jffs2 minimum mtd block size

Dear all
I want to ask about minimum mtdblock size which jffs2 need . Why i
ask is because i try to make a 128kbyte mtdblock for my system status storage, it fails. And i repartition to 1MB, it consumes the flash nearly 600KB without any data.
Am i do something wrong? or there is a minimum size for jffs2.
If it is, Could i conclude that jffs2 do not suit to store small
size of data. And which filesystem expertise can suggest me for this purpose?

best regard
mike,lee

It needs at least one or two eraseblocks free for garbage collection; currently it's a little more conservative than that though. You can reduce the reserved space in jffs2_calc_trigger_levels() in build.c

dwmw2