Hi tech,
i was a bit confused when i tried to mount my ext4-drive; it was not
obvious to me that i had to pass the -r/-o ro option to mount the disk.
The FAQ is also not very explicit about that:
"Some of them have limited support; for instance read-only. "
http://www.openbsd.org/faq/faq14.html#foreignfs
So i tried the man pages, but they don't mention that ext4 is mountable
at all. A
# mount -t ext2fs /dev/sdb6i /mnt
did not return any error and just did nothing. Maybe this is obvious
that you have to pass the ro-flag, but i thought it would "just work".
That was wrong, obviously, but here is my proposal to add a little
information to the manpages.
Any comments?
Index: mount.8
===================================================================
RCS file: /cvs/src/sbin/mount/mount.8,v
retrieving revision 1.77
diff -u -p -r1.77 mount.8
--- mount.8 8 Sep 2014 04:40:30 -0000 1.77
+++ mount.8 1 Oct 2015 17:06:08 -0000
@@ -381,6 +381,12 @@ with option
.Dq dev :
.Pp
.Dl # mount -u -o dev /var
+.Pp
+Mount an ext4 device with DUID 3eb7f9da875cb9ee on node
+.Pa /mnt/ext4 :
+.Pp
+.Dl # mount -t ext2fs -r 3eb7f9da875cb9ee.i /mnt/ext4
+.Pp
.Sh SEE ALSO
.Xr mount 2 ,
.Xr fstab 5 ,
Index: mount_ext2fs.8
===================================================================
RCS file: /cvs/src/sbin/mount_ext2fs/mount_ext2fs.8,v
retrieving revision 1.14
diff -u -p -r1.14 mount_ext2fs.8
--- mount_ext2fs.8 14 Oct 2010 07:05:43 -0000 1.14
+++ mount_ext2fs.8 1 Oct 2015 17:02:27 -0000
@@ -33,7 +33,7 @@
.Os
.Sh NAME
.Nm mount_ext2fs
-.Nd mount an ext2fs file system
+.Nd mount an ext2/3/4 file system
.Sh SYNOPSIS
.Nm mount_ext2fs
.Op Fl o Ar options
@@ -42,10 +42,12 @@
.Sh DESCRIPTION
The
.Nm
-command attaches an ext2fs file system
+command attaches an ext2/3/4 file system
.Ar special
device on to the file system tree at the point
.Ar node .
+Filesystems of type ext3/4 are only supported in read-only
+mode.
This command is invoked by
.Xr mount 8
when using the syntax
