pvmove

[enrico.nic]

hi All,

I wonder to enlarge the "/" partition (on /dev/vg00/lvol3) on an inactive image of the system disk, bringing it from the actual 800 Mb to (at least) 1 Gb. But this partition should reside on contiguous blocks. I should probably use "pvmove" to move the actual /dev/vg00/lvol4 partition at the end (or at least in the first free blocks found) of the disk, and then enlarge the "/" partition on the newly acquired free blocks.

But I don't know how to do that ... can anybody please help me ?

That's the situation of the (unmounted) disk.

# vgdisplay -v /dev/drd00
--- Volume groups ---
VG Name                     /dev/drd00
VG Write Access             read/write    
VG Status                   available                
Max LV                      255   
Cur LV                      8     
Open LV                     8     
Max PV                      16    
Cur PV                      1     
Act PV                      1     
Max PE per PV               4384        
VGDA                        2  
PE Size (Mbytes)            32             
Total PE                    4374   
Alloc PE                    1642   
Free PE                     2732   
Total PVG                   0       
Total Spare PVs             0             
Total Spare PVs in use      0                    

   --- Logical volumes ---
   LV Name                     /dev/drd00/lvol1
   LV Status                   available/syncd          
   LV Size (Mbytes)            2048           
   Current LE                  64       
   Allocated PE                64         
   Used PV                     1      

   LV Name                     /dev/drd00/lvol3
   LV Status                   available/syncd          
   LV Size (Mbytes)            800            
   Current LE                  25       
   Allocated PE                25         
   Used PV                     1      

   LV Name                     /dev/drd00/lvol4
   LV Status                   available/syncd          
   LV Size (Mbytes)            12256          
   Current LE                  383      
   Allocated PE                383        
   Used PV                     1      

   LV Name                     /dev/drd00/lvol5
   LV Status                   available/syncd          
   LV Size (Mbytes)            12000          
   Current LE                  375      
   Allocated PE                375        
   Used PV                     1      

   LV Name                     /dev/drd00/lvol6
   LV Status                   available/syncd          
   LV Size (Mbytes)            1024           
   Current LE                  32       
   Allocated PE                32         
   Used PV                     1      

   LV Name                     /dev/drd00/lvol7
   LV Status                   available/syncd          
   LV Size (Mbytes)            5152           
   Current LE                  161      
   Allocated PE                161        
   Used PV                     1      

   LV Name                     /dev/drd00/lvol8
   LV Status                   available/syncd          
   LV Size (Mbytes)            9024           
   Current LE                  282      
   Allocated PE                282        
   Used PV                     1      

   LV Name                     /dev/drd00/swap
   LV Status                   available/syncd          
   LV Size (Mbytes)            10240          
   Current LE                  320      
   Allocated PE                320        
   Used PV                     1      

   --- Physical volumes ---
   PV Name                     /dev/dsk/c3t2d0
   PV Status                   available               
   Total PE                    4374   
   Free PE                     2732   
   Autoswitch                  On       
   Proactive Polling           On 

Thank you in advance

Enrico

[Torsten.]

Never done this so far, but this could probably work:

# pvmove -p -n /dev/vg00/lvol4 /dev/dsk/c3t2d0 /dev/dsk/c3t2d0

[enrico.nic]

Sorry, I forgot to specify I'm at 11.23 release. At 11v3 there are other (useful) options of "pvmove", like the exact specifications of the disk sectors implied in the physical move.

Thank you Torsten, I will try lately your suggestion.

Enrico

[Torsten.]

How about this:
mirror lvol4, then remove the original

[Ralf_S]

Hi,

I, too, wouls suppose mirroring lvol4 or creatin a new one, copying it and - after it is sure, that the copy works, delete the original.

Another way might be to move some content of the present lvol3 to a new filesystem, that is not restricted by anc continous tag and that contains data, that needs not to be available at system boot. May be your /tmp or var directories are right now part of the / fielsystem. You could create seperate filesystems for those directories.

Bye

Ralf

[enrico.nic]

I'm afraid but it seems that pvmove does not work on the same disk.

# pvmove -n /dev/vg00/lvol4 /dev/dsk/c3t2d0 /dev/dsk/c3t2d0
Usage: pvmove
        [-A Autobackup]
        [-n LogicalVolumeName] 
        SourcePhysicalVolumePath [ DestinationPhysicalVolumePath... | DestinationPhysicalVolumeGroupName... ]
        or
        pvmove [-A Autobackup] SourcePhysicalVolumePath[:0] [ DestinationPhysicalVolumePath... | DestinationPhysicalVolumeGroupName... ]
"SourcePhysicalVolumePath": The source physical volume is also in the set of
destination physical volume(s).

Enrico

[enrico.nic · Accepted solution]

Hi,

Finally did.

What I've done:

1) boot from the DRD image (created with the Dynamic Root Disk utility)

2) create a new partition on the "new", actual system disk: /dev/vg00/lvol9 mounted on /home_new

3) cd / , cp -rp home home_new

4) unmount /home (/dev/vg00/lvol4)

5) destroy /dev/vg00/lvol4

6) unmount /home_new, edit /etc/fstab to mount /dev/vg00/lvol9 on /home

7) reboot from the "old" system disk

8) extend /dev/drd00/lvol3 (lvextend -L 1536 /dev/drd00/lvol3) -> now it works !

9) extendfs -F vxfs /dev/drd00/lvol3

10) lvlnboot -r lvol3 /dev/drd00

11) reboot from the "new" system disk

Now the "/" partition has been enlarged enough to perform the system upgrade.

Thank you all for your time

Enrico