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: can i run old hard disk normally without losing any data?

18 Nov 2014   #1

Windows 7 Ultimate x64
can i run old hard disk normally without losing any data?


i have on my desktop two hard disk when i install windows on the new hard disk then i put the old hard disk

and new hard disk too then i turn on the pc

i go to partition of windows on old hard disk and make format it and format system reserved partition

then i go to Disk Management and make delete to system reserved partition then the i restart the pc but it

don not open in any way but when i remove the old hard disk the pc open normally

i try to install windows on the old hard disk but i can not do this but in doss i show it by name and the same

size too . i try to added it by usb connection but no way success

the problem can i running the old hard disk normally without i loss any data because i had more important

data on it

if any one had any idea please help me
My System SpecsSystem Spec
18 Nov 2014   #2

Windows 10 Pro x64

If you formatted the old drive then the data is gone.

If you just installed windows on a new drive, why did you install it again on the old drive ?

Post a shot of disk management.
My System SpecsSystem Spec
18 Nov 2014   #3

Windows 7 ultimate 64-bit

Add is right. Unless you remembered to make a backup of any important files; then the data is most likely gone because whenever you format a disk it completely wipes the disk clean in order to reinstall the operating system therefore deleting any data.
My System SpecsSystem Spec

18 Nov 2014   #4
Microsoft MVP


It sounds like when you plug in the old HD it is Primary hard drive set first to boot in BIOS. Only when you unplug it does it allow the newer HD to boot first successfully.

So boot into BIOS setup and set the new HD as Primary HD, then set that as first device to boot. Save changes and exit.

Then post a screenshot of Disk Management - Post a Screen Capture Image
with both drives attached if possible, or if not then just the bootable drive.

Does your bootable flash stick work for sure to install to another PC? If not you may need to write another. If you have a UEFI BIOS it also requires using Option one of UEFI Bootable USB Flash Drive - Create in Windows and boot the stick as a UEFI device. You will know if you have a UEFI BIOS because in Disk Mgmt it will have an EFI System partition as the boot partition.

If not then you should unplug the new HD, reboot and tap the one-time BIOS Boot menu key to trigger the stick to boot, during the install delete all partitions not needed to create a new partition for install using the Drive Options pictured in Steps 7 and 8 of Clean Install Windows 7.

Let us know how this goes. Reply to each step and question given.
My System SpecsSystem Spec
19 Nov 2014   #5
Mark Phelps

Win7 Pro 32-bit, Win8 Pro 32-bit

whenever you format a disk it completely wipes the disk clean
Actually, NO, reformatting does not "wipe" the disk. The contents are still there. If they were not, data recovery apps would never work.

To "wipe a disk clean", as in actually removing all the prior content, you have to use a utility that actually "wipes" the disk.

To the OP -- if you want to try to recover the former files and folders from the reformatted disk, try using a data recovery app like "Recuva".
My System SpecsSystem Spec
19 Nov 2014   #6

Windows 10 Pro x64

Yep, the data just gets written over.

Partition Wizard may also work.

MiniTool Partition Manager Software for Windows PC and Server
My System SpecsSystem Spec

Thread Tools

Similar help and support threads
Thread Forum
losing data after check disk
After copying my win7 on ssd drive i perform install of Ubuntu, after login on ubuntu i have trouble to view data on my ntfs hard disk drive, first it was visible and then it show that a folder is empty. Before booting on win 7, check disk started to perform some fixes, after that i lose on one...
General Discussion
How do I partition a hard drive without losing data?
Hi, My external hard drive (WD Passport) is not showing up on my computer. I think it must have disconnected from my laptop before it had finished writing the files. I can find it in 'disk management, hard drives' but its not showing up in partition managers. See pics below. I really need the...
Hardware & Devices
Boot disk failed. How best to rebuild PC without losing user data?
My PC has just crashed and won't reboot. It looks like there is an error on the boot disk and given the past history of this PC and this drive I don't think it's worth trying to recover it. The PC was built with an 80Gb boot disk with windows installed and a 1.5Tb data disk with the user...
Installation & Setup
How to upgrade hard drive without losing data
hello, I have an HP s5-1200z computer with Windows 7 Home Premium 64 Bit. I have been reading and trying different things for the last three days trying to upgrade my hard drive. The computer came with a 500GB and I want to use my 1TB instead. The first thing that I did was create a system...
Installation & Setup
How to install hard disk without losing data in it?
I want to clean install Windows 7 64-bit and I have Windows XP 32-bit. I have two hard disks and someone said me one of my hard disks is system disk and another one is just plugged into my compuer. That person also said that I'll have to remove my hard disk with data in it but how to install it...
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 22:41.
Twitter Facebook