Re: Access to GPT and partitions within a VND image

[John Nemeth <jnemeth%cue.bc.ca@localhost>]

On Feb 15, 15:25, Matthias Petermann wrote:
} 
} I am using file-backed vnds as storage for my Xen domains. In each of 
} the vnds there is a GPT with the corresponding partitions.
} 
} Is there an easy way to access the GPT and the partitions from outside, 
} i.e. preferably from the host to the image file? I would like to 
} implement a kind of thin-provisioning, where I copy a base image as a 
} sparse file over and over again, and then change a few small things in 
} it before the first start of the domain - like the fixed IP address.

     Did you try it?

i386devel: {19} ls -agl disk
-rw-r--r--  1 root  wheel  10485760 Dec 11 19:14 disk
i386devel: {20} gpt show disk
  start   size  index  contents
      0      1         PMBR
      1      1         Pri GPT header
      2     32         Pri GPT table
     34  20413         Unused
  20447     32         Sec GPT table
  20479      1         Sec GPT header
i386devel: {21} gpt add disk
disk: Partition 1 added: 49f48d5a-b10e-11dc-b99b-0019d1879648 34 20413
i386devel: {22} vnconfig vnd0 disk
i386devel: {23} tail /var/log/messages
Feb 15 09:34:13 i386devel /netbsd: [ 8774614.0138168] vnd0: GPT GUID: 72d09e6e-60f0-457b-a9a0-5ae67e18b044
Feb 15 09:34:13 i386devel /netbsd: [ 8774614.0138168] dk2 at vnd0: "fc24628d-f3ef-443e-9928-2886af3b495b", 20413 blocks at 34, type: ffs

}-- End of excerpt from Matthias Petermann