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More /dev/r<foo> no longer preferred.

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Robert Watson 2002-12-04 22:10:51 +00:00
parent 13a8def0a0
commit da9ebe6d82
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=15168
1 changed files with 10 additions and 10 deletions
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20
en_US.ISO8859-1/books/handbook/disks/chapter.sgml
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@ -1087,7 +1087,7 @@ scsibus1:
<para>Floppy disks are accessed through entries in
<filename>/dev</filename> (like any other device). To access the
raw floppy disk you can use <filename>/dev/rfd<replaceable>X</replaceable></filename>,
raw floppy disk you can use <filename>/dev/fd<replaceable>X</replaceable></filename>,
where <replaceable>X</replaceable> stands for the drive number, usually 0. When the disk is
formatted you can use <filename>/dev/fd<replaceable>X</replaceable></filename>, or
whichever of the other devices named
@ -1120,7 +1120,7 @@ scsibus1:
to format the floppy to its real size, or force them. So you
insert a new 3.5inch floppy disk in your drive and issue:</para>
<screen>&prompt.root; <userinput>/usr/sbin/fdformat /dev/rfd0.1440</userinput></screen>
<screen>&prompt.root; <userinput>/usr/sbin/fdformat /dev/fd0.1440</userinput></screen>
<para>This will take a while... You should notice any disk error
here (this can help you determining which disks are good or
@ -1129,7 +1129,7 @@ scsibus1:
<para>To force the floppy disk size, we will use other entries
in <filename>/dev</filename>. Get the same floppy and issue:
<screen>&prompt.root; <userinput>/usr/sbin/fdformat /dev/rfd0.1720</userinput></screen>
<screen>&prompt.root; <userinput>/usr/sbin/fdformat /dev/fd0.1720</userinput></screen>
<para>It will take some more time than before (forced disks are
slower). When it finishes, you will have a 1720kb floppy disk,
@ -1155,7 +1155,7 @@ scsibus1:
<para>You can run now &man.disklabel.8;
like:</para>
<screen>&prompt.root; <userinput>/sbin/disklabel -B -r -w /dev/rfd0 <replaceable>fdsize</replaceable></userinput></screen>
<screen>&prompt.root; <userinput>/sbin/disklabel -B -r -w /dev/fd0 <replaceable>fdsize</replaceable></userinput></screen>
<para>Replace <replaceable>fdsize</replaceable> with <literal>fd1440</literal>, <literal>fd1720</literal> or whichever size you
want. The last field instructs disklabel which entry to take
@ -1573,7 +1573,7 @@ sa0(ncr1:4:0): Logical unit is in process of becoming ready</screen>
Exabyte tape drive connected to a Sun called
<hostid>komodo</hostid>, use:</para>
<screen>&prompt.root; <userinput>/sbin/rdump 0dsbfu 54000 13000 126 komodo:/dev/nrsa8 /dev/da0a 2>&amp;1</userinput></screen>
<screen>&prompt.root; <userinput>/sbin/rdump 0dsbfu 54000 13000 126 komodo:/dev/nsa8 /dev/da0a 2>&amp;1</userinput></screen>
<para>Beware: there are security implications to
allowing <filename>.rhosts</filename> authentication. Evaluate your
@ -1615,7 +1615,7 @@ sa0(ncr1:4:0): Logical unit is in process of becoming ready</screen>
<command>tar</command> to an Exabyte tape drive connected to a
Sun called <hostid>komodo</hostid>, use:</para>
<screen>&prompt.root; <userinput>/usr/bin/tar cf komodo:/dev/nrsa8 . 2>&amp;1</userinput></screen>
<screen>&prompt.root; <userinput>/usr/bin/tar cf komodo:/dev/nsa8 . 2>&amp;1</userinput></screen>
<para>For versions without
remote device support, you can use a pipeline and
@ -1660,7 +1660,7 @@ sa0(ncr1:4:0): Logical unit is in process of becoming ready</screen>
<replaceable>user</replaceable>@<replaceable>host</replaceable> is the
user/hostname combination that will be performing the backups, and
<replaceable>backup_device</replaceable> is where the backups should
be written to (e.g., <filename>/dev/nrsa0</filename>).</para>
be written to (e.g., <filename>/dev/nsa0</filename>).</para>
</sect2>
<sect2>
@ -1807,8 +1807,8 @@ sa0(ncr1:4:0): Logical unit is in process of becoming ready</screen>
procedure. Store these notes with the bootable floppy, the
printouts and the backup tapes. You will be so distraught when
restoring that the notes may prevent you from destroying your backup
tapes (How? In place of <command>tar xvf /dev/rsa0</command>, you
might accidentally type <command>tar cvf /dev/rsa0</command> and
tapes (How? In place of <command>tar xvf /dev/sa0</command>, you
might accidentally type <command>tar cvf /dev/sa0</command> and
over-write your backup tape).</para>
<para>For an added measure of security, make bootable floppies and two
@ -2106,7 +2106,7 @@ echo "The floppy has been unmounted and is now ready."]]></programlisting>
&prompt.root; <userinput>disklabel -r -w vn<replaceable>0</replaceable> auto</userinput>
&prompt.root; <userinput>newfs vn<replaceable>0</replaceable>c</userinput>
Warning: 2048 sector(s) in last cylinder unallocated
/dev/rvn0c: 10240 sectors in 3 cylinders of 1 tracks, 4096 sectors
/dev/vn0c: 10240 sectors in 3 cylinders of 1 tracks, 4096 sectors
5.0MB in 1 cyl groups (16 c/g, 32.00MB/g, 1280 i/g)
super-block backups (for fsck -b #) at:
32