SUMMARY: Creating bare-metal recovery disks
From: Dr. Hans Ekkehard Plesser (hans.ekkehard.plesser_at_nlh.no)
Date: 02/23/04
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Date: Mon, 23 Feb 2004 14:54:52 +0100 To: tru64-unix-managers@ornl.gov
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Hi!
Thanks to John Lanier, Bob Marcan, Isaac Chute, and Michael Polnick.
I received several suggestions:
A. Isaac Chute of HP says that HP is working on better documentation of
and tools for creating backup disks.
B. Bob Marcan recommends to install the system partitions on RAID 1 disks
(mirroring), synchronize the disks, and then remove one disk of the pair
to save storage.
C. Michael Polnick provided the following recipe:
1. disklabel it:
# disklabel -wr -t advfs dsk14
2. make file domains:
# mkfdmn -r /dev/disk/dsk14a root_backup
# mkfset root_backup root
# mkfdmn /dev/disk/dsk14g usr_backup
# mkfset usr_backup usr
# mkfset usr_backup var
3. Copy system disk
# mount root_backup#root /mnt
# vdump 0f - / | vrestore -xf - -D /mnt
also for /usr and /var
4. make disk bootable
change file domains in /mnt/etc/fstab to
root_backup#root / advfs rw 0 1
usr_backup#usr /usr advfs rw 0 2
usr_backup#var /var advfs rw 0 2
5. make swap
# disklabel -s /dev/rdisk/dsk14b swap
edit /mnt/etc/sysconfigtab
vm:
swapdevice = /dev/disk/dsk14b
D. John Lanier provided the following, very detailed instructions:
<<<begin procedure>>>
HowTo: How to make a bootable copy of your boot disk.
OPERATING SYSTEM OR PRODUCT NAME : Compaq Tru64 UNIX
VERSION : 4.x and 5.x
DESCRIPTION OF TASK OR ACTIVITY : How to create another bootable disk.
HOWTO PERFORM THE DESIRED TASK OR ACTIVITY :
1.)
To create an ADVFS root and /usr partition, you first need to
create the disklabel.
4.x
===
Assuming that your new disk is "disk: rz28d" (top of "disklabel -r rz1"
output)
and is the rz1 disk:
disklabel -wr -t advfs rz1 rz28d
mkfdmn -r /dev/rz1a root2_domain
mkfset root2_domain root
mkfdmn /dev/rz1g usr2_domain
mkfset usr2_domain usr
5.x
===
Assuming that your new disk is "disk: BB00921B91" (top of "disklabel -r
dsk1" output)
and is the "dsk1" disk:
disklabel -wr -t advfs dsk1 BB00921B91
mkfdmn -r /dev/disk/dsk1a root2_domain
mkfset root2_domain root
mkfdmn /dev/disk/dsk1g usr2_domain
mkfset usr2_domain usr
Next you are going to need to make the following mount points:
mkdir /root2
mkdir /rootclone
mkdir /usr2
mkdir /usrclone
If you have the Advanced Utilities for ADVFS you can do the following:
clonefset root_domain root rootclone
clonefset usr_domain usr usrclone
mount root_domain#rootclone /rootclone
mount root2_domain#root /root2
mount usr_domain#usrclone /usrclone
mount usr2_domain#usr /usr2
vdump -0 -f - -D /rootclone |vrestore -xf - -D /root2
vdump -0 -f - -D /usrclone |vrestore -xf - -D /usr2
umount /rootclone
umount /usrclone
rmfset root_domain rootclone
rmfset usr_domain usrclone
If you do not have the Advanced Utilities for ADVFS, do the following:
shutdown now
mount -u /
mount /usr
mount root2_domain#root /root2
mount usr2_domain#usr /usr2
vdump -0 -f - -D / |vrestore -xf - -D /root2
vdump -0 -f - -D /usr |vrestore -xf - -D /usr2
2:) To create UFS Root and /usr Partitions
4.x:
====
Assuming that your new disk is an rz28d and is the rz1 disk
disklabel -wr -t ufs rz1 rz28d
newfs /dev/rz1a
newfs /dev/rz1g
mkdir /root2
mkdir /usr2
shutdown now
mount -u /
mount /dev/rz1a /root2
mount /usr
mount /dev/rz1g /usr2
vdump -0 -f - -D / |vrestore -xf - -D /root2
vdump -0 -f - -D /usr |vrestore -xf - -D /usr2
***
By default, "root" is partition "a" of the disk, "swap" is partition
"b" of the disk,
and "usr" is partition "g" of the disk. Sometimes the "h" partition
is reserved for var;
you can confirm this from "disklabel -r" output)
***
5.x:
====
Assuming that your new disk is a BB00921B91 and is the "dsk1" disk
disklabel -wr -t ufs dsk1 BB00921B91
newfs /dev/dsk1a
newfs /dev/dsk1g
mkdir /root2
mkdir /usr2
shutdown now
mount -u /
mount /dev/disk/dsk1a /root2
mount /usr
mount /dev/disk/dsk1g /usr2
vdump -0 -f - -D / |vrestore -xf - -D /root2
vdump -0 -f - -D /usr |vrestore -xf - -D /usr2
***
By default, "root" is partition "a" of the disk, "swap" is partition
"b" of the disk,
and "usr" is partition "g" of the disk. Sometimes the "h" partition
is reserved for var;
you can confirm this from "disklabel -r" output)
***
Some important changes to make to the new root disk:
4.x:
====
mount root2_domain#root /root2
1. In the /root2/etc/fstab file change your swap space to the new disk.
change /dev/rz0b swap1 ufs sw 0 2
to /dev/rz1b swap1 ufs sw 0 2
2. In /root2/sbin directory may be a file called swapdefault. If this
file
exists it is a link to your swapspace. You will want to relink this
to
the correct disk.
ln -s /dev/rz1b
3. If ufs file systems, change the /root2/etc/fstab file to reflect the
new
location of the root, and usr partions.
Change for example /dev/rz0a / ufs rw 1 1
to read /dev/rz1a / ufs rw 1 1
4. For advfs you will need to change the links in /root2/etc/fdmns.
root_domain and usr_domain links should point to the new boot disk.
cd /root2/etc/fdmns/root_domain
rm rz0a
ln -s /dev/rz1a rz1a
cd ../usr_domain
rm rz0g
ln -s /dev/rz1g rz1g
5.x:
====
mount root2_domain#root /root2
1. You do NOT have to edit the /root2/etc/fstab file in this procedure
to change your
swap space to the new disk.
2. In 5.x, the swap device is included in the "vm" subsystem:
EX:
- -->sysconfig -q vm swapdevice
vm:
swapdevice = /dev/disk/dsk0b
You can edit the /etc/sysconfigtab file to reflect the new swap device:
cd /root2
vi /etc/sysconfigtab (or your editor of choice)
<cut>
vm:
swapdevice = /dev/disk/dsk0b <---This is what you need to change
to
<---"/dev/disk/dsk1b"..
<cut>
:wq
3. If ufs file systems, change the /root2/etc/fstab file to reflect the
new
location of the root and usr partions.
Change, for example: /dev/disk/dsk0a / ufs
rw 1 1
To read: /dev/disk/dsk1a / ufs rw
1 1
(Do the same for "/dev/disk/dsk1g")
***
By default, "root" is partition "a" of the disk, "swap" is partition
"b" of the disk,
and "usr" is partition "g" of the disk. Sometimes the "h" partition
is reserved for var;
you can confirm this from "disklabel -r" output)
***
4. For advfs you will need to change the links in /root2/etc/fdmns.
root_domain and usr_domain links should point to the new boot disk.
cd /root2/etc/fdmns/root_domain
rm dsk0a
ln -s /dev/disk/dsk1a dsk1a
cd /root2/etc/fdmns/usr_domain
rm dsk0g
ln -s /dev/disk/dsk1g dsk1g
If you are using another combination such as root = ufs, usr = advfs
then you should do the commands above that apply to your system.
Once complete, you should be able to boot the new disk from the
console prompt.
<<<end procedure>>>
- --
Dr. Hans Ekkehard Plesser
Associate Professor
Department of Mathematical Sciences and Technology
Agricultural University of Norway
Phone +47 6494 8832
Fax +47 6494 8810
Home http://arken.nlh.no/~imfhep
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- Previous message: Derek Gatherer: "SUMMARY: swapon and memory"
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