Hello everyone. I am also having a hard time with this and I was referred here. > Can you please provide the OOB dumps for the working case? This is the dump of a working mikrotik boot partition, created with "nanddump -ni" under 2.6.19.2 It should contain a single file named "kernel" http://www.alyf.net/rb/boot-dump.bz2 The chip is a Hynix HY27US08121A, with block size 16384, page size 512, OOB size 16 Mounting this partition under 2.6.19.2 results in "bad block" errors for the first 128 blocks, but I don't think this affects the ability of nanddump to show the actual OOB layout. Feel free to slap me if I'm wrong... Andrea