Verification Failed during uboot installation

Hi,

I bought an Pogoplug a week ago. While using the manual from http://projects.doozan.com/uboot/ I got the Error: (after typing "./installing_uboot_mtd0.sh"):

# checking for /usr/sbin/nandwrite...
# checking for /usr/sbin/nanddump...
# checking for /usr/sbin/flash_erase...
# checking for /usr/sbin/fw_printenv...
# checking for /etc/fw_env.config...

# Validating existing uBoot...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00080000...
Connecting to jeff.doozan.com (50.116.34.13:80)
valid-uboot.md5      100% |*******************************|  1133  --:--:-- ETA
## Unknown uBoot detected on mtd0: 6c14964b11a51894f55f63081b79e53b
##
## The installer could not detect the version of your current uBoot
## This may happen if you have installed a different uBoot on
## /dev/mtd0 or if you have bad blocks on /dev/mtd0
##
## If you have bad blocks on mtd0, you should not try to install uBoot.
##
## Installation cancelled.

then I read a little bit in this forum and tested this command: "./installing_uboot_mtd0.sh --no-uboot-check". No he begins to install the bootloader, but he ends with this Error Message:

# Installing uBoot
## Installing pinkpogo davygravy-2012-02-20
Connecting to download.doozan.com (50.116.34.13:80)
uboot.mtd0.kwb.md5   100% |*******************************|    32  --:--:-- ETA
Connecting to download.doozan.com (50.116.34.13:80)
uboot.mtd0.kwb       100% |*******************************|   512k 00:00:00 ETA
Erase Total 4 Units
Performing Flash Erase of length 131072 at offset 0x0
MTD Erase failure: Input/output error
Writing data to block 0 at offset 0x0
Bad block at 0, 1 block(s) from 0 will be skipped
Writing data to block 1 at offset 0x20000
Writing data to block 2 at offset 0x40000
Writing data to block 3 at offset 0x60000
Writing data to block 4 at offset 0x80000
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00080000...
## Verifying new uBoot...
Connecting to download.doozan.com (50.116.34.13:80)
uboot.mtd0.kwb.md5   100% |*******************************|    32  --:--:-- ETA
##
##
## VERIFICATION FAILED!
##
## uBoot was not properly installed to mtd0.
##
##
## YOUR DEVICE MAY BE IN AN UNUSABLE STATE.
## DO NOT REBOOT OR POWER OFF YOUR DEVICE
##
##
## Make a backup of /tmp/uboot-mtd0-dump someplace safe and
## then re-run this installer.

And here I am. My Linux knowledge is unfortunately very low. I do not know how to go on. Is there anyone who has ever had this problem and can help me?

@Gididi,


> ## If you have bad blocks on mtd0, you should not
> try to install uBoot.

And as the warning stated, if you have bad blocks on mtd0, you should not install uBoot using this script. What we should do when given this warning is to check the running system dmesg to see if it reports any bad blocks. If there are bad blocks then don't continue the installation. There are other ways to install. And looks like you do have some bad blocks on mtd0.

Here is how I recovered form this situation: http://forum.doozan.com/read.php?3,5728

Finally, if you can't recover using the info in the above linked thread , it is time to get a serial module converter such as this CP2102. Once you have serial module or cable, you can reboot, most likely you will be able to recover.