[Qemu-devel] [Bug 1808928] Re: Bitmap Extra data is not supported

[Ali Sag]

as far as i know nothing happened. it had worked normally while instance
was running. For a reason, instance is shutdown, then it never open
again. i have some backups, i tried to return previous backups. But they
also gave same error. Thanks to replication i could get it back. i
copied image from replication site...

as i said "qemu-img" command completely unusable on that image. 
There should be another mechanism. It blocks everything. 
I try to edit header to remove extra data. But i could not find header 
information on website. 

thanks

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https://bugs.launchpad.net/bugs/1808928

Title:
  Bitmap Extra data is not supported

Status in QEMU:
  New

Bug description:
  i am using dirty bitmaps and drive-backup. It works as aspected.

  Lately, i encounter a disastrous error. There is not any information
  about that situation. I cannot reach/open/attach/info or anything with
  a qcow2 file.

  virsh version
  Compiled against library: libvirt 4.10.0
  Using library: libvirt 4.10.0
  Using API: QEMU 4.10.0
  Running hypervisor: QEMU 2.12.0

  "qemu-img: Could not open '/var/lib/libvirt/images/test.qcow2': Bitmap
  extra data is not supported"

  what is that mean? what should i do?
  i cannot remove bitmap. i cannot open image or query.

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