perl -E 'say "F1AA" x 262144' | xxd -r -p - F1AA.bin
hexdump F1AA.bin (-v to look at the entire file)
0000000 aaf1 aaf1 aaf1 aaf1 aaf1 aaf1 aaf1 aaf1
*
0080000
perl -E 'say "F1AA" x 262144' | xxd -r -p - F1AA.bin
hexdump F1AA.bin (-v to look at the entire file)
0000000 aaf1 aaf1 aaf1 aaf1 aaf1 aaf1 aaf1 aaf1
*
0080000