Commands to find the free space within the EFI and Recovery partitions


zbook said:
When troubleshooting Windows upgrade failures the failure log files may report blocks due to deficient free space.

There may deficient space errors in one or more of these partitions:

EFI
system-reserved-partition
Primary
Recovery

The deficient space for the error message we-couldn-t-update-system-reserved-partition is frequently 3 MB.

“We couldn’t update system reserved partition” error installing Windows 10 - Microsoft Support

When upgrading to Windows 10, you may encounter the error “We couldn’t update system reserved partition”, error code 0xc1900104, or error code 0x8000f0922.
support.microsoft.com support.microsoft.com


Diskpart is useful for the primary partition.


What commands can be used before an upgrade attempt to determine the free space (MB) for each of these partitions?

EFI
system-reserved-partition
Recovery
Click to expand...
You can use Minitool Partition Wizard to peruse some of those hidden partitions
 

My Computer

System One

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    Windows 11 Pro
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Steve C said:
You can use Minitool Partition Wizard to peruse some of those hidden partitions
Click to expand...
Were you referring to right click explore?

How can you quickly determine free space if the software is installed?

What are Windows options if the software is nor installed?
 

My Computer

System One

  • OS
    Windows 10
    Computer type
    Laptop
    Manufacturer/Model
    HP
    CPU
    Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz
    Motherboard
    Product : 190A Version : KBC Version 94.56
    Memory
    16 GB Total: Manufacturer : Samsung MemoryType : DDR3 FormFactor : SODIMM Capacity : 8GB Speed : 1600
    Graphics Card(s)
    NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
    Sound Card
    IDT High Definition Audio CODEC; PNP Device ID HDAUDIO\FUNC_01&VEN_111D&DEV_76E0
    Hard Drives
    Model Hitachi HTS727575A9E364
    Antivirus
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    Other Info
    Mobile Workstation
garlin said:
Hmmm. Free space isn't correct for every partition.
Click to expand...
I don't know why. It seems to work fine for me with PowerShell 5.1
Code: 
DevicePath ==> Guid                    AccessPaths                                             Offset      Size (B) Size      D P Type     L VolLabel
-------------------                    -----------                                             ------      -------- ----      - - ----     - --------
{187a8621-89ba-4391-8054-5fdae03f0e43}                                                          17408     134217728 128,00 MB 1 1 Reserved           
  Free space:  ( N/A )

  \Device\HarddiskVolume2 ==>                                                                                                                        
{b753f357-ac6d-481c-8c98-8009638550df} \\?\Volume{b753f357-ac6d-481c-8c98-8009638550df}\    135266304     104857600 100,00 MB 1 2 System             
  Free space:  ( N/A )

  \Device\HarddiskVolume3 ==>                                                                                                                        
{84544550-bab0-45e4-9bdd-3d494bbf5f6c} C:\                                                  240123904  510961647616 475,87 GB 1 3 Basic    C Boot    
                                       \\?\Volume{84544550-bab0-45e4-9bdd-3d494bbf5f6c}\                                                             
  Free space: 88315183104 (82,25 GB)

  \Device\HarddiskVolume4 ==>                                                                                                                        
{4689c092-39fa-4e06-991d-6860c5ede57b} \\?\Volume{4689c092-39fa-4e06-991d-6860c5ede57b}\ 511201771520    2146431488 2,00 GB   1 4 Recovery           
  Free space: 1131892736 (1,05 GB)

  \Device\HarddiskVolume5 ==>                                                                                                                        
{d2ff97e0-07b4-49a7-b68a-7bab14b6c933} D:\                                               513348206592 1287009698304 1,17 TB   1 5 Basic    D Recover 
                                       \\?\Volume{d2ff97e0-07b4-49a7-b68a-7bab14b6c933}\                                                             
  Free space: 124493766656 (115,94 GB)

  \Device\HarddiskVolume6 ==>                                                                                                                        
none                                   Z:\                                                    1048576    8588886016 8,00 GB   0 1 IFS      Z RAMDISK 
                                       \\?\Volume{d94a8475-0000-0000-0000-100000000000}\                                                             
  Free space: 8522530816 (7,94 GB)
 

My Computers

System One System Two

  • OS
    11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Asus TUF Gaming F16 (2024)
    CPU
    i7 13650HX
    Memory
    16GB DDR5
    Graphics Card(s)
    GeForce RTX 4060 Mobile
    Sound Card
    Eastern Electric MiniMax DAC Supreme; Emotiva UMC-200; Astell & Kern AK240
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    Sony Bravia XR-55X90J
    Screen Resolution
    3840×2160
    Hard Drives
    512GB SSD internal
    37TB external
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    Li-ion
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    2× Arc Flow Fans, 4× exhaust vents, 5× heatpipes
    Keyboard
    Logitech K800
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    Logitech G402
    Internet Speed
    20Mbit/s up, 250Mbit/s down
    Browser
    FF
  • Operating System
    11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Medion S15450
    CPU
    i5 1135G7
    Memory
    16GB DDR4
    Graphics card(s)
    Intel Iris Xe
    Sound Card
    Eastern Electric MiniMax DAC Supreme; Emotiva UMC-200; Astell & Kern AK240
    Monitor(s) Displays
    Sony Bravia XR-55X90J
    Screen Resolution
    3840×2160
    Hard Drives
    2TB SSD internal
    37TB external
    PSU
    Li-ion
    Mouse
    Logitech G402
    Keyboard
    Logitech K800
    Internet Speed
    20Mbit/s up, 250Mbit/s down
    Browser
    FF
I used DiskGenius (Standard - paid) to enlarge my recovery partion to 1.2 GB. I did this once before when an update would not install. But a fresh install of 24H2 only made the recovery partition about 684MB.
 
Last edited:

My Computers

System One System Two

  • OS
    Windows 11 Pro 24H2 26100.2894
    Computer type
    Laptop
    Manufacturer/Model
    Acer Swift SF114-34
    CPU
    Pentium Silver N6000 1.10GHz
    Memory
    4GB
    Screen Resolution
    1920 x 1080
    Hard Drives
    SSD
    Cooling
    fanless
    Internet Speed
    150 Mbps
    Browser
    Brave
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    Webroot Secure Anywhere
    Other Info
    System 3

    ASUS T100TA Transformer
    Processor Intel Atom Z3740 @ 1.33GHz
    Installed RAM 2.00 GB (1.89 GB usable)
    System type 32-bit operating system, x64-based processor

    Edition Windows 10 Home
    Version 22H2 build 19045.3570
  • Operating System
    Windows 11 Pro 23H2 22631.2506
    Computer type
    Laptop
    Manufacturer/Model
    HP Mini 210-1090NR PC (bought in late 2009!)
    CPU
    Atom N450 1.66GHz
    Memory
    2GB
    Browser
    Brave
    Antivirus
    Webroot
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