[Libguestfs] Bug: windows server 2012R2 fails to start after virt-resize

[Maxim Perevedentsev]

Just to remind: I am waiting for reaction on this issue.

I will create a patch for part_get/set_disk_guid, if you agree this 
feature is useful.
Thanks!

On 12/10/2015 04:34 PM, Maxim Perevedentsev wrote:
> On 12/10/2015 02:55 PM, Pino Toscano wrote:
>> On Thursday 10 December 2015 13:55:26 Maxim Perevedentsev wrote:
>>> Hello everyone!
>>>
>>> After I ran virt-resize (v1.31.28) on my disk with win2012R2
>>> (partition table [GPT]: VFAT (100M), unknown (128M), NTFS (64G))
>>> My VM fails to boot: black screen informing that
>>>
>>> Windows failed to start...
>>> Status: 0xc000000e
>>> Info: an unexpected error has occured.
>>>
>>> After some investigations, I realized that Windows remembers the GUID of
>>> disk it is installed to.
>>> If I execute
>>>
>>>   >guestfish -a win2012.hdd -v
>>> ...
>>>   ><fs> debug sh 'sgdisk -p /dev/sda'
>>> guestfsd: main_loop: new request, len 0x54
>>> /bin/sh -c sgdisk -p /dev/sda
>>> Disk /dev/sda: 136314880 sectors, 65.0 GiB
>>> Logical sector size: 512 bytes
>>> Disk identifier (GUID): B3108127-1775-47B7-ABC1-A56D6761C894
>>> Partition table holds up to 128 entries
>>> First usable sector is 34, last usable sector is 136314846
>>> Partitions will be aligned on 2048-sector boundaries
>>> Total free space is 2101181 sectors (1.0 GiB)
>>>
>>> Number  Start (sector)    End (sector)  Size       Code  Name
>>>      1            2048          206847   100.0 MiB   EF00  EFI
>>>      2          206848          468991   128.0 MiB   0C01  Microsoft
>>>      3          468992       134215679   63.8 GiB    0700  Basic
>>> guestfsd: main_loop: proc 76 (debug) took 0.00 seconds
>>>
>>> *set the GUID of original disk*
>>>   ><fs> debug sh 'sgdisk -U ADAA2225-3F89-4F2C-91DF-02F3E0C2ED67 /dev/sda'
>>> guestfsd: main_loop: new request, len 0x7c
>>> /bin/sh -c sgdisk -U ADAA2225-3F89-4F2C-91DF-02F3E0C2ED67 /dev/sda
>>> [   70.170139]  sda: sda1 sda2 sda3
>>> The operation has completed successfully.
>>> guestfsd: main_loop: proc 76 (debug) took 1.02 seconds
>>> The operation has completed successfully.
>>>
>>> After that Windows successfully boots from resized image.
>>>
>>> I suggest adding get/set disk GUID to API and to virt-resize as well.
>>> Otherwise it is impossible to resize disks with this particular OS (not
>>> only this one, possibly).
>> This is supposed to be done already, see
>>    https://bugzilla.redhat.com/show_bug.cgi?id=1189284
>> (and the commits linked to its comment #9).
> This is another bug: the fixed one was about partition GUIDs.
> Now partition GUIDs are preserved, but the OS refuses to boot because of
> changed *disk* GUID.
>> Please provide a full log of virt-resize with -v -x.
> OK, attached.
>>
>>
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>
> -- 
> Your sincerely,
> Maxim Perevedentsev
>
>
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-- 
Your sincerely,
Maxim Perevedentsev

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