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Windows 7: Newly formatted secondary harddrive shows 128mb unformatted partition

26 Oct 2013   #1

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
Newly formatted secondary harddrive shows 128mb unformatted partition


I'm running a primary SSD with the W7/64. I installed with ONLY that SSD in the computer. (I've learned.)

Then, after a few reboots and updates, I installed a 1tb WD hard drive. It was a new OEM drive. I did a long format, then a chkdsk.

After a few reboots (and reading some OUTSTANDING tutorials on this site), I moved my USERS folders over to the harddrive. ("D" drive.)

Upon opening Macrium Reflect to perform a backup, I see that my hard drive (D) has a 128MB partition, unformatted, but full. (That does not show up in W7's disk management.)

As expected, my "C" drive, the SSD, has a 100MB System Reserved partition. (As I want.)

What is this 128MB unformatted partition used for? (NTFS file system.) Is this where the file system stores the access table?


My System SpecsSystem Spec
26 Oct 2013   #2

Windows 7 Home Premium 32 bit

Did you format your 1TB WD drive to GPT? If so it will create a 128MB reserved partition called MSR MicroSoft Reserved. See my post External HDD suddenly requires formatting, read as RAW instead of ntfs

For drives less than 2TB, I would still say it would be better to go with the known MBR format rather than GPT if that option exists.
My System SpecsSystem Spec
26 Oct 2013   #3

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1


You are correct. I formatted it as GPT.

I'll look at your post, linked above.

Thank you.

My System SpecsSystem Spec


 Newly formatted secondary harddrive shows 128mb unformatted partition

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