people, what is happening here? is that something at the end of file? size of the file?

noch@debed ~ $ dd if=/dev/zero of=/tmp/test count=1
1+0 records in
1+0 records out
512 bytes copied, 0.000508732 s, 1.0 MB/s
noch@debed ~ $ hexdump /tmp/test
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
0000200
noch@debed ~ $ dd if=/dev/zero of=/tmp/test count=2
2+0 records in
2+0 records out
1024 bytes (1.0 kB, 1.0 KiB) copied, 0.000296434 s, 3.5 MB/s
noch@debed ~ $ hexdump /tmp/test
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
0000400
noch@debed ~ $ dd if=/dev/zero of=/tmp/test count=3
3+0 records in
3+0 records out
1536 bytes (1.5 kB, 1.5 KiB) copied, 0.000144709 s, 10.6 MB/s
noch@debed ~ $ hexdump /tmp/test
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
0000600

#eof #hexdump #dd #unix #linux #console #question

բնօրինակ սփիւռքում(եւ մեկնաբանութիւննե՞ր)