Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

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

Thread Tools

Similar help and support threads
Thread Forum
250GB hard drive newly formatted only showing 26.9GB
I'm not sure if the hard drive is failing, its an older IDE drive. I just formatted the drive and disk manager only shows it with 26.9GB and no other unallocated space. Is there any way to reclaim the lost space or is this a typical sign of a drive on its last legs?
Hardware & Devices
IRQL_Not_Less_Or_Equal on newly formatted PC
I formatted and reinstalled Windows 7 Home Premium on my custom build yesterday and have just received an 'IRQL_Not_Less_Or_Equal' BSOD, I installed all of the Windows updates yesterday (about 2 or 3 lots of updates) and when I booted up my PC this morning there was another 15 or so updates to be...
BSOD Help and Support
Newly Formatted C, This installation disc isn't compatible No Boot!
Hi. My brother is trying to install Win 7 Pro 64 bit onto a HD previously containing XP. the drive has been formatted using Partition Wizard and the HD had a small unallocated partition which was merged to make one drive. On inserting and trying to boot from the Windows 7 CD the BIOS shows to...
Installation & Setup
win7 64 BSOD on start every time + showing OS partition as unformatted
Hello i am getting a BSOD right at startup after windows logo and thats as far as it gets then restarts. The Error is Unmountable_boot_volume (0xFFFFFA80029F0AD0, 0xFFFFFFFFC000009C, 0x0000000000000000, 0x0000000000000000 I throw the hard drive in another system and it shows the OS...
BSOD Help and Support
Flash drive suddenly shows as unformatted on win 7
hi, Basically, i want to transfer my music collection to my usb drive, but when i do so it transfers about 70% and then it says "could not find this item - this item is no longer located in...." it says that the item is not longer located on my usb... but i was trying to transfer it from my pc...
General Discussion

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 21:29.
Twitter Facebook