SSD has 3 MBR's . Is this normal?


  1. Posts : 119
    Windows 10 Pro
       #1

    SSD has 3 MBR's . Is this normal?


    Hi Friends,
    Not sure if this is normal or maybe I did something to make another MBR.
    I know have 3 MDR on my boot SSD and want to know if this is normal or did I do something in the the past when I recovered from a mirror image?
    Can anyone help and explain?
    Should I reformat and reinstall my mirror image from the past?

    THe reason I ask is that startup time has increased and I just noticed and started looking why.

    Running Win 10 64 bit off of a Samsung EVO 250 gb SSD
    Attached Thumbnails Attached Thumbnails SSD has 3 MBR's . Is this normal?-annotation-2020-07-16-081526.jpg   SSD has 3 MBR's . Is this normal?-annotation-2020-07-16-082608.jpg  
      My Computer


  2. Posts : 17,373
    Windows 11 Pro
       #2

    Your layout is normal. You have a 500 MB system partition the computer boots from, followed by your 208 GB partition containing C: drives with Windows, and a 522 MB recovery partition. That's the standard legacy BIOS drive layout created by Windows. You also have 23 GB wasted space at the end of the SSD set aside for overprovisioning which is not required so long as you have empty space available in your C: drive partition.

    And you don't really have "3 MBRs". You have 3 partitions created on an MBR partitioned drive. The labels MBR 0, etc. are just that particular programs way of identifying partitions on an MBR type drive.
      My Computer


  3. Posts : 446
    Windows 10
       #3

    Yes, each MBR disk has only one MBR, and its outside of all partitions, not in any partition.

    But I think the last space is just normal unallocated space. I have never seen overprovisioning space shown in Disk management, or in any other partition manager.
      My Computer


  4. Posts : 119
    Windows 10 Pro
    Thread Starter
       #4

    Thanks NavyLCDR

    I thought I turned off my Samsung Overprovisioning prior to removing the software as I didn't need that.
    I will reinstall the software from samsung then remove if I can.
      My Computer


  5. Posts : 17,373
    Windows 11 Pro
       #5

    winxp said:
    Thanks NavyLCDR

    I thought I turned off my Samsung Overprovisioning prior to removing the software as I didn't need that.
    I will reinstall the software from samsung then remove if I can.
    You can also use MiniTool Partition Wizard to extend the C: drive partition into the unallocated space. It will automatically "move" the recovery partition for you.

    Best Free Partition Manager for Windows | MiniTool Partition Wizard Free

    All that manually creating space for overprovisioning does is just shrink existing partitions to allow for an unallocated reserved space to ensure that free space is available to the SSD firmware. However, on an SSD free space is free space that the firmware can use regardless of whether it is assigned to a partition or unallocated. Leaving unallocated space for overprovisioning just allows you to completely fill the partitions and still keep free space for the firmware to use. And if you are going to fill your partitions completely anyway, it's time to get a bigger SSD.
      My Computer


  6. Posts : 119
    Windows 10 Pro
    Thread Starter
       #6

    Thank you all for your help.
    I guess the whole thing about the increased boot time was a figment of my imagination.
    I will keep monitoring.
      My Computer


 

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