Moving a file system to a new Volume group (VG) when loglv does not exist.

Note: I wants to move u01Nlv logical volume from one volume group (oravg) to another (datavg) as shown below:

#lsvg -l oravg

oravg:

LV NAME             TYPE       LPs     PPs     PVs  LV STATE      MOUNT POINT

u01Nlv              jfs2       240     240     1    open/syncd    /u01

loglv02             jfs2log    1       1       1    open/syncd    N/A

#

#lsvg -l datavg

datavg:

LV NAME             TYPE       LPs     PPs     PVs  LV STATE      MOUNT POINT

#

Step 1 Close the source LV

# umount /u01

Step 2 Copy the source logical volume (LV) to the desired volume group (VG).

Syntax:

cplv -v VolumeGroup -y NewLogicalVolume SourceLogicalVolume

# cplv -v datavg -y u01lv u01Nlv

cplv: Logical volume dominolv successfully copied to u01lv.

#

Step 3 JFS and JFS2 file systems require a log device.

Verify that JFS or JFS2 log exist, if JFS or JFS2 log does not exist you have to create it. To make a new JFS2 log, enter 

# lsvg -l datavg

datavg:

LV NAME             TYPE       LPs     PPs     PVs  LV STATE      MOUNT POINT

u01lv               jfs2       120     120     1    closed/syncd  N/A

#

# mklv -t jfs2log datavg 1

loglv01

#

# lsvg -l datavg

datavg:

LV NAME             TYPE       LPs     PPs     PVs  LV STATE      MOUNT POINT

u01lv               jfs2       120     120     1    closed/syncd  N/A

loglv01             jfs2log    1       1       1    closed/syncd  N/A

#

Format the loglv01 logical volume once it has been create.

# logform /dev/loglv01

logform: destroy /dev/rloglv01 (y)?y

#

Step 4 change file system's lv and log device

# chfs -a dev=/dev/u01lv -a log=/dev/loglv01 /u01

Step 5 run fsck to ensure file system integrity & Mount the filesytem

#fsck -p /dev/u01lv

The current volume is: /dev/u01lv

Primary superblock is valid.

J2_LOGREDO:log redo processing for /dev/u01lv                      

Primary superblock is valid.

*** Phase 1 - Initial inode scan

*** Phase 2 - Process remaining directories

*** Phase 3 - Process remaining files

*** Phase 4 - Check and repair inode allocation map

*** Phase 5 - Check and repair block allocation map

File system is clean.

#

# mount /u01

Step 6 rmove the source logical volume

# rmlv u01Nlv

Moving a filesystem between volume groups (VG) – When loglv already exist.

Note: Moving a u01lv from datavg to Backupvg

# lsvg -l datavg

datavg:

LV NAME             TYPE       LPs     PPs     PVs  LV STATE      MOUNT POINT

loglv01             jfs2log    1       1       1    open/syncd     N/A

u01lv               jfs2       200     200     1    open/syncd     /u01

#

# lsvg -l Backupvg

testvg:

LV NAME             TYPE       LPs     PPs     PVs  LV STATE      MOUNT POINT

loglv03             jfs2log    1       1       1    open/syncd    N/A

mybackuplv          jfs2       80      80      1    open/syncd    /mybackup

#

Step 1- Close the source LV (umount filesystem)

# umount /u01

Step 2- Copy the source LV to another VG

# cplv -v testvg -y u01lvnew u01lv

cplv: Logical volume u01lv successfully copied to u01lvnew .

#

Verify

# lsvg -l testvg

testvg:

LV NAME             TYPE       LPs     PPs     PVs  LV STATE      MOUNT POINT

loglv03             jfs2log    1       1       1    open/syncd    N/A

mybackuplv          jfs2       80      80      1    open/syncd    /mybackup

u01lvnew            jfs2       400     400     1    closed/syncd  N/A

#

Step 3- Change filesystem's lv and log device on new vg.

Note: Loglv (loglv03) already exist on the destination VG (Backupvg).

# chfs -a dev=/dev/u01lvnew -a log=/dev/loglv03 /u01

**** Step 4 and 5 are Optional *******

Step 4- Remove old (source) LV.

# rmlv -f u01lv

Step 5- Change the LV name: newname_lv to oldname_lv

# chlv -n u01lv ulv01new

Step 6- Mount the filesystem

# mount /u01

Verify

# df -g

Filesystem    GB blocks      Free %Used    Iused %Iused Mounted on

/dev/hd4           1.75      1.43   19%     4180     2% /

/dev/hd2           3.12      1.12   65%    38689    13% /usr

/dev/hd9var        0.50      0.08   84%     2956    14% /var

/dev/hd3           4.00      3.98    1%      234     1% /tmp

/dev/hd1           3.12      2.36   25%      953     1% /home

/proc                 -         -    -         -     -  /proc

/dev/hd10opt       0.12      0.08   33%      997     5% /opt

/dev/mro_lv        4.00      3.98    1%        4     1% /mro

/dev/rootlv        7.00      4.63   34%      284     1% /root

/dev/backuplv     40.00     36.63    9%        7     1% /backup

/dev/u01lvnew     50.00     46.82    7%     1172     1% /u01

 #