External hard disk showing unallocated after plugging to Windows 11

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hardis2030

PCHF Member
Feb 9, 2022
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I have a 1TB Buffalo HD-PCU2 hard disk which was working perfectly.
Today for the first time I inserted it into a windows 11 system. It showed the new drive in the file explorer for a few minutes (though not accessible). After that I could not see the drive.
After that checking from the disk management, it is showing uninitiated & unallocated. Also the 1TB drive is showing up as a 2TB drive.
I tried with other machines having windows 10. But it is not working.
Can anybody help me find how I can recover the data from the drive.
The driver events are given below
Device USBSTOR\Disk&Ven_BUFFALO&Prod_HD-PCU2&Rev_0108\303030514234443137303734&0 was configured.

Driver Name: disk.inf
Class Guid: {4d36e967-e325-11ce-bfc1-08002be10318}
Driver Date: 06/21/2006
Driver Version: 10.0.22000.1
Driver Provider: Microsoft
Driver Section: disk_install.NT
Driver Rank: 0xFF0006
Matching Device Id: GenDisk
Outranked Drivers: disk.inf:GenDisk:00FF2002
Device Updated: false
Parent Device: USB\VID_0411&PID_01D9\303030514234443137303734
-0

Device USBSTOR\Disk&Ven_BUFFALO&Prod_HD-PCU2&Rev_0108\303030514234443137303734&0 was started.

Driver Name: disk.inf
Class Guid: {4d36e967-e325-11ce-bfc1-08002be10318}
Service: disk
Lower Filters:
Upper Filters:
-0

Device USBSTOR\DISK&VEN_BUFFALO&PROD_HD-PCU2&REV_0108\303030514234443137303734&0 was deleted.

Class Guid: {4d36e967-e325-11ce-bfc1-08002be10318}
-0

Device settings for USBSTOR\Disk&Ven_BUFFALO&Prod_HD-PCU2&Rev_0108\303030514234443137303734&0 were not migrated from previous OS installation due to partial or ambiguous device match.

Last Device Instance Id: USBSTOR\Disk&Ven_SanDisk&Prod_Extreme&Rev_0001\AA010116131122394547&0
Class Guid: {4d36e967-e325-11ce-bfc1-08002be10318}
Location Path:
Migration Rank: 0xF000FC000000F120
Present: false
Status: 0xC0000719
 
My guess is your drive is gone.
You can try to update the win 11 machine with the drive attached - update the Windows 11
Update the chipset drivers
I would NOT update the bios (incase you find that answer)
Do you have a windows 7 machine - Family or friend.
Is the data on the drive important ?

You can't see the drive in Win 10, Win 11, Ubuntu - Not looking good.
I don't think you will get an answer from Reddit. Bleeping Computers gave the same advice they think your drive is shot
If you need the data then
Try this https://www.easeus.com/resource/retrieving-data-from-disk-unknown-not-initialized.html
or try this https://www.minitool.com/data-recovery/hdd-shows-as-unknown.html

I have not tried any of the above and I do not know if you will be asked to buy software from either site
 
Okay will try updating the drivers. Seems like it is gone. But the data is important. so trying to retrieve it in anyway.

Thanks for the support
 
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