usage of the reseverd byte in oob area

[Raj Kumar Yadav]

Hi,
 
The oob offset 0x4 in small page (512 byte pagesize) flash is marked as
reserved.
Is this byte reserved for any specifc present or defined future h/w or
s/w use? 
Or left for the software to interpret and use it suitabily? 
 
I have a requirement of 7 bytes for the ECC code (currently it is 6
bytes).
Can I use the reserved byte as extra bytes for the ECC code of 7 bytes?
 
As the remaining 8 bytes of OOB area are used by the JFFS2 and YAFFS1. 
 
 
 
Thanks,
Raj Kumar Yadav