Unmount all the file systems from the volume group

# umount /mount_point

Disable the volume group

# vgchange -a n /dev/vgName

Export a volume group whilst creating a map file and extracting VGID off the disks.

#vgexport -s -v -m /tmp/vgName.map vgName (-m Create map file, -v in verbose mode, -s vgid)

Recreate the volume group as described here.

NOTE: Since you have the VGID information in the map file you can skip some of the steps and proceed to the necessary step as decribed here

Import the volume group

# vgimport -s -v -m /tmp/vgName.map vgName

Activate the newly created volume group.

# vgchange -a y /dev/vgName

Assuming you have not touched /etc/fstab file, you can just run -

# mount -a (”mount -a” to mount all or use “mountall” or use individual mount point)

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Below is the e.g on HP-UX OS

# export UNIX95

# UNIX95= ps -efH | more

root      2145 1  0  Jun 28  ?           00:00   /usr/sbin/nfsd 16
root      2151  2145  0  Jun 28  ?           00:00     /usr/sbin/nfsd 16
root      2159  2145  0  Jun 28  ?           00:00     /usr/sbin/nfsd 16
root      2154  2145  0  Jun 28  ?           00:00     /usr/sbin/nfsd 16
root      2160  2145  0  Jun 28  ?           00:00     /usr/sbin/nfsd 16
root      2167  2145  0  Jun 28  ?           00:00     /usr/sbin/nfsd 16
root      2163  2145  0  Jun 28  ?           00:00     /usr/sbin/nfsd 16
root      2171  2145  0  Jun 28  ?           00:00     /usr/sbin/nfsd 16
root      2146 2145  0  Jun 28  ?           00:00     /usr/sbin/nfsd 16
root      2168  2146  0  Jun 28  ?           00:00       /usr/sbin/nfsd 16
root      2152  2146  0  Jun 28  ?           00:00       /usr/sbin/nfsd 16
root      2147  2146  0  Jun 28  ?           00:00       /usr/sbin/nfsd 16
root      2155  2146  0  Jun 28  ?           00:00       /usr/sbin/nfsd 16
root      2161  2146  0  Jun 28  ?           00:00       /usr/sbin/nfsd 16
root      2164  2146  0  Jun 28  ?           00:00       /usr/sbin/nfsd 16
root      2172  2146  0  Jun 28  ?           00:00       /usr/sbin/nfsd 16

The second column has parent process ID and the third column has the child process ID.

Below are some more example using UNIX95.

# UNIX95= ps -e -o “user,vsz,pid,ppid,arg” | sort -rnk2 | more

# UNIX95= ps -e -o vsz=Kbytes -o pid,args=Command-Line | sort -rnk1

# UNIX95= ps -e -o vsz=Kbytes -o ruser -o pid,args=Command-Line | sort -rkn1

To see some interesting output, you can try these -

# ps -el|sort -n +9 -10|

# ps -fp PID

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Assuming you have finished creating a new logical volume and you now want to create a new file system and mount the file system on to the directory.

# newfs -F vxfs -o largefiles /dev/vgName/rlvName

Note :

1) you don’t have to define “-F vxfs”, by default the file sytem type will be automaticallty picked from /etc/default/* directory.

2) you will to define “-o largefiles” if the file system is used for largefiles, this is typically used for database related file systems, otherwise you can ignore this option.

Now mount the file system

# mount /dev/vgName/lvName /mount_point

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