FTL(8) FTL(8)
NAME
ftl - Flash Translation Layer formatter
SYNOPSIS
disk/ftl flashsize secsize kfsfile output
DESCRIPTION
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 ini-
tialise the flash memory of a suitable device (see
flash(3)).
The other arguments describe the characteristics of the
flash memory:
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 struc-
tures and a reserve pool of 5% to reduce the number of erase
cycles; see ftl(3)).
SOURCE
/appl/cmd/disk/ftl.b
SEE ALSO
flash(3), ftl(3), kfs(3)
Page 1 Plan 9 (printed 12/21/24)