How to
mirror the root disk
The following procedure shows how to mirror the
root disk. Let c10t1d0 be the existing
primary disk and c2t10d0 the new mirror
boot disk:
For LVM
Use idisk(1M) command to partition the disk
according to this file:
# idisk -wf
/tmp/partitionfile /dev/rdsk/c2t10d0
idisk version:
1.2
**********************
WARNING ***********************
If you continue
you may destroy all data on this disk.
Do you wish to
continue(yes/no)? yes
...
1) Setup the
disk partitions
At a cold-installed UX 11.23 system the partition
sizes are different compared to UX 11.22. Use diskinfo(1M) to check the
partition sizes. E.g. for a UX 11.23 system you would get:
# diskinfo
/dev/rdsk/c10t1d0s1 | grep size
size: 512000
Kbytes
# diskinfo
/dev/rdsk/c10t1d0s3 | grep size
size: 409600
Kbytes
Create a partition description file:
2) Create the
new device files for the new partitions (c2t10d0s1,s2, (s3))
# insf -e
-Cdisk
3) Use efi_fsinit(1M) to initialize the FAT
filesystem on the EFI partition:
# efi_fsinit -d
/dev/rdsk/c2t10d0s1
NOTE: This step is not neccessary if it can be
guaranteed that the mirror disk does not contain a valid EFI filesystem. In
this case efi_fsinit(1M) will be done automatically by the subsequent
mkboot(1M) command. But if you take e.g. an old UX 11.22 boot disk as mirror
disk, mkboot will not automatically run efi_fsinit. As a result only 100MB of
the 500MB EFI partition (s1) can be used.
4) Use mkboot(1M) to format the EFI partition
(s1) and populate it with the EFI files below /usr/lib/efi/ and to format the LIF
volume (part ofs2) and populate it with the LIF files (ISL, AUTO, HPUX, LABEL)
below /usr/lib/uxbootlf:
# mkboot -e -l
/dev/rdsk/c2t10d0
# efi_ls -d
/dev/rdsk/c2t10d0s1 (to check EFI)
|
UX 11.22
|
UX 11.23 (cold-installed)
|
|
# vi /tmp/partitionfile
2
EFI 100MB
HPUX 100%
|
# vi /tmp/partitionfile
3
EFI 500MB
HPUX 100%
HPSP 400MB
|
FileName Last Modified Size
EFI/ 11/ 5/2003 0
STARTUP.NSH 11/ 5/2003 296
total space 523251712
bytes, free space 520073216 bytes
# lifls -l /dev/rdsk/c2t10d0s2
(to check LIF)
5) Check the content of AUTO file on EFI partition:
# efi_cp -d /dev/rdsk/c2t10d0s1 -u /EFI/HPUX/AUTO
/tmp/x; cat /tmp/x
NOTE: Specify
the -lq option if prefer that your system boots up without interruption in case
of a disk failure:
# mkboot -a "boot
vmunix -lq" /dev/rdsk/c2t10d0
# mkboot -a "boot
vmunix -lq" /dev/rdsk/c10t1d0
6) Copy the HP service partition (UX 11.23 only):
(skip this, if you don’t have a service partition)
# dd if=/dev/rdsk/c10t1d0s3
of=/dev/rdsk/c2t10d0s3 bs=1024k
7) Initialize the LVM partition (s2) and add it to
vg00:
# pvcreate [-f] –B
/dev/rdsk/c2t10d0s2 (take care to uses2)
# vgextend vg00 /dev/dsk/c2t10d0s2
8) Mirror the LVs to thes2 partition:
# for i in lvol1 lvol2 ...
lvol8 (specify each LV)
> do lvextend -m 1
/dev/vg00/$i /dev/dsk/c2t10d0s2
> done
9) Check if content of LABEL file (i.e. root, boot,
swap and dump device definition) has been initialized (done by lvextend) on the
mirror disk:
# lvlnboot -v Boot
Definitions for Volume Group /dev/vg00:
Physical Volumes belonging
in Root Volume Group:
/dev/dsk/c10t1d0s2
(0/1/1/1.2.0) -- Boot Disk
/dev/dsk/c2t10d0s2 (0/1/1/0.1.0)
-- Boot Disk
Boot: lvol1 on: /dev/dsk/c10t1d0s2
/dev/dsk/c2t10d0s2
Root: lvol3 on: /dev/dsk/c10t1d0s2
/dev/dsk/c2t10d0s2
Swap: lvol2 on: /dev/dsk/c10t1d0s2
/dev/dsk/c2t10d0s2
Dump: lvol2 on: /dev/dsk/c10t1d0s2,
0
If not, then set it:
# lvlnboot -r /dev/vg00/lvol3
# lvlnboot -b
/dev/vg00/lvol1
# lvlnboot -s
/dev/vg00/lvol2
# lvlnboot -d /dev/vg00/lvol2
8) Add a line to /stand/bootconf for the new boot
disk (the letter l is for LVM)
# vi /stand/bootconf l
/dev/dsk/c2t10d0s2
l /dev/dsk/c10t1d0s2
NOTE: This is not neccessary to be able to boot from the
mirror in the first place. But if you omit it then you will run into trouble
when installing an EFI boot loader patch (e.g. PHKL_34088). This patch updates
the hpux.efi boot loader on all disks listed in the bootconf file.
9) Specify the mirrored disk as alternate bootpath
# setboot –a <HW path of
mirror> # setboot –h <HW path of mirror> (for UX 11.23 use the HA alternate) # setboot (to check it)
