[Yaffs] minimun partition size require to mount the YAFFS!!!

Hi,
Can anybody tell me what is the minimum partition size that would
require YAFFS2 to be mounted?
On my system i am seeing YAFFS2 mount is failing for a given partition
of size 1MB ( 8 blocks ie 8 * 128K ).

7328              dev->internalEndBlock <= (dev->internalStartBlock +
dev->nReservedBlocks + 2)) {   /* otherwise it is too        small */
7329                 T(YAFFS_TRACE_ALWAYS,
7330                   (TSTR
7331                    ("yaffs: NAND geometry problems: chunk size
%d, type is yaffs%s, inbandTags %d "
7332                     TENDSTR), dev->totalBytesPerChunk,
dev->isYaffs2 ? "2" : "", dev->inbandTags));
7333                 return YAFFS_FAIL;
7334         }

--
Regards,
Murali N