Using SSD and HDD but Differing Partition Styles


  1. Posts : 283
    Windows 10 Pro 64-Bit
       #1

    Using SSD and HDD but Differing Partition Styles


    The setup example is this: windows 10 on SSD (MBR Partition Style), Secondary HDD for Programs/Other-Stuff (GPT Partition-Style), I install programs onto the secondary drive (steam, VLC Media Player, etc...)

    Will windows 10, at any point in the time I install updates or have to do repair installs for whatever reason, start having problems recognizing I got stuff installed on a GPT partitioned HDD, necessitating a need to convert the hard drive to an MBR partition table/style, or can I have the setup as an MBR/GPT or a GPT/MBR with no problems, or should I just stick with both storage drives being either MBR or GPT
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  2. hsehestedt's Avatar
    Posts : 2,211
    Windows 10 Pro, 20H2
       #2

    It's fine to have both MBR and GPT disks. Normally, if you install Windows on a BIOS based system then the boot disk will be MBR because only UEFI based systems can boot from a GPT partition. However, other partitions can still be GPT.

    Here is an article that does a good job explaining the differences:

    What’s the Difference Between GPT and MBR When Partitioning a Drive?
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  3. NavyLCDR's Avatar
    Posts : 15,582
    Windows 10 Pro
       #3

    Partitions are neither GPT nor MBR. Only physical drives are MBR or GPT. There is no issue mixing GPT and MBR drives in a system. But it is not possible to mix GPT and MBR partitions on a drive because MBR v. GPT does not apply to partitions.
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  4. JohnBurns's Avatar
    Posts : 509
    Windows 10 Version 1909 (Build 18363.815
       #4

    Just curious, what backup program are you using with this type setup?
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  5. Berton's Avatar
    Posts : 10,723
    Win10 Pro Versions 2004 and 2009/20H2, Win10 Pro IP_Dev, Win10 Home 1909
       #5

    NavyLCDR said:
    Partitions are neither GPT nor MBR. Only physical drives are MBR or GPT. There is no issue mixing GPT and MBR drives in a system. But it is not possible to mix GPT and MBR partitions on a drive because MBR v. GPT does not apply to partitions.
    To add to this, according to DiskPart my Internal 1TB HDD with a 150GB boot/system partition and 780GB Data partition is GPT. I also have an External USB 4TB HDD that is GPT and an External USB 2TB HDD that is not GPT. The mix of the drives is causing no problems.
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  6. Posts : 283
    Windows 10 Pro 64-Bit
    Thread Starter
       #6

    then that is all I need, because at the time of this post I am now on an SSD/HDD setup, ssd holds the OS, HDD holds everything else, and the backup system I use is macrium reflect in cases of serious stuff

    thanks everyone, this topic is now considered solved
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  7. hsehestedt's Avatar
    Posts : 2,211
    Windows 10 Pro, 20H2
       #7

    @NavyLCDR is absolutely correct. In my post I initially referenced "MBR and GPT disks" but after that I referenced GPT partitions. I should have been clearer and said "partitions on GPT disks".

    Sorry for the confusion and thanks for the correction, @NavyLCDR.
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