NOR "bad blocks"

Bernhard Priewasser priewasser at
Thu Oct 27 04:04:03 EDT 2005

Hi all,

just a thought...
Same as NAND, NOR flashes mostly have an endurance of guaranted 100K 
program/erase cycles.
If a block reaches this (theoretical) value, it should be recognized as 
bad block if erase fails; e.g. not conaining only 0xFF after erase on 
NAND. (I don't know if the "100K" erase cycle boundary is mostly 
responsible for this)
But obviously a block can wear out on NOR too after the max. number of 
erase cycles. (How) can this be recognized, handled?


More information about the linux-mtd mailing list