Expand LUN on Solaris

After expanding a volume on the SAN, I needed Solaris 10 to now see that the disk has grown and make use of the added space.

Device slice c8t600A0B80002A39FC000004DE47E92C69d0 was 200G with
a filesystem on slice 6. On the SAN, I expanded the volume to 225G. Here is how to expand the disk or partition inside of Solaris.

The steps are:

1. Detect larger disk size and relabel disk.
2. Grow the filesystem to fill the disk.

Auto detect the disk size

Run format, select the disk, and set the type to 'auto'.
Any filesystems on the disk must be unmounted first, and commented out in /etc/vfstab.

[root@host oradata]# format
Searching for disks...done

AVAILABLE DISK SELECTIONS:
...
       3. c8t600A0B80002A39FC000004DE47E92C69d0   6140_22P
          /scsi_vhci/ssd@g600a0b80002a39fc000004de47e92c69    
...
Specify disk (enter its number)[2]: 3                                                                          
selecting c8t600A0B80002A39FC000004DE47E92C69d0: 6140_22P                                                      
[disk formatted]                                                                                               
format> verify                                                                                                 

Primary label contents:

Volume name = <6140_22P>
ascii name  = 
pcyl        = 51200                                            
ncyl        = 51198                                            
acyl        =    2                                             
nhead       =  128                                             
nsect       =   64                                             
Part      Tag    Flag     Cylinders         Size            Blocks
  0       root    wm       0 -    31      128.00MB    (32/0/0)       262144
  1       swap    wu      32 -    63      128.00MB    (32/0/0)       262144
  2     backup    wu       0 - 51197      199.99GB    (51198/0/0) 419414016
  3 unassigned    wm       0                0         (0/0/0)             0
  4 unassigned    wm       0                0         (0/0/0)             0
  5 unassigned    wm       0                0         (0/0/0)             0
  6        usr    wm      64 - 51197      199.74GB    (51134/0/0) 418889728
  7 unassigned    wm       0                0         (0/0/0)             0

format> type

AVAILABLE DRIVE TYPES:
        0. Auto configure
...
Specify disk type (enter its number)[24]: 0
c8t600A0B80002A39FC000004DE47E92C69d0: configured with capacity of 224.99GB

selecting c8t600A0B80002A39FC000004DE47E92C69d0
[disk formatted]

OK, that worked. Now the label needs to be updated. Take a peek first.

format> verify
Warning: Primary label on disk appears to be different from
current label.
Warning: Could not read backup labels.

Warning: Check the current partitioning and 'label' the disk or use the
         'backup' command.

Primary label contents:

Volume name = <6140_22P>
ascii name  = 
pcyl        = 51200
ncyl        = 51198
acyl        =    2
nhead       =  128
nsect       =   64
Part      Tag    Flag     Cylinders         Size            Blocks
  0       root    wm       0 -    31      128.00MB    (32/0/0)       262144
  1       swap    wu      32 -    63      128.00MB    (32/0/0)       262144
  2     backup    wu       0 - 51197      199.99GB    (51198/0/0) 419414016
  3 unassigned    wm       0                0         (0/0/0)             0
  4 unassigned    wm       0                0         (0/0/0)             0
  5 unassigned    wm       0                0         (0/0/0)             0
  6        usr    wm      64 - 51197      199.74GB    (51134/0/0) 418889728
  7 unassigned    wm       0                0         (0/0/0)             0
format> label
Ready to label disk, continue? yes

Now that it is updated, notice that the volume name has been blanked out. Add that back.

format> verify

Primary label contents:

Volume name = <        >
ascii name  = 
pcyl        = 57600
ncyl        = 57598
acyl        =    2
nhead       =  128
nsect       =   64
Part      Tag    Flag     Cylinders         Size            Blocks
  0       root    wm       0 -    31      128.00MB    (32/0/0)       262144
  1       swap    wu      32 -    63      128.00MB    (32/0/0)       262144
  2     backup    wu       0 - 57597      224.99GB    (57598/0/0) 471842816
  3 unassigned    wm       0                0         (0/0/0)             0
  4 unassigned    wm       0                0         (0/0/0)             0
  5 unassigned    wm       0                0         (0/0/0)             0
  6        usr    wm      64 - 57597      224.74GB    (57534/0/0) 471318528
  7 unassigned    wm       0                0         (0/0/0)             0

format> volname
Enter 8-character volume name (remember quotes)[""]:6140_22P
Ready to label disk, continue? yes
format> quit

Grow the filesystem

This can be done with the filesystem mounted.

[root@host oradata]# mkdir 22P 
[root@host oradata]# mount /dev/dsk/c8t600A0B80002A39FC000004DE47E92C69d0s6 /ora/oradata/22P
[root@host oradata]# df -h /ora/oradata/22P
Filesystem             size   used  avail capacity  Mounted on
/dev/dsk/c8t600A0B80002A39FC000004DE47E92C69d0s6
                       197G    64M   195G     1%    /ora/oradata/22P

[root@host oradata]# growfs -M /ora/oradata/22P /dev/rdsk/c8t600A0B80002A39FC000004DE47E92C69d0s6

[root@host oradata]# df -h /ora/oradata/22P
Filesystem             size   used  avail capacity  Mounted on
/dev/dsk/c8t600A0B80002A39FC000004DE47E92C69d0s6
                       221G    64M   219G     1%    /ora/oradata/22P

Done.