[SOLVED] Windows Server 2019 not starting after disk rezise

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DNA_Maximal

New Member
Jan 16, 2025
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Hello,

I recently rezised the disk of my Windows Server 2019 VM and now it does not boot.
Before shutting down, to rezise the disk, the OS did some kind of Updates, i dont remember what. A
fter trying to start the VM, it tried to repair the system, then showed a Windows Logo for about 5 seconds and crashed.

I tryed to repair the System with the install ISO, but it didnt boot either. Also i tryied rezising the main partition in GParted, so it takes the whole Disk, still no Luck.

Here the qm config and some screenshots

Code: 
balloon: 10240
boot: order=ide2;ide0
cores: 6
cpu: x86-64-v2-AES
ide0: local-lvm:vm-100-disk-0,size=512G,ssd=1
ide1: local:iso/gparted-live-1.7.0-1-amd64.iso,media=cdrom,size=562M
ide2: local:iso/DE_NTRL_Win_Svr_Essentials_2019_1809.2_x64_X22-17479.ISO,media=cdrom,size=4921534K
machine: pc-i440fx-8.1
memory: 24576
meta: creation-qemu=8.1.5,ctime=1737205304
name: ffs-dc01
net0: e1000=BC:24:11:AD:89:9D,bridge=vmbr0,firewall=1,tag=99
net1: e1000=BC:24:11:53:0E:9C,bridge=vmbr0,firewall=1
numa: 0
onboot: 1
ostype: win10
scsihw: virtio-scsi-single
smbios1: uuid=b3475d0b-4702-4ce4-a4fb-9714666d3920
sockets: 1
vmgenid: 2fe50a7f-3367-4fce-959e-084042a36cc9

1746296993371.png
1746297157508.png
 
If it's not working after resizing it could be a problem with the boot partition. My first try would be to recreate the boot partition.

Try to boot from integrated Win PE and start a cmd console; or start from Windows Install ISO and open a cmd console by pressing Shift + F10.

You currently use IDE as disk interface. That is very slow and should be changed to virtio in future but should make repair easier.
Or did you maybe changed the device type for resizing the partition and you used virtio previously? Then maybe the boot device is not found and you should detach the disk and reattach it as virtio scsi disk.


if you use virtio, your first step is to load the virtio driver. mount the virtio driver disk and load the disk driver via

# load virtio driver
drvload <inf path>

# start diskpart
diskpart

# find your boot device
list disk
select disk <number>

# find your boot part and remove it
list part
select part <number>
delete part override


# recreate boot partition

# on uefi
create partition efi size=500

# on bios (this should be your partition type)
create partition fat32 size=500

# format, assign letter and quit diskpart
format fs=fat32 quick
assign letter y
exit

# create new boot partiton; maybe you have to adopt your drive letter C: to the current position of your windows in recovery environment
bcdboot C:\Windows /s y: /f ALL





Next time: create a snapshot before resizing or create automatically snapshots via https://github.com/Corsinvest/cv4pve-autosnap
 
Last edited:
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ivenae said:
If it's not working after resizing it could be a problem with the boot partition. My first try would be to recreate the boot partition.

Try to boot from integrated Win PE and start a cmd console; or start from Windows Install ISO and open a cmd console by pressing Shift + F10.

You currently use IDE as disk interface. That is very slow and should be changed to virtio in future but should make repair easier.
Or did you maybe changed the device type for resizing the partition and you used virtio previously? Then maybe the boot device is not found and you should detach the disk and reattach it as virtio scsi disk.


if you use virtio, your first step is to load the virtio driver. mount the virtio driver disk and load the disk driver via

# load virtio driver
drvload <inf path>

# start diskpart
diskpart

# find your boot device
list disk
select disk <number>

# find your boot part and remove it
list part
select part <number>
delete part override


# recreate boot partition

# on uefi
create partition efi size=500

# on bios (this should be your partition type)
create partition fat32 size=500

# format, assign letter and quit diskpart
format fs=fat32 quick
assign letter y
exit

# create new boot partiton; maybe you have to adopt your drive letter C: to the current position of your windows in recovery environment
bcdboot C:\Windows /s y: /f ALL





Next time: create a snapshot before resizing or create automatically snapshots via https://github.com/Corsinvest/cv4pve-autosnap
Click to expand...
Thanks for your Help. Unfortunately i can’t get any Windows based OS or ISO to start. Only Linux like GParted will work
[EDIT] Windows 11 ISO seems to work, but Windows Server and Hirens Boot CD wont.
 
Last edited:
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