The problem is that the disk label of the vdisk needs to be adjusted
to the new size of the vdisk. The vdisk actually sees its new size but
format(1m) shows info from the disk label (which still relies on the old
size).

 Unfortunately, unless you run Solaris 11 and use EFI disk label, there's
no tool to adjust the disk label to the new disk size. There are some
manual procedures using format(1m) but they are a bit risky.

 This problem is tracked by the following CR:

  6241086 Format should allow label adjustment when disk/lun size changes
  6725986 format(1m) "expand" command should also work with VTOC label

alex.

On 12/08/10 17:33, Tony MacDoodle wrote:
I tried it and when I boot into single user and did a format, the increase in 
size was not seen.

On Tue, Dec 7, 2010 at 5:51 PM, Nathan Kroenert <[email protected] 
<mailto:[email protected]>> wrote:

    IIRC, I did this ages ago on a box I was playing with.

    There was some fooling around to do though... as ZFS boot disks use slices, 
and an SMI label, not an EFI label and whole disk...

    I vaguely recall changing the underlying volsize with the LDOM down, then 
net-booting single user, using format to alter the size of slice 0, then
    rebooting all the way back up, and the zpool auto-expanded to use the rest 
of the disk.

    And - if you are using mirrors, you won't see the extra space until both 
sides are done.

    I'd be inclined to spin up a baby test LDOM and give it a crack - but be 
sure that you get Oracle's buy-in to be sure they won't arbitrarily
    decide that it's not a supported procedure.

    You might also need to watch out for the auto-expand property for the zpool 
- depending on what Solaris you are running, you might see different
    behaviour...

    Cheers!

    Nathan.



    On 8/12/2010 7:42 AM, Tony MacDoodle wrote:

        Hello,

        We are using ZFS volumes as guest domain boot disks and was wondering
        if its possible to increase the size of the boot drives without
        rebuilding?

        Thanks
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