Mirroring rootvg for Virtual Server/PowerVM

Technote (troubleshooting)

Problem(Abstract)

This document describes how to mirror the rootvg in a Virtual Server/PowerVM environment. Mirrors all the logical volumes in rootvg except system dump device. You have to be padmin user to mirror rootvg .

Symptom

Rootvg is not mirrored on Virtual Server/PowerVM.

To check

$ lsvg -lv rootvg
rootvg:
LV NAME    TYPE      LPs  PPs  PVs LVSTATE      MOUNT POINT
hd5        boot       1    1    1 closed/syncd  N/A
hd6        paging     4    4    1 open/syncd    N/A
paging00   paging     8    8    1 open/syncd    N/A
hd8        jfs2log    1    1    1 open/syncd    N/A
hd4        jfs2       2    2    1 open/syncd    /
hd2        jfs2       33   33   1 open/syncd    /usr
hd9var     jfs2       5    5    1 open/syncd    /var
hd3        jfs2       18   18   1 open/syncd    /tmp
hd1        jfs2       80   80   1 open/syncd    /home
hd10opt    jfs2       17   17   1 open/syncd    /opt
lg_dumplv  sysdump    8    8    1 open/syncd    N/A

Environment

VIOS 1.4.1.2 FP9.2, 1.5.1 FP 10.1, 1.5.2.1 FP11.1

Resolving the problem

Man Page command structure

mirrorios [ -f][-defer] [ PhysicalVolume ...] 

-f (Runs the command without prompting you to continue.)
-defer ( Specifies that you do not want to receive a query about a system restart. The system should be restarted later.)
PhysicalVolume (Specifies the target physical volume name. The volume must already be a member of the volume group.)

#NOTE If you issue the mirrorios command without the -defer option the system will automatically reboot upon command completion. Using the -defer option will not reboot the VIOS untill user reboots system. Note -defer option is only available for 1.4 or higher versions of VIOS.

To mirror the rootvg
$ extendvg rootvg hdisk#
$ mirrorios hdisk#
To mirror the rootvg with deferred reboot
$ extendvg rootvg hdisk#
$ mirrorios -defer hdisk#
After Mirroring Rootvg
$ lsvg -lv rootvg
rootvg:
LV NAME   TYPE    LPs  PPs  PVs LV STATE     MOUNT POINT
hd5       boot    1    2    2   closed/syncd N/A
hd6       paging  4    8    2   open/syncd   N/A
paging00  paging  8    16   2   open/syncd   N/A
hd8       jfs2log 1    2    2   open/syncd   N/A
hd4       jfs2    2    4    2   open/syncd   /
hd2       jfs2    33   66   2   open/syncd   /usr
hd9var    jfs2    5    10   2   open/syncd   /var
hd3       jfs2    18   36   2   open/syncd   /tmp
hd1       jfs2    80   160  2   open/syncd   /home
hd10opt   jfs2    17   34   2   open/syncd   /opt
lg_dumplv sysdump 8    8    1   open/syncd   N/A

After rootvg has been mirrored check bootlist to make sure both disk are included

$ bootlist -mode normal -ls

hdisk0 blv=hd5
hdisk1 blv=hd5
If mirrored rootvg disk are not specified in bootlist run command below

$ bootlist -mode normal hdisk0 hdisk1