Date: Sun, 25 Sep 2016 20:36:15 -0700 From: David Christensen <dpchrist@holgerdanske.com> To: freebsd-questions@freebsd.org Subject: FreeBSD-10.3-RELEASE-i386-memstick.img installer changes contents of USB flash drive? Message-ID: <56532342-f2d4-377d-605b-2e1b5bfb2160@holgerdanske.com>
next in thread | raw e-mail | index | archive | help
freebsd-questions:
Using Debian GNU/Linux 7.11, I downloaded
FreeBSD-10.3-RELEASE-i386-memstick.img and burned it to a USB flash drive:
# time dd if=FreeBSD-10.3-RELEASE-i386-memstick.img of=/dev/sdc
bs=1M conv=sync; sync
659+1 records in
660+0 records out
692060160 bytes (692 MB) copied, 141.567 s, 4.9 MB/s
real 2m21.571s
user 0m0.004s
sys 0m1.696s
If I compute the checksum immediately after burning, it matches the
published checksum:
# time dd if=/dev/sdc count=1350917 | sha256sum -b
ab104a30627754bb8d39eeff3c5c5a4a15537d32c749e2b9841b34cb08e17eb0 *-
1350917+0 records in
1350917+0 records out
691669504 bytes (692 MB) copied, 43.252 s, 16.0 MB/s
real 0m43.257s
user 0m7.236s
sys 0m3.496s
# grep
ab104a30627754bb8d39eeff3c5c5a4a15537d32c749e2b9841b34cb08e17eb0
CHECKSUM.SHA256-FreeBSD-10.3-RELEASE-i386
SHA256 (FreeBSD-10.3-RELEASE-i386-memstick.img) =
ab104a30627754bb8d39eeff3c5c5a4a15537d32c749e2b9841b34cb08e17eb0
But after using the USB flash drive to install FreeBSD, the checksum has
changed:
# dd if=/dev/sdc count=1350917 | sha256sum -b
1350917+0 records in
1350917+0 records out
bd159b85486322febe992226bbec9c86d96d70dd1e5a8b7c6f0bb9d29eb50df3 *-
691669504 bytes (692 MB) copied, 42.989 s, 16.1 MB/s
Therefore, the FreeBSD-10.3-RELEASE-i386-memstick.img installer has
changed the contents of the USB flash drive.
Why?
David
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?56532342-f2d4-377d-605b-2e1b5bfb2160>