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Add instructions for creating a ramdisk root image. These likely need

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to be augmented with instructions for those platforms that have
/boot/loader.
This commit is contained in:
imp 2006-11-24 18:53:45 +00:00
parent 491108697b
commit 03f10acc6e
1 changed files with 18 additions and 1 deletions
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19
share/man/man4/md.4
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@ -7,7 +7,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd March 9, 2001
.Dd November 24, 2006
.Dt MD 4
.Os
.Sh NAME
@ -55,6 +55,23 @@ Backing store is allocated from swap space.
.Pp
For more information, please see
.Xr mdconfig 8 .
.Sh EXAMPLES
To create a kernel with a ramdisk or MD file system, your kernel config
needs the following options:
.Bd -literal -ofset indent
options MD_ROOT #MD is a potential root device
options MD_ROOT_SIZE=8192 # 8MB ram disk
makeoptions MFS_IMAGE=/h/foo/ARM-MD
options ROOTDEVNAME=\"ufs:md0\"
.Ed
The image in
.Pa /h/foo/ARM-MD
will be loaded as the initial image each boot.
To create the image to use, please follow the steps to create a file-backed
disk found in the
.Xr mdconfig 8
man page.
Other tools will also create these images, such as NanoBSD.
.Sh SEE ALSO
.Xr disklabel 5 ,
.Xr disklabel 8 ,