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

[Maxim Perevedentsev]

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-------- Forwarded Message --------
Subject: 	Re: [Libguestfs] Bug: windows server 2012R2 fails to start 
after virt-resize
Date: 	Thu, 10 Dec 2015 16:34:01 +0300
From: 	Maxim Perevedentsev <mperevedentsev at virtuozzo.com>
To: 	libguestfs at redhat.com



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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> Libguestfs at redhat.com
> https://www.redhat.com/mailman/listinfo/libguestfs

-- 
Your sincerely,
Maxim Perevedentsev



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