Read Only FS

[David Woodhouse]

Having a large romfs and then a relatively small jffs2 will make it boot 
faster, because the jffs2 scan obviously doesn't have as much to do. But 
you won't get the wear levelling - obviously the R/W bits are then limited 
to the area of flash that you partitioned for jffs2. 

romfs will work happily on /dev/mtdblock<n> devices, either the full 
CONFIG_MTD_BLOCK device which would also allow you to update the contents 
(as long as it's not mounted at the time, of course) or the smaller 
CONFIG_MTD_BLOCK_RO module which provides the same device, just without 
write functionality.

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dwmw2