After upgrading an OS7030 from original fimrware to 4.30k to get CLI on analog trunks system no longer boots - mem light flickers whilst loading but run light stays solid.

I've hooked up a serial connection, likely relevant sections of console output are:

OS7030 Boot version V0.24 (2008.07.14) (Jul 14 2008 - 16:59:05)
[stuff cut]
Linux version 2.6.13-rtl (root@OS7030) (gcc version 3.3.2) #440 Mon Apr 6 15:25:
59 KST 2009
[stuff cut]
NAND flash chip-0: number of bad blocks = 0 (reserved max. 100)
NAND flash chip-0: number of partitions = 9
FD_Init is successful
/dev/devfs_ufd0:LLD_ReadPage: Uncorrectable ECC error (block=0, page=0)
stored ECC = 00 00 00
calced ECC = 01 01 00
LLD_ReadPage: Retry ECC Check using the 2nd ECC...
LLD_ReadPage: Uncorrectable ECC error (block=0, page=0)
stored ECC = 00 00 00
calced ECC = 01 01 01
LLD_ReadPage: Retry ECC Check using the 3rd ECC...
LLD_ReadPage: Uncorrectable ECC error (block=0, page=0)
stored ECC = 00 00 00
calced ECC = 01 01 01
LLD_ReadPage: Retrying ECC Check has failed.
[PFD] Unhandled error : 8
unknown partition table
[cut]
VFS: Cannot open root device "mtdblock/5" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

The distributor's support site I have access to doesn't have any notes on what to do after a failed upgrade, can anyone help ???