UBI : Pairing up PEB

[VenuGopaL A]

Hi All,

I am trying to speed up UBI. In FAQ section, they have mentioned about
merging two or more PEB's and treating them as one composite PEB .
I am not able to find any documentation over the net.

I tried changing the PEB size and LEB size during ubinizing the image
but the file system did not mount and the target crashed.

Please put some light on the pairing up of PEBs.
Target has 512MB OneNAND chip.

Appreciate your help.

-- 
Thanks & Regards
Venu