New Problem faced after recreating the corrupt partition

[Sam Caprio]

Hello Everyone.

I have a corrupt image / boot loop problem on my Access Point - Model 9120 AXI

Error - verify signature failed for /bootpart/part2/ramfs_data_cisco.cpio.lzma

I recreated the part 2 using below command :

(u-boot)> ubi part fs
(u-boot)> ubi remove part2  
(u-boot)> ubi create part2 
(u-boot)> boot
however upon hitting boot I face below problem which I think where the problem. I have omitted normal logs output from below. Could someone explain how to solve it?

u-boot> ubi part fs
ubi0: attaching mtd3
ubi0: scanning is finished
ubi0: attached mtd3 (name "mtd=2", size 1017 MiB)
ubi0: PEB size: 262144 bytes (256 KiB), LEB size: 253952 bytes
ubi0: min./max. I/O unit sizes: 4096/4096, sub-page size 4096
ubi0: VID header offset: 4096 (aligned 4096), data offset: 8192
ubi0: good PEBs: 4069, bad PEBs: 0, corrupted PEBs: 0
ubi0: user volume: 3, internal volumes: 1, max. volumes count: 128
ubi0: max/mean erase counter: 37/20, WL threshold: 4096, image sequence number: 839138221
ubi0: available PEBs: 33, total reserved PEBs: 4036, PEBs reserved for bad PEB handling: 80
u-boot> ubi remove part2
Remove UBI volume part2 (id 1)
u-boot> ubi create part2
No size specified -> Using max size (592470016)
Creating dynamic volume part2 of size 592470016
u-boot> boot
Mounting UBI device fs
ubi0: detaching mtd3
ubi0: mtd3 is detached
ubi0: attaching mtd3
ubi0: scanning is finished
ubi0: attached mtd3 (name "mtd=2", size 1017 MiB)
ubi0: PEB size: 262144 bytes (256 KiB), LEB size: 253952 bytes
ubi0: min./max. I/O unit sizes: 4096/4096, sub-page size 4096
ubi0: VID header offset: 4096 (aligned 4096), data offset: 8192
ubi0: good PEBs: 4069, bad PEBs: 0, corrupted PEBs: 0
ubi0: user volume: 3, internal volumes: 1, max. volumes count: 128
ubi0: max/mean erase counter: 37/21, WL threshold: 4096, image sequence number: 839138221
ubi0: available PEBs: 0, total reserved PEBs: 4069, PEBs reserved for bad PEB handling: 80
Load Addr 0x10000000
Mount UBIFS PARTITION part2 ...
Error reading superblock on volume 'ubi0:part2' errno=-30!
ubifsmount - mount UBIFS volume

Now coming to the mail logs where It again goes into u-boot without pressing esc button automatically and got stuck with below logs :
Hit ESC key to stop autoboot: 3  2  1 MG link 1G
 0
Mounting UBI device fs
ubi0: attaching mtd3
ubi0: scanning is finished
UBI init error 22
Error: Unable to ubi mount mtd device fs
u-boot>

[jagan.chowdam]

Have you tried recovery procedure given in the following document?

https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9120axi-access-point/217537-repairing-c9120-c9115-access-points-from.html

Jagan Chowdam

/**Pls rate useful responses**/

[Leo Laohoo]

It is easier and a lot faster to RMA the AP.

[Rich R]

Re-flashing the AP using the u-boot procedure Jagan shared takes a few minutes and definitely going to be a whole lot quicker than RMA Leo ...  I've used it a few times.