File:  [DragonFly] / src / nrelease / root / README
Revision 1.12: download - view: text, annotated - select for diffs
Thu Apr 22 16:53:17 2004 UTC (11 years, 3 months ago) by cpressey
Branches: MAIN
CVS tags: HEAD
Split the suggested invocation of fdisk (which is failing for some
people) into two seperate invocations (which seems to work for them.)

The real solution would be to find out why fdisk -IB is troublesome,
but in the interim, this should save some frustration.

Problem-experienced-by:, Devon H. O'Dell, Dave Leimbach
Workaround-stumbled-upon-by: cpressey


    This CDROM boots DragonFly BSD.  Basically what you get is a full base
    system on CD with certain critical directories, such as /tmp, remounted
    read-write using MFS.  Your existing hard drive is not effected by
    booting this CDROM.


    If you just want to play with DragonFly and not mess with your hard disk,
    this CDROM boots into a fully operational console-based system, though
    without swap it should be noted that you are limited by available memory.


    We are currently developing automatic installation tools.  There are none
    on this CD.


    Manual installation of DragonFly onto an HD involve the following sequence
    of commands.  You must be familiar with BSD style UNIX systems to do
    installations manually.  The primary IDE hard drive is typically 'ad0'
    and DragonFly is typically installed onto the first free slice
    (ad0s1 if disk is empty, ad0s2 if your first slice contains
    another OS, etc).  Be careful to substitute the correct partition name
    in the steps below.

	# OPTIONAL STEP: If your disk is already partitioned and you
	# have a spare primary partition on which you want to install
	# Dragonfly, skip this step.  However, sometimes old boot
	# blocks or cruft in the boot area can interfere with the
	# initialization process.  A cure is to zero out the start of
	# the disk before running fdisk.
	# WARNING: This COMPLETELY WIPES and repartitions your hard drive.
	dd if=/dev/zero of=/dev/ad0 bs=32k count=16
	fdisk -I ad0
	fdisk -B ad0

	# If you didn't zero the disk as above, but have a spare slice
	# whose partition type you want to change to UFS, use fdisk(8)

	# This installs boot blocks onto the HD and verifies their 
	# installation.  See note just above the 'reboot' below for
	# things to try if it does not boot from your HD.  If you
	# already have a multi-OS bootloader installed you can skip
	# this step.
	boot0cfg -B ad0
	boot0cfg -v ad0

	# This creates an initial label on the chosen slice of the HD.  If
	# you have problems booting you could try wiping the first 32 blocks
	# of the slice with dd and then reinstalling the label.  Replace
	# 'ad0s1' with the chosen slice.
	# dd if=/dev/zero of=/dev/ad0s1 bs=32k count=16
	disklabel -B -r -w ad0s1 auto

	# Edit the label.  Create various standard partitions.  The typical
	# configurations is:
	#	ad0s1a	256m		This will be your /
	#	ad0s1b	1024m		This will be your swap
	#	ad0s1c			(leave alone)
	#	ad0s1d	256m		This will be your /var
	#	ad0s1e	256m		This will be your /tmp
	#	ad0s1f	8192m		This will be your /usr (min 4096m)
	#	ad0s1g	*		All remaining space to your /home
	#  An example disklabel can be found in /etc/disklabel.ad0s1
	disklabel -e ad0s1

	# Newfs (format) the various filesystems.  Softupdates is not 
	# normally enabled on the root filesystem because large kernel or
	# world installs/upgrades can run it out of space due to softupdate's
	# delayed bitmap freeing code.
	newfs /dev/ad0s1a
	newfs -U /dev/ad0s1d
	newfs -U /dev/ad0s1e
	newfs -U /dev/ad0s1f
	newfs -U /dev/ad0s1g

	# Mount the filesystems
	mount /dev/ad0s1a /mnt
	mkdir /mnt/var
	mkdir /mnt/tmp
	mkdir /mnt/usr
	mkdir /mnt/home
	mount /dev/ad0s1d /mnt/var
	mount /dev/ad0s1e /mnt/tmp
	mount /dev/ad0s1f /mnt/usr
	mount /dev/ad0s1g /mnt/home

	# Copy the CDRom onto the target.  cpdup won't cross mount boundaries
	# on the source (e.g. the MFS remounts) so it takes a few commands.
	cpdup / /mnt
	cpdup /var /mnt/var
	cpdup /etc /mnt/etc
	cpdup /dev /mnt/dev
	cpdup /usr /mnt/usr

	# Cleanup.  Also, with /tmp a partition it is usually reasonable
	# to make /var/tmp a softlink to /tmp
	chmod 1777 /mnt/tmp
	rm -rf /mnt/var/tmp
	ln -s /tmp /mnt/var/tmp

	# Edit /mnt/etc/fstab to reflect the new mounts.  An example fstab
	# file based on the above parameters exists as /mnt/etc/fstab.example
	# which you can rename to /mnt/etc/fstab.
	mv /mnt/etc/fstab.example /mnt/etc/fstab
	vi /mnt/etc/fstab

	# save out your disklabel just in case.  It's a good idea to save
	# it to /etc so you can get at it from your backups.  You do intend
	# to backup your system, yah? :-)  (this isn't critical but it's a
	# good idea).
	disklabel ad0s1 > /mnt/etc/disklabel.ad0s1

    Once you've duplicated the CD onto your HD you have to make some edits
    so the system boots properly from your HD.  Primarily you must remove
    or edit /mnt/boot/loader.conf, which exists on the CD to tell the kernel
    to mount the CD's root partition.

	# Remove /mnt/boot/loader.conf so the kernel does not try to
	# obtain the root filesystem from the CD, and remove the other
	# cruft that was sitting on the CD that you don't need on the HD.
	rm /mnt/boot/loader.conf
	rm /mnt/README*
	rm /mnt/boot.catalog
	rm -r /mnt/rr_moved

    At this point it should be possible to reboot.  The CD may be locked
    since it is currently mounted.  Be careful of the CD drawer closing
    on you when you open it during the reboot.  Remove the CD and allow
    the system to boot from the HD.

    WARNING do not just hit reset, the kernel may not have written out
    all the pending data to your HD.  Either unmount the HD partitions
    or type reboot.

	# reboot
	(remove CD when convenient, be careful of the CD drawer closing on you)

    couple of things to try.  If you can select CHS or LBA mode in your BIOS,
    try changing the mode to LBA.  If that doesn't work boot from the CD
    again and use boot0cfg to turn on packet mode (boot0cfg -o packet ad0).

    Once you have a working HD based system you can clean up /etc/rc.conf
    to enable things like cron, sendmail, setup your networking, and so
    forth.  If 'ifconfig' does not show your networking device you could
    try to kldload it from /modules.  With a recognized network device
    you can ifconfig its IP address or, if you have a DHCP server on your
    network, use 'dhclient <interfacename>' to obtain an IP address from
    the netweork.


    cvsup can be used to obtain the DragonFly cvs repository, the FreeBSD 
    ports tree, and so on and so forth.  'man cvsup' for more information on
    its capabilities.  cvsup is a port (not part of the base system), but
    it IS included on the CD.  The cvsup example files are in
    /usr/share/examples/cvsup.  You will primarily be interested in the
    DragonFly CVS repository, DragonFly-supfile, and the FreeBSD ports,
    FreeBSD-ports-supfile.  Once you have done the initial cvsup of the
    blocks of data that you want you may wish to create a cron job to
    keep it all up to date.  However, please do not run an unattended cvsup
    more then once a day.

    # get the CVS pository (it is placed in /home/dcvs)
    cvsup /usr/share/examples/cvsup/DragonFly-supfile
    # install the source from the CVS hierarchy
    cd /usr
    cvs -R -d /home/dcvs checkout src
    cvs -R -d /home/dcvs checkout dfports

    # get the FreeBSD ports tree (it is directly broken out into /usr/ports)
    cvsup -h /usr/share/examples/cvsup/FreeBSD-ports-supfile

    # buildworld and installworld examples
    cd /usr/src
    make buildworld
    make installworld

    # buildkernel and installkernel examples.  Create your own custom kernel
    # config in /usr/src/sys/i386/conf/<YOURKERNEL> and you can build and
    # install custom kernels.
    # WARNING!  Always keep a fully working backup kernel in / in case
    # you blow it.  Remember that /kernel.old is overwritten when you 
    # make installkernel.  It is usually a good idea to maintain an emergency
    # kernel as /kernel.GENERIC or /kernel.bak.  If all else fails you can
    # still fall back to booting the CD.
    cd /usr/src
    make buildkernel KERNCONF=GENERIC
    make installkernel KERNCONF=GENERIC


    Lets say you blew up your kernel or something else in / and you need to
    boot the CD to fix it.  Remember that you have a fully operational 
    system when booting the CD, but that you have to fsck and mount your
    hard drive (typically onto /mnt) to get at the contents of your HD.

    Your HD is typically an IDE hard drive, so the device is typically
    /dev/ad0.  DragonFly is typically on the first slice, which is
    /dev/ad0s1, and the root partition is always in partition 'a',
    which is /dev/ad0s1a.

    # fsck root before trying to mount it.  
    fsck /dev/ad0s1a
    # mount root read-write onto /mnt
    mount /dev/ad0s1a /mnt
    # copy files from the CD as appropriate to make it possible to boot
    # from your HD again.  Note that /mnt/kernel may be flags-protected.
    chflags noschg /mnt/kernel
    cp /kernel /mnt/kernel
    cp /modules/* /mnt/modules/

    If you want to mount other partitions from your HD but have forgotten
    what they are, simply cat /mnt/etc/fstab after mounting the root

$DragonFly: src/nrelease/root/README,v 1.12 2004/04/22 16:53:17 cpressey Exp $