system reserve


I just wanted to make a couple of corrections because I noticed some incorrect terminology used a few times that could lead to confusion:

There is more than one partition some are referring to as a "reserved" partition so it's important to differentiate between them.

The System Reserved partition is typically about 500 MB in size with Win 10+. The size can vary a bit, that's a typical value. Note that only an MBR disk has a System Reserved partition. On a GPT disk, this partition is known as the Recovery Partition which holds the Recovery Environment (Windows RE).

The MSR or MicroSoft Reserved partition is the 16 MB partition on a GPT OS drive and is unformatted. On non-OS GPT disks, the MSR is 128 MB for disks larger than 16 GB, 32 MB for disks smaller than 16 GB. You can typically delete this partition, it's considered "Reserved for Future Use", so if you prefer upgrades installs rather than clean installs, there is a possibility that you may one day find Microsoft using this partition, but who knows what they will do :-)

The EFI partition on a GPT disk is 100 MB except in the case of an Advanced Format 4K drive because the minimum FAT32 partition size on this type of disk is 260 MB. For use with scripts or unattended installs I always specify a size of 260 MB to guarantee that it will work on any disk.

With all that said, the real question in my mind is this: On a system with so much available free space in the primary partition, why would a 16 MB partition (one sixty-fourth of a GB) even concern you? I would be far more inclined to leave it alone unless I was somehow desperate for space, but that's just my opinion :-)
 

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    Win11 Pro 25H2 (RTM+)Intel i7-14650HX32 GBNo GPU - Built-in Intel Graphics
    OS
    Win11 Pro 25H2 (RTM+)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Acemagic
    CPU
    Intel i7-14650HX
    Memory
    32 GB
    Graphics Card(s)
    No GPU - Built-in Intel Graphics
    Sound Card
    Integrated
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    Varies as machine will often be moved to locations with different monitors
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    1 x 1TB Gen 4 NVMe SSD
    PSU
    120W Power Brick
    Keyboard
    Corsair K70 Max RGB Magnetic Keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    1Gb Up / 1 Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
  • At a glance

    Win11 Pro 25H2 (RTM+)Intel i7-1255U16 GBIntel Iris Xe Graphics
    Operating System
    Win11 Pro 25H2 (RTM+)
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 13x Gen 2
    CPU
    Intel i7-1255U
    Memory
    16 GB
    Graphics card(s)
    Intel Iris Xe Graphics
    Sound Card
    Realtek® ALC3306-CG codec
    Monitor(s) Displays
    13.3-inch IPS Display
    Screen Resolution
    WQXGA (2560 x 1600)
    Hard Drives
    2 TB 4 x 4 NVMe SSD
    PSU
    USB-C / Thunderbolt 4 Power / Charging
    Keyboard
    Backlit, spill resistant keyboard
    Mouse
    Buttonless Glass Precision Touchpad
    Internet Speed
    1Gb Up / 1Gb Down
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    Edge
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    Windows Defender
    Other Info
    WiFi 6e / Bluetooth 5.1 / Facial Recognition / Fingerprint Sensor / ToF (Time of Flight) Human Presence Sensor
I haven't had any check disk/repair since the removal...Before it would randomly do so to all drives in the computer
 

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At a glance

windows 11Intel i5-10600kf32gb corsair vengerance proAMD RX 6500XT
OS
windows 11
Computer type
PC/Desktop
Manufacturer/Model
Antec/Case
CPU
Intel i5-10600kf
Motherboard
GIGABYTE Z590 UD AC
Memory
32gb corsair vengerance pro
Graphics Card(s)
AMD RX 6500XT
Sound Card
onboard
Monitor(s) Displays
40" Hisense
Hard Drives
Samsung 850
Samsung 870
Seagate 2TB
PSU
EVGA GQ 750
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