[bug #52121] Grub2 fails to load image stored in btrfs preallocated extent

[Roland Wirth]

URL:
  <http://savannah.gnu.org/bugs/?52121>

                 Summary: Grub2 fails to load image stored in btrfs
preallocated extent
                 Project: GNU GRUB
            Submitted by: rwirth
            Submitted on: Tue 26 Sep 2017 05:58:13 PM UTC
                Category: Booting
                Severity: Major
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: 2.02
         Reproducibility: Every Time
         Planned Release: None

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Details:

After rsyncing my /boot to a new drive using the --preallocate option GRUB
2.02 refuses to boot the Linux kernel bzImage with 'unsupported extent type
0x2'. The problem vanishes when copying the image to a different file. Type
0x2 marks a preallocated extent. 




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