[Bug 882197] Re: data loss in conversion to or from vpc

Scott Moser smoser at canonical.com
Wed Oct 26 19:00:14 UTC 2011


Just to test whether it was reading or writing that was the error, I tried this:
 $ qemu-img info /tmp/convtest.vpc
image: /tmp/convtest.vpc
file format: vpc
virtual size: 2.0G (2147991552 bytes)
disk size: 645M

The size there is incorrect, and identical to what the size of the
target is after converting back to raw.

Then, testing vboxmanage:
 $ vboxmanage convertfromraw /tmp/convtest.raw /tmp/convtest.vpc.vboxmanage
 $ qemu-img info /tmp/convtest.vpc.vboxmanage | grep "irtual size:"
  virtual size: 2.0G (2147483648 bytes)
  $ qemu-img convert -O raw /tmp/convtest.vpc.vboxmanage /tmp/convtest.raw.from-vbox-vpc
  $ ls -l /tmp/convtest.raw.from-vbox-vpc
  -rw-r--r-- 1 smoser smoser 2147483648 2011-10-26 14:58 /tmp/convtest.raw.from-vbox-vpc
  $ md5sum /tmp/convtest.raw.from-vbox-vpc
  c1f6e09e96361c4f56aea0b9ea845a36  /tmp/convtest.raw.from-vbox-vpc

So, it seems there is a bug writing the vpc format, while reading the
format as written by vboxmanage works fine.

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https://bugs.launchpad.net/bugs/882197

Title:
  data loss in conversion to or from vpc

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