input/output unit size: 2048 bytes
Sub-page size: unknown
OOB size: 64 bytes
Bad blocks are allowed: true
Device is writable: true
mtd2
Name: boot
Type: nand
Eraseblock size: 524288 bytes, 512.0 KiB
Amount of eraseblocks: 8 (4194304 bytes, 4.0 MiB)
Minimum input/output unit size: 2048 bytes
Sub-page size: unknown
OOB size: 64 bytes
Bad blocks are allowed: true
Device is writable: true
mtd3
Name: splash
Type: nand
Eraseblock size: 524288 bytes, 512.0 KiB
Amount of eraseblocks: 4 (2097152 bytes, 2.0 MiB)
Minimum input/output unit size: 2048 bytes
Sub-page size: unknown
OOB size: 64 bytes
Bad blocks are allowed: true
Device is writable: true
mtd4
Name: cfe
Type: nand
Eraseblock size: 524288 bytes, 512.0 KiB
Amount of eraseblocks: 2 (1048576 bytes, 1024.0 KiB)
Minimum input/output unit size: 2048 bytes
Sub-page size: unknown
OOB size: 64 bytes
Bad blocks are allowed: true
Device is writable: true
mtd5
Name: mac
Type: nand
Eraseblock size: 524288 bytes, 512.0 KiB
Amount of eraseblocks: 1 (524288 bytes, 512.0 KiB)
Minimum input/output unit size: 2048 bytes
Sub-page size: unknown
OOB size: 64 bytes
Bad blocks are allowed: true
Device is writable: true
mtd6
Name: env
Type: nand
Eraseblock size: 524288 bytes, 512.0 KiB
Amount of eraseblocks: 1 (524288 bytes, 512.0 KiB)
Minimum input/output unit size: 2048 bytes
Sub-page size: unknown
OOB size: 64 bytes
Bad blocks are allowed: true
Device is writable: true
mtd7
Name: nvm
Type: nand
Eraseblock size: 524288 bytes, 512.0 KiB
Amount of eraseblocks: 2 (1048576 bytes, 1024.0 KiB)
Minimum input/output unit size: 2048 bytes
Sub-page size: unknown
OOB size: 64 bytes
Bad blocks are allowed: true
Device is writable: true
root@vuuno:/tmp#