Merge http://mail-index.netbsd.org/source-changes/2013/01/21/msg040708.html
RCS Id update.
Slightly modify sd attach message, as kernel does.

before:
 sd0: HITACHI DK315C-14 rev H7H6, 2807459 512 byte blocks

after:
 sd0: HITACHI DK315C-14 rev H7H6, 512 bytes/sect x 2807459 sectors
Merge http://mail-index.netbsd.org/source-changes/2013/01/21/msg040709.html
RCS Id update.