KB5067036 and W11-25H2: Inaccessible Storage Spaces - Have Repro Path

Question

KB5067036 and W11-25H2: Inaccessible Storage Spaces - Have Repro Path

Kelly Birr 30

After installing KB5067036 update on Windows 11 Enterprise or Windows 11 IOT Enterprise, any Storage Pools for SAS connected (or virtual SAS) disks with v29 metadata will not come online. I have a VM right now that reproduces the issue and am willing to help troubleshoot.

Uninstalling KB5067036 resolves the issue.
Installing the full 25H2 update did NOT resolve the issue.
I've not tried an uninstall of full 25H2 update yet.

REPRO PATH

Install a VM of Windows 11 Enterprise or IOT Enterprise 24H2.
Add two additional virtual SCSI disks and configure them as a storage pool with ReFS formatted mirror volume, pool comes up and works.
Use Settings > Storage Spaces, to upgrade pool metadata to v29, pool and volume still good.
Install KB5067036 update and reboot.
Pool and volume are inaccessible after reboot

Diagnose with PowerShell

User's image

The disks are online in Disk Management. There is simply no way to get the storage pool online without reverting the windows update.

Additional notes:

My easy repro path is with a Hyper-V VM, however I first experienced it with a desktop. The issue is not limited to VMs.
On the desktop the storage pool made of NVMe disk was not impacted and continued to work correctly.
Multiple SAS connected storage pools were affected, despite being two different SAS controllers. These are SAS HBAs, not RAID controllers. This is not a conflict with Hardware RAID.

Kelly Birr 30 Reputation points

2025-10-30T19:50:44.1933333+00:00

Note: The metadata and all user data on the pool is still intact. If you attach the disks (physical or virtual) to a win 11 24H2 machine or Server 2025 machine, the pool can be accessed, and data can be retrieved. Windows 11 25H2 simply refuses to bring the pool online.

Answer accepted by question author

2 additional answers

Your answer

Kelly Birr 30 Reputation points

2025-10-30T19:50:44.1933333+00:00

Note: The metadata and all user data on the pool is still intact. If you attach the disks (physical or virtual) to a win 11 24H2 machine or Server 2025 machine, the pool can be accessed, and data can be retrieved. Windows 11 25H2 simply refuses to bring the pool online.

Answer 1

Domic Vo 11,305 Independent Advisor

Dear Kelly Birr,

Thank you for pointing out. Your findings align with a known issue currently under internal investigation.

We recommend not installing KB5067036 on systems with SAS-based storage pools using v29 metadata until a resolution is confirmed.

If the update has already been applied, uninstalling KB5067036 is currently the most effective workaround.

We do not recommend uninstalling the full 25H2 update at this time, as it may not resolve the issue and could introduce additional complexity.

Since you have a reproducible environment, we would greatly appreciate any logs or diagnostic data you can share, such as:

Output from Get-StoragePool and Get-VirtualDisk

Event Viewer logs under Storage Spaces and System

Any relevant entries from Get-PhysicalDisk | Format-List

Let me know how it goes, and if this answer helps, feel free to hit “Accept Answer” so others can benefit too 😊

T&B,

Domic Vo.

Kelly Birr 30

Hi Dominic,

I am happy to help troubleshoot this. The screenshot I included does have the much of output you've requested, here is a console log from my VM with the requested commands.

Windows PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.

Install the latest PowerShell for new features and improvements! https://aka.ms/PSWindows

PS C:\Users\kb> Import-Module Storage
PS C:\Users\kb> Get-StoragePool

FriendlyName OperationalStatus HealthStatus IsPrimordial IsReadOnly   Size AllocatedSize
------------ ----------------- ------------ ------------ ----------   ---- -------------
Primordial   OK                Healthy      True         False      509 GB     253.97 GB


PS C:\Users\kb> Get-VirtualDisk
PS C:\Users\kb> Get-PhysicalDisk | Format-List


ObjectId                         : {1}\\DESKTOP-2KNPIPP\root/Microsoft/Windows/Storage/Providers_v2\SPACES_PhysicalDisk.ObjectId="{a1f0f41f-4be1-11f0-b7ed-806e6f6e6963}:PD:{ba258028-bc60-29d2-7bf3-0c0d06d0018
                                   7}"
PassThroughClass                 :
PassThroughIds                   :
PassThroughNamespace             :
PassThroughServer                :
UniqueId                         : 6002248017CE48BC8806D8B0EB464D2D
Description                      :
FriendlyName                     : Msft Virtual Disk
HealthStatus                     : Healthy
Manufacturer                     : Msft
Model                            : Virtual Disk
OperationalDetails               :
OperationalStatus                : OK
PhysicalLocation                 : Integrated : Bus 0 : Device 38830 : Function 11326 : Adapter 0 : Port 0 : Target 0 : LUN 0
SerialNumber                     :
AdapterSerialNumber              :
AllocatedSize                    : 273803116544
BusType                          : SAS
CannotPoolReason                 : Insufficient Capacity
CanPool                          : False
DeviceId                         : 0
EnclosureNumber                  :
FirmwareVersion                  : 1.0
FruId                            :
IsIndicationEnabled              : False
IsPartial                        : True
LogicalSectorSize                : 512
MediaType                        : Unspecified
OtherCannotPoolReasonDescription :
PartNumber                       :
PhysicalSectorSize               : 4096
Size                             : 273804165120
SlotNumber                       :
SoftwareVersion                  :
SpindleSpeed                     : 0
StoragePoolUniqueId              :
SupportedUsages                  : {Auto-Select, Manual-Select, Hot Spare, Retired...}
UniqueIdFormat                   : FCPH Name
Usage                            : Auto-Select
VirtualDiskFootprint             : 0
PSComputerName                   :
ClassName                        : MSFT_PhysicalDisk

ObjectId                         : {1}\\DESKTOP-2KNPIPP\root/Microsoft/Windows/Storage/Providers_v2\SPACES_PhysicalDisk.ObjectId="{a1f0f41f-4be1-11f0-b7ed-806e6f6e6963}:PD:{d00b2837-c97d-2bf8-739c-265bbadc98a
                                   3}"
PassThroughClass                 :
PassThroughIds                   :
PassThroughNamespace             :
PassThroughServer                :
UniqueId                         : 60022480778C6363A751EFAF7FD151D6
Description                      :
FriendlyName                     : Msft Virtual Disk
HealthStatus                     : Unknown
Manufacturer                     : Msft
Model                            : Virtual Disk
OperationalDetails               :
OperationalStatus                : {Starting, OK}
PhysicalLocation                 : Integrated : Bus 0 : Device 38830 : Function 11326 : Adapter 0 : Port 0 : Target 0 : LUN 3
SerialNumber                     :
AdapterSerialNumber              :
AllocatedSize                    : 136365211648
BusType                          : SAS
CannotPoolReason                 : Starting
CanPool                          : False
DeviceId                         : 2
EnclosureNumber                  :
FirmwareVersion                  : 1.0
FruId                            :
IsIndicationEnabled              : False
IsPartial                        : False
LogicalSectorSize                : 512
MediaType                        : Unspecified
OtherCannotPoolReasonDescription :
PartNumber                       :
PhysicalSectorSize               : 4096
Size                             : 136365211648
SlotNumber                       :
SoftwareVersion                  :
SpindleSpeed                     : 0
StoragePoolUniqueId              : {e4fa723b-92c7-4f6a-8a93-da5af87ae8ae}
SupportedUsages                  : {Auto-Select, Manual-Select, Hot Spare, Retired...}
UniqueIdFormat                   : FCPH Name
Usage                            : Unknown
VirtualDiskFootprint             : 0
PSComputerName                   :
ClassName                        : MSFT_PhysicalDisk

ObjectId                         : {1}\\DESKTOP-2KNPIPP\root/Microsoft/Windows/Storage/Providers_v2\SPACES_PhysicalDisk.ObjectId="{a1f0f41f-4be1-11f0-b7ed-806e6f6e6963}:PD:{f3f9f967-8eef-d300-e0da-4e487d5c34f
                                   f}"
PassThroughClass                 :
PassThroughIds                   :
PassThroughNamespace             :
PassThroughServer                :
UniqueId                         : 60022480419327BD1D4D758DF85E3AF0
Description                      :
FriendlyName                     : Msft Virtual Disk
HealthStatus                     : Unknown
Manufacturer                     : Msft
Model                            : Virtual Disk
OperationalDetails               :
OperationalStatus                : {Starting, OK}
PhysicalLocation                 : Integrated : Bus 0 : Device 38830 : Function 11326 : Adapter 0 : Port 0 : Target 0 : LUN 2
SerialNumber                     :
AdapterSerialNumber              :
AllocatedSize                    : 136365211648
BusType                          : SAS
CannotPoolReason                 : Starting
CanPool                          : False
DeviceId                         : 1
EnclosureNumber                  :
FirmwareVersion                  : 1.0
FruId                            :
IsIndicationEnabled              : False
IsPartial                        : False
LogicalSectorSize                : 512
MediaType                        : Unspecified
OtherCannotPoolReasonDescription :
PartNumber                       :
PhysicalSectorSize               : 4096
Size                             : 136365211648
SlotNumber                       :
SoftwareVersion                  :
SpindleSpeed                     : 0
StoragePoolUniqueId              : {e4fa723b-92c7-4f6a-8a93-da5af87ae8ae}
SupportedUsages                  : {Auto-Select, Manual-Select, Hot Spare, Retired...}
UniqueIdFormat                   : FCPH Name
Usage                            : Unknown
VirtualDiskFootprint             : 0
PSComputerName                   :
ClassName                        : MSFT_PhysicalDisk



PS C:\Users\kb>

Kelly Birr 30 Reputation points

2025-10-30T21:23:02.24+00:00

Is it possible to comment back here when a resolution is confirmed, that will help myself and others know when it's safe to install 25H2.

Kelly Birr 30

My comments vanished when I accepted the answer. Here is the requested output again.

Windows PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.

Install the latest PowerShell for new features and improvements! https://aka.ms/PSWindows

PS C:\Users\kb> Import-Module Storage
PS C:\Users\kb> Get-StoragePool

FriendlyName OperationalStatus HealthStatus IsPrimordial IsReadOnly   Size AllocatedSize
------------ ----------------- ------------ ------------ ----------   ---- -------------
Primordial   OK                Healthy      True         False      509 GB     253.97 GB


PS C:\Users\kb> Get-VirtualDisk
PS C:\Users\kb> Get-PhysicalDisk | Format-List


ObjectId                         : {1}\\DESKTOP-2KNPIPP\root/Microsoft/Windows/Storage/Providers_v2\SPACES_PhysicalDisk.ObjectId="{a1f0f41f-4be1-11f0-b7ed-806e6f6e6963}:PD:{ba258028-bc60-29d2-7bf3-0c0d06d0018
                                   7}"
PassThroughClass                 :
PassThroughIds                   :
PassThroughNamespace             :
PassThroughServer                :
UniqueId                         : 6002248017CE48BC8806D8B0EB464D2D
Description                      :
FriendlyName                     : Msft Virtual Disk
HealthStatus                     : Healthy
Manufacturer                     : Msft
Model                            : Virtual Disk
OperationalDetails               :
OperationalStatus                : OK
PhysicalLocation                 : Integrated : Bus 0 : Device 38830 : Function 11326 : Adapter 0 : Port 0 : Target 0 : LUN 0
SerialNumber                     :
AdapterSerialNumber              :
AllocatedSize                    : 273803116544
BusType                          : SAS
CannotPoolReason                 : Insufficient Capacity
CanPool                          : False
DeviceId                         : 0
EnclosureNumber                  :
FirmwareVersion                  : 1.0
FruId                            :
IsIndicationEnabled              : False
IsPartial                        : True
LogicalSectorSize                : 512
MediaType                        : Unspecified
OtherCannotPoolReasonDescription :
PartNumber                       :
PhysicalSectorSize               : 4096
Size                             : 273804165120
SlotNumber                       :
SoftwareVersion                  :
SpindleSpeed                     : 0
StoragePoolUniqueId              :
SupportedUsages                  : {Auto-Select, Manual-Select, Hot Spare, Retired...}
UniqueIdFormat                   : FCPH Name
Usage                            : Auto-Select
VirtualDiskFootprint             : 0
PSComputerName                   :
ClassName                        : MSFT_PhysicalDisk

ObjectId                         : {1}\\DESKTOP-2KNPIPP\root/Microsoft/Windows/Storage/Providers_v2\SPACES_PhysicalDisk.ObjectId="{a1f0f41f-4be1-11f0-b7ed-806e6f6e6963}:PD:{d00b2837-c97d-2bf8-739c-265bbadc98a
                                   3}"
PassThroughClass                 :
PassThroughIds                   :
PassThroughNamespace             :
PassThroughServer                :
UniqueId                         : 60022480778C6363A751EFAF7FD151D6
Description                      :
FriendlyName                     : Msft Virtual Disk
HealthStatus                     : Unknown
Manufacturer                     : Msft
Model                            : Virtual Disk
OperationalDetails               :
OperationalStatus                : {Starting, OK}
PhysicalLocation                 : Integrated : Bus 0 : Device 38830 : Function 11326 : Adapter 0 : Port 0 : Target 0 : LUN 3
SerialNumber                     :
AdapterSerialNumber              :
AllocatedSize                    : 136365211648
BusType                          : SAS
CannotPoolReason                 : Starting
CanPool                          : False
DeviceId                         : 2
EnclosureNumber                  :
FirmwareVersion                  : 1.0
FruId                            :
IsIndicationEnabled              : False
IsPartial                        : False
LogicalSectorSize                : 512
MediaType                        : Unspecified
OtherCannotPoolReasonDescription :
PartNumber                       :
PhysicalSectorSize               : 4096
Size                             : 136365211648
SlotNumber                       :
SoftwareVersion                  :
SpindleSpeed                     : 0
StoragePoolUniqueId              : {e4fa723b-92c7-4f6a-8a93-da5af87ae8ae}
SupportedUsages                  : {Auto-Select, Manual-Select, Hot Spare, Retired...}
UniqueIdFormat                   : FCPH Name
Usage                            : Unknown
VirtualDiskFootprint             : 0
PSComputerName                   :
ClassName                        : MSFT_PhysicalDisk

ObjectId                         : {1}\\DESKTOP-2KNPIPP\root/Microsoft/Windows/Storage/Providers_v2\SPACES_PhysicalDisk.ObjectId="{a1f0f41f-4be1-11f0-b7ed-806e6f6e6963}:PD:{f3f9f967-8eef-d300-e0da-4e487d5c34f
                                   f}"
PassThroughClass                 :
PassThroughIds                   :
PassThroughNamespace             :
PassThroughServer                :
UniqueId                         : 60022480419327BD1D4D758DF85E3AF0
Description                      :
FriendlyName                     : Msft Virtual Disk
HealthStatus                     : Unknown
Manufacturer                     : Msft
Model                            : Virtual Disk
OperationalDetails               :
OperationalStatus                : {Starting, OK}
PhysicalLocation                 : Integrated : Bus 0 : Device 38830 : Function 11326 : Adapter 0 : Port 0 : Target 0 : LUN 2
SerialNumber                     :
AdapterSerialNumber              :
AllocatedSize                    : 136365211648
BusType                          : SAS
CannotPoolReason                 : Starting
CanPool                          : False
DeviceId                         : 1
EnclosureNumber                  :
FirmwareVersion                  : 1.0
FruId                            :
IsIndicationEnabled              : False
IsPartial                        : False
LogicalSectorSize                : 512
MediaType                        : Unspecified
OtherCannotPoolReasonDescription :
PartNumber                       :
PhysicalSectorSize               : 4096
Size                             : 136365211648
SlotNumber                       :
SoftwareVersion                  :
SpindleSpeed                     : 0
StoragePoolUniqueId              : {e4fa723b-92c7-4f6a-8a93-da5af87ae8ae}
SupportedUsages                  : {Auto-Select, Manual-Select, Hot Spare, Retired...}
UniqueIdFormat                   : FCPH Name
Usage                            : Unknown
VirtualDiskFootprint             : 0
PSComputerName                   :
ClassName                        : MSFT_PhysicalDisk



PS C:\Users\kb>

Kelly Birr 30 Reputation points

2025-10-30T21:42:02.12+00:00

Event logs attached

I had to add ".log" to the file names, the site would not accept ".evtx"

storage-spaces-driver-diagnostic.evtx.log

storage-spaces-api.evtx.log

storage-spaces-driver-operational.evtx.log

storage-spaces-managementagent-whc.evtx.log

storage-spaces-spacemanager-diagnostic.evtx.log

storagevolume-operational.evtx.log

storport-ms-windows-storage-storport-operational.evtx.log

storsvc-diagnotstic.evtx.log

system.evtx.log
Kelly Birr 30 Reputation points

2025-10-30T21:43:51.6966667+00:00

here is the local metadata from my use of feedback hub, also renamed

LocaleMetaData.zip.txt
Kelly Birr 30 Reputation points

2025-10-30T21:45:06.1533333+00:00

Domnic, I attached metadata and event logs, but my comments got deleted for "code of conduct violation". How do I get them to you?
Erland Sommarskog 128.7K Reputation points MVP Volunteer Moderator

2025-10-30T21:56:30.52+00:00

The spam filter is sometimes a bit overly aggressive. I've resurrected your post.

But just to point out the obvious: This is a public forum, so think twice if there could be any private information in those logs you don't want everyone to see.
Kelly Birr 30 Reputation points

2025-10-30T21:58:36.01+00:00

Thanks Erland! This is a VM with nothing personal on it. I set it up specifically to repro this issue.
Luke Smith 0 Reputation points

2025-11-12T23:58:28.6766667+00:00

How can I uninstall it? That option has disappeared now it's been pushed to all.

Answer 2

Luke Smith 0

This update was pushed to my machine again now its publicly released, and now isn't uninstallable, and my Storage Space is inaccessible again.

How do I fix it?

P M 1 Reputation point

2025-11-10T14:27:03.26+00:00

I'm also having this problem.

Answer 3

Kelly Birr 30

I installed windows update "2025-11 Security Update (KB5068861) (26200.7171)" on the VM today and the storage space came back online. Can anyone else confirm this fixes the issue for them?

Kelly Birr 30 Reputation points

2025-11-18T18:05:56.44+00:00

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KB5067036 and W11-25H2: Inaccessible Storage Spaces - Have Repro Path

2 additional answers

Your answer