Sorry, I can see the flash writes here starting at 32KB testing against
the default file (/tmp/native_flash.XXXXXX) as well as a hard-coded path
(-f simflash.bin).
$ xxd -s 0x8000 -l 128 simflash.bin
0008000: e231 8ab9 8c42 b07f 5382 e0ac 8efc 85b1 .1...B..S.......
0008010: 0040 0000 0100 00ff ffff ffff ffff ffff .@..............
0008020: ffff ffff ffff ffff ffff ffff ffff ffff ................
0008030: ffff ffff ffff ffff ffff ffff ffff ffff ................
0008040: ffff ffff ffff ffff ffff ffff ffff ffff ................
0008050: ffff ffff ffff ffff ffff ffff ffff ffff ................
0008060: ffff ffff ffff ffff ffff ffff ffff ffff ................
0008070: ffff ffff ffff ffff ffff ffff ffff ffff ................
... where the NFFS magic number is clearly visible
(https://github.com/apache/mynewt-core/blob/master/fs/nffs/src/nffs_priv.h#L48)
K.
