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Date: Wed, 09 Dec 1998 03:26:20 +0900
From: Matsumura Naoki <j5306050@educ.cs.gunma-u.ac.jp>
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Subject: [FreeBSD-users-jp 36252] What is raw device?
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$B$3$s$K$A$O!"$^$D$`$i$G$9!#(B

  % tar cf /dev/fd0c .
$B$H$9$k$H!"%U%m%C%T!<$K(Btar$B%U%!%$%k$,=q$-$3$^$l$^$9$,!"(B
$B$3$l$O!V2?%U%)!<%^%C%H!W$H$$$&$s$G$7$g$&$+!#(B
$B!V(Btar$B%U%)!<%^%C%H!W$G$$$$$s$G$7$g$&$+!)(B

$B$^$?!"$3$l$C$F$$$o$f$k!V(Braw$B%G%P%$%97PM3$G=q$-9~$s$G$$$k!W(B
$B$H8@$C$F$$$$$N$G$7$g$&$+!#(B

$B$H$&$$$&$N$O!"$=$N%U%m%C%T!<$N%U%)!<%^%C%H$,(Bufs$B$G(B
$B$"$m$&$H!"(BDOS$B%U%)!<%^%C%H$G$"$m$&$H!"A4$/4X78$J$/(B
$B=q$-9~$^$l$k$N$G!"(B
  $B!V$3$l$,$$$o$f$k(Braw device$B$+$J$!!W(B
$B$H;W$C$?$o$1$G$9!#(B

$B$7$+$7(B
  % tar cf /dev/rfd0c .
$B$H$9$k$H!"(B
  tar (child): can't write to /dev/rfd0 : Invalid argument
$B$HE\$i$l$k$N$G!"$d$C$Q$j0c$&$N$G$7$g$&$+!#(B
# raw device$B$N$D$b$j$G!V(Br$B!W(Bfd0c$B$H$7$^$7$?!#(B


$B$"$H!"(B
  % dd if=boot.flp of=/dev/fd0c
$B$H$$$&$N$O!V(Braw device$B7PM3!W$GFI$_=q$-$7$F$$$k$N$G$7$g$&$+!#(B

$B$=$l$+$i!">e$N$h$&$K$7$F:n$C$?(Btar$B%U%!%$%k$O!"(B
  % tar tf /dev/fd0c
$B0J30$K$b!"(B
  % dd if=/dev/fd0c of=hoge.tar
$B$d(B
  % cat /dev/fd0c > hoge.tar
$B$,2DG=$G$9$,(B(hoge.tar$B$N%5%$%:$OBg$-$/$J$j$^$9$,(B)$B!"(B
dd$B$O$H$b$+$/!"(Bcat$B$r;H$&$N$O$^$:$$$3$H$J$N$G$7$g$&$+!#(B
# $B!a!V(Bboot.flp$B$r(Bcat$B$G%3%T!<$7$F$b$$$$$b$N$+!W(B


$B$h$/$o$+$C$F$J$$$N$G!"8@$$$?$$$3$H$,DL$8$k$+?4G[$G$9(B(^^;

---
P.S.
$B@hF|<ALd$7$?(Bmp3$B%(%s%3!<%@$N7o$O!"8e$[$I(BQandA$B$KAw$C$F$*$-$^$9!#(B

