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4TB Windows Server Boot Drive MBR vs GPT

Discussion in 'Windows Server, Hyper-V Virtualization' started by Larson, Sep 12, 2017.

  1. Larson

    Larson Member

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    Hi all,

    Can someone help me on this? I currently have a lenovo ThinkServer TS140 running Windows Server 2012 R2 Essentials on a 2x1TB HDDs RAID1 volume. The RAID1 volume is MBR and is partitioned into two partitions (1 for OS, 1 for data), but I want to replace the entire volume with larger drives (2x4TB HDDs). When I do this, I'll effectively have a 4TB boot drive. The TS140 has a UEFI Bios, but the volume is MBR. Will that work, or does the volume have to be GPT in order to boot from it? Bottom line, I guess: With an UEFI Bios, can you boot from a 4TB MBR volume?
     
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  2. i386

    i386 Active Member

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    You will need for everything over 2tb gpt (mbr size limit = (2^32) * sector size (most hdds use or emulate 512 byte sectors))
     
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  3. cesmith9999

    cesmith9999 Well-Known Member

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    I do not recommend doing a booting GPT system. it causes too many issues if you want to P2V the system .

    just giving you warning. I would recommend a separate OS and data drive if you can do that in that system.

    Chris
     
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  4. Larson

    Larson Member

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    Hi Chris, does "P2V" mean partition into two volumes? Thanks.
     
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  5. i386

    i386 Active Member

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    Physical to virtual
     
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  6. Larson

    Larson Member

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    Oh, okay. Well, it's a real simple setup, just two partitions (1 for OS, 1 for Data). It's Server 2012 R2 Essentials which is just being used for a file server, client computer backups, and a few applications (accounting program, etc.). Do you think a GPT boot drive would be okay for that, or still better not to do?
     
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  7. cesmith9999

    cesmith9999 Well-Known Member

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    GPT is great for data drives. not so much unless you are building a secure environment.

    You are not planning on any raid for the data?

    Chris
     
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  8. Larson

    Larson Member

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    The system/OS/boot/data drive is all one 1TB HDD with C: (OS) and D: (data) partitions. So everything is on RAID1. It's not an ideal setup. I'd rather have a separate OS drive and Data drive, but I'm just working with what came before me. Trying to increase storage space with minimal downtime.
     
    #7
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