Replacing a failing root disks

[Anthony_93]

Could someone please help.. this is my situation. I have a root disks in vg00 with the following filesystems:

/
/stand
/var
/usr
/opt
/home/tmp

The disk is getting some disks errors during a patch install that requires to re-build the kernel. A new 4.3gb has been installed into the system and would like to know who I should configure this new disks to replace the existing root disks. I wanted to create another volume group ie. vg01 and build the new disk as a root disk. Then export and import the data from the old to the new. Remove the old disks. Any help on the procedures would be appreciated. thxs..

[Leif Halvarsson_2]

Hi,
Check the man page for lvlnboot. There you fing a step by step description how to create a bootable LVM disk.

[Pete Randall]

You could also use Ignite to create a make_tape_recovery backup tape, which you could then use to restore your existing system onto the new drive. Ignite is available here:

http://www.software.hp.com/products/IUX/index.html


Pete

[RAC_1]

If your boot disk has problems, you will have problems creating a mirror of root disk. Do you have a ignite_recoverytape prepared for this server?

You can try creating a mirror of root disk. (You need to have mirror disk software installed.) IF that does not work you can try to create a static copy of root disk and boot through it. If it succeeds, you can try getting your data from old disk.

[Steven E. Protter]

If it still works:

make_tape_recovery

shut system.

switch the disk

boot off the tape

interupt boot at console 10 second prompt

sea

bo p2 if the sequential or tape device is p2

N Don't interact

Your system will load.

If you have an extra drive slot you can use mirror/ux

lvextend -m 1 /dev/vg00/rlvol3 /dev/dsk/c#t#d#

All database apps must be shut during make_tape_recovery if you intend to migrate them this way.

SEP

[Sundar_7]

OK, let us try something new (atleast for me) and see if that works :-)

1) Attach the new disk

2)

# pvcreate -B /dev/rdsk/c0t1d0

# mkboot -a "hpux" /dev/dsk/c0t1d0

# mknod /dev/vgroot c 64 0x010000

# vgcreate /dev/vgroot /dev/dsk/c0t1d0

# lvcreate -L 150 -r n -C y /dev/vgroot # Stand volume

# lvcreate -L 1024 -r n -C y /dev/vgroot # Swap

# lvcreate -L 500 -r n -C y /dev/vgroot #

- Create other logical volumes

# newfs -F hfs /dev/vgroot/lvol1

# newfs -F vxfs /dev/vgroot/lvol3

- Create other file systems

# /usr/sbin/shutdown -r -y 0

Interrupt in ISL and boot in maint mode

ISL> hpux -lm

# vgchange -a y /dev/vg00

# vgchange -a y /dev/vgroot

# mount -a

- Mount the /dev/vgroot/lvols in a temp
directory and copy the contents over

# lvrmboot -r /dev/vg00/lvol3 /dev/vg00
# lvrmboot -s /dev/vg00/lvol2 /dev/vg00
# lvrmboot -d /dev/vg00/lvol2 /dev/vg00
# lvrmboot -b /dev/vg00/lvol1 /dev/vg00

# lvlnboot -r /dev/vgroot/lvol3 /dev/vgroot
# lvlnboot -s /dev/vgroot/lvol2 /dev/vgroot
# lvlnboot -d /dev/vgroot/lvol2 /dev/vgroot
# lvlnboot -b /dev/vgroot/lvol1 /dev/vgroot

# lvlnboot -R

# vgchange -a n /dev/vg00

# vgchange -a n /dev/vgroot

# edit /etc/fstab

# reboot

interrupt BCH and boot using the new disk

BCH> bo newdisk

-- Tell me is this works.

I havent really tried this anytime. So this is just my guess work..

Sundar.