ftl - Flash Translation Layer formatter disk/ftl flashsize secsize kfsfile output Ftl reads a file system image in kfs (3) format from kfsfile and adds the data structures needed to make it a valid image for the Flash Translation Layer driver ftl (3). The result is written to the output file, which can be copied to initialise the flash memory of a suitable device (see flash (3)).

The other arguments describe the characteristics of the flash memory: .TF flashsize

flashsize The size in bytes of the flash memory to which output will be copied; exactly flashsize bytes will be written to output .

secsize The effective erase unit (sector) size in bytes of the flash memory, as seen by the processor, having allowed for bus width. For example, a bank of flash formed from byte-wide flash chips, each with 16kbyte sectors, wired across a 4 byte bus, might have an effective erase unit size of 64kbytes.

The kfsfile must not be larger than the size (length) of the ftldata file provided by ftl (3) for the target flash device or partition. (That size is invariably less than the size of the raw flash, owing to the overhead of FTL data structures and a reserve pool of 5% to reduce the number of erase cycles; see ftl (3)).

/appl/cmd/disk/ftl.b flash (3), ftl (3), kfs (3)