원문 : http://www.ischo.net -- 조인상 //시스템 엔지니어

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미러된 rootvg를 alt_disk_install 로 복제하려고 하면 두가지 방법이 있다.

1. 미러해제후 alt_disk_install 수행.   다시 미러구성

2. mkszfile로 받은 image.data 를 편집후 alt_disk_install

2번의 경우에 해당하는 작업방법이다.

1. pv정보 확인

#lspv
hdisk0          00c262ee45d3effe                    rootvg          active
hdisk1          00c262eea89d29f3                    rootvg          active
hdisk2          00c262ee7f62e078                    None           

hdisk0과 hdisk1이 미러되어있는 상태.  hdisk2 로 복제할 예정 

2. image.data 생성 및 편집

#mkszfile
#ls -al

-rw-r--r--    1 root     system        10421 Apr 27 15:46 image.data

#vi image.data

lv_data:
        VOLUME_GROUP= rootvg
        LV_SOURCE_DISK_LIST= hdisk0 hdisk1                    ---> 여기서 hdisk1 삭제.  image.data에서 미러아닌것처럼 수정하는게 목표.
        LV_IDENTIFIER= 00c262ee00004c000000011d41dcd7fb.13
        LOGICAL_VOLUME= tslv
        VG_STAT= active/complete
        TYPE= jfs
        MAX_LPS= 512
        COPIES= 2         --> 1로 수정
        LPs= 2
        STALE_PPs= 0
        INTER_POLICY= minimum
        INTRA_POLICY= middle
        MOUNT_POINT=
        MIRROR_WRITE_CONSISTENCY= on/ACTIVE
        LV_SEPARATE_PV= yes
        PERMISSION= read/write
        LV_STATE= closed/syncd
        WRITE_VERIFY= off
        PP_SIZE= 64
        SCHED_POLICY= parallel
        PP= 4                  --> LPs 값과 동일하게 변경
        BB_POLICY= relocatable
        RELOCATABLE= yes
        UPPER_BOUND= 32
        LABEL=
        MAPFILE=
        LV_MIN_LPS= 2
        STRIPE_WIDTH=
        STRIPE_SIZE=
        SERIALIZE_IO= no
        FS_TAG=
        DEV_SUBTYP=

3. alt_disk_install 수행

#alt_disk_install -BC -i /image.data hdisk2

4. alt_disk 결과 확인

#lspv
hdisk0          00c262ee45d3effe                    rootvg          active
hdisk1          00c262eea89d29f3                    rootvg          active
hdisk2          00c262ee7f62e078                    altinst_rootvg 

* alt_disk name 변경하기

#alt_disk_install -v alt20110628 hdisk2     
#lspv
hdisk0          00c262ee45d3effe                    rootvg          active
hdisk1          00c262eea89d29f3                    rootvg          active
hdisk2          00c262ee7f62e078                    alt20110628 

(참고) Man page 에서 발췌한 mkszfile 의 목적

Purpose

       Saves the system state for reinstallation on the current system or another system.

The mkszfile command saves the system state for reinstallation on the current system or on another system.
       The information saved includes the following:
       *    System installation information
       *    Logical volume information for the root volume group
       *    File system information.