MIRRORING ROOT VOLUME in HP-UX

MIRRORING THE ROOT VOLUME 

1. First create a bootable logical volume disk. 

2. Mirror the root logical volume to new disk: 
#lvextend –m 1 /dev/vg00/lvol1 /dev/dsk/c0t1d0 

3. Mirror the Primary Swap area: 
Lvextend –m 1 /dev/vg00/prswaplv /dev/dsk/c0t1d0 

4. Verify the LVM was updated: 
#lvlnboot –v 

BREAKING A MIRROR FOR BACKUP PURPOSES 

Mirrors are created and broken from an lvol level. Remember this. If you want to break the mirror for /dev/vg00/lvol1 which may be mounted at / do the following: 

#lvsplit /dev/vg00/lvol1      
This will by default create a
new, unmounted lvol called lvol1b. You could also do the following: 

#lvsplit –s backup /dev/vg00/lvol1    
This does the same, but names it lvol1backup  
Mount the new lvol to what ever you want, and back it up. 

REMIRRORING AFTER BACKUP 

After you are finished, you must remirror and sync with existing and new data created on The active mirror.  Use this command (using the lvol1b from example above): 
#lvmerge /dev/vg00/lvolb /dev/vg00/lvol1 

REMOVING A MIRROR (SO YOU CAN PULL A DRIVE) 

1. You must first remove the association between each lvol associated with the drive. Use the following command to view the current mirrored lvol’s: 
#lvlnboot –v 

2. Break the mirror and remove the pv/lvol association for each lvol. 
This example removes PV /dev/dsk/c1t0d0 from /dev/vg00/lvol2, and lvol3. Assuming that there was only 1 other disk in the mirror set: 

#lvreduce –m 0 /dev/vg00/lvol2 /dev/dsk/c1t0d0
#lvreduce –m 0 /dev/vg00/lvol3 /dev/dsk/c1t0d0 

EXTENDING EXISTING FILE SYSTEMS ONLINE IN HP-UX

EXTENDING ONLINE JFS FILESYSTEMS
If you want to extend /usr from 300MB to 600MB, and there is available space, do the following:
              
1. Determine lvol # of /usr. Type: 

#bdf

Make note of the lvol that is mounted to /usr.
2. Increase lvol6 to 600MB:  
/sbin/lvextend -L 600 /dev/vg00/lvol6 (-L is new size in MB)


3. Extend the file system using OnlineJFS:         
#/sbin/fsadm –F vxfs –b 600m /usr (m is for MB)


In this example you want to extend /usr from 300MB to 600MB but there is no available space in the volume group that the /usr filesystem is on. In this case you would 
extend the volume group, then the logical volume, and finally the filesystem.

1. If adding disk online (disk array), create device files:   
#insf –e   (verify  #ioscan –fnC disk) 


2. Prepare disks for Logical Volume Manager (LVM) structures:    
#pvcreate /dev/rdsk/???


3. Make space available for volgroup:     
#vgextend /dev/vg00 /dev/dsk/c?d?s?


4. Increase lvol6 to 600MB:  
/sbin/lvextend -L 600 /dev/vg00/lvol6 (-L is new size in MB)


5. Extend the file system using OnlineJFS:         
#/sbin/fsadm –F vxfs –b 600m  /usr  (m is for MB)

EXTENDING EXISTING FILE SYSTEMS (If Non ONLINE JFS)

If you want to extend /usr from 300MB to 600MB, and there is available space, do the following:

  a. Determine lvol # of /usr. Type:

#bdf

Make note of the lvol that is mounted to /usr. 

b. Unmount the file system.
    
#umount /usr      

If you run into problems you may have to boot into single user mode, or you may need to kill all processes associated with /usr.

#fuser –k /usr

c. Increase lvol6 to 600MB: 

#/sbin/lvextend -L 600 /dev/vg00/lvol6

d. Resize the file system to size of lvol6          

#/sbin/extendfs /dev/vg00/rlvol6

e. Now mount the file system:           

#/sbin/mount /dev/vg00/lvol6 /usr

f. Make sure changes took effect using bdf.

g. If you are in single user mode, type the following to get to run-level 3:

#init 3

         

CREATING A BOOT DISK – ROOT VOLUME in HP-UX SERVER

CREATING A BOOT DISK – ROOT VOLUME in HP-UX SERVER 


1. First create a bootable logical volume disk. 
#pvcreate –B /dev/rdsk/c0t1d0  


2. Add the PV to vg00. 
#vgextend /dev/vg00 /dev/dsk/c0t1d0
 
3. Place Boot Utilities on disk:   
#mkboot /dev/rdsk/c0t1d0 


4. Add the AUTO File to the LIF area:  
#mkboot –a “hpux –lq (;0)/stand/vmunix” /dev/rdsk/devicefile 

HP-UX - MIRRORING ROOT VOLUME

MIRRORING THE ROOT VOLUME 


1. First create a bootable logical volume disk. 



2. Mirror the root logical volume to new disk: 
#lvextend –m 1 /dev/vg00/lvol1 /dev/dsk/c0t1d0 


3. Mirror the Primary Swap area: 
Lvextend –m 1 /dev/vg00/prswaplv /dev/dsk/c0t1d0 


4. Verify the LVM was updated: 
#lvlnboot –v 


BREAKING A MIRROR FOR BACKUP PURPOSES 


Mirrors are created and broken from an lvol level. Remember this. If you want to break the mirror for /dev/vg00/lvol1 which may be mounted at / do the following: 


#lvsplit /dev/vg00/lvol1      
This will by default create a
new, unmounted lvol called lvol1b. You could also do the following: 


#lvsplit –s backup /dev/vg00/lvol1    
This does the same, but names it lvol1backup  
Mount the new lvol to what ever you want, and back it up. 


REMIRRORING AFTER BACKUP 

After you are finished, you must remirror and sync with existing and new data created on The active mirror.  Use this command (using the lvol1b from example above): 
#lvmerge /dev/vg00/lvolb /dev/vg00/lvol1 


REMOVING A MIRROR (SO YOU CAN PULL A DRIVE) 


1. You must first remove the association between each lvol associated with the drive. Use the following command to view the current mirrored lvol’s: 
#lvlnboot –v 


2. Break the mirror and remove the pv/lvol association for each lvol. 
This example removes PV /dev/dsk/c1t0d0 from /dev/vg00/lvol2, and lvol3. Assuming that there was only 1 other disk in the mirror set: 


#lvreduce –m 0 /dev/vg00/lvol2 /dev/dsk/c1t0d0
#lvreduce –m 0 /dev/vg00/lvol3 /dev/dsk/c1t0d0