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Windows 7: Two OS in one drive,,?

12 Jun 2011   #11
theog

Microsoft Community Contributor Award Recipient

ME/XP/Vista/Win7
 
 

A bit more reading.
BCDEDIT - How to Use
System Restore Points - Stop XP Dual Boot Delete - Vista Forums

Windows XP Mode - Install and Setup


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12 Jun 2011   #12
dsperber

Windows 7 Pro x64 (1), Win7 Pro X64 (2)
 
 

Quote   Quote: Originally Posted by IamLEGEND View Post
but if we installed windows seven first and then installed xp on it, then we must use some boot software like esay bcd.
Yes.

EasyBCD is an easy-to-use GUI version of BCDEdit (which is the command-line equivalent that is built into Win7), with many additional capabilities. I highly recommend it.

It actually would be fairly simple to add WinXP to an existing Win7 environment, if you had a second hard drive. Then you could simply temporarily change the BIOS to point to the second hard drive as "hard disk #1", and do a normal WinXP install to a partition on that second hard drive.

Then you'd change the BIOS back to point to the original hard drive (where Win7 and the "system reserved" partition live) as "hard disk #1" and boot back to Win7. Then you'd run EasyBCD to add the WinXP partition on that other second drive as an additional bootable Windows, and you're finished!!! You've now just added a newly installed WinXP as a second bootable Windows to your existing Win7 environment.


It's a bit more tricky if you want to add WinXP as a second Windows using another partition on the same hard drive as you've already got Win7 and the "system reserved" partition. Not impossible, just more complex.

No question having an available partition on a second hard drive for your WinXP target partition is much more straightforward and simple... and almost trivial with EasyBCD, after you get WinXP installed onto that second drive.

And again, all this additional complexity is tied to the fact that you're doing things in the reverse order from what is normally the recommended approach... namely doing your Win7 install first and then adding WinXP second. Do it in the normal recommended way (with WinXP first and Win7 second) and you really don't have to think about anything... no matter whether you have one hard drive or two hard drives. The Win7 installer does all the right things automatically, when it discovers the pre-existence of an installed WinXP and you indicate what partition (on what hard drive) you'd like to now install Win7 to.
My System SpecsSystem Spec
12 Jun 2011   #13
IamLEGEND

Windows 7 SP1 Ultimate x64
 
 

out of curiosity,, tell me one thing, if we are try to install xp in C: drive, and then install seven on C: without formatting C: drive, then is it possible to have a dual boot menu.?
if dual boot menu not appear, and windows seven launch, then could we manage the boot manager with Easybcd to force it to appear dual boot menu..?
My System SpecsSystem Spec
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12 Jun 2011   #14
mickey megabyte

ultimate 64 sp1
 
 

no, that will not work. i don't know exactly what will happen, but there will be problems!

if you want to have two operating systems, you must have them on different partitions.
My System SpecsSystem Spec
12 Jun 2011   #15
dsperber

Windows 7 Pro x64 (1), Win7 Pro X64 (2)
 
 

Quote   Quote: Originally Posted by IamLEGEND View Post
out of curiosity,, tell me one thing, if we are try to install xp in C: drive, and then install seven on C: without formatting C: drive, then is it possible to have a dual boot menu.?
To clarify... when you install XP, the partition it is installed to names itself C when you boot to it. It's a particular physical partition on some drive, but when WinXP comes up that partition is lettered C.

When you install Win7 on a second partition, and then you boot to Win7, once again THAT particular physical partition is lettered C. It's a physically different partition than the WinXP partition, but they both are logically named C from their own perspective.

They are not the same C... they are two different partitions. But from their own point of view, their own boot/system partition is simply assigned the letter C. The two Windows OS's are not installed into the same physical partition... they are installed into two different physical partitions. But the assignment of drive letter C to the OS boot partition is simply a logical process that occurs at boot time, by each Windows OS.

The boot manager menu will show two lines, one for each Windows. There's no drive letter shown... just the logical name (e.g. WinXP or Windows 7). Internally, the menu item for each OS actually contains both (a) hard drive identification number, and (b) partition number on that hard drive. Once that particular Windows is selected by you and the boot manager process completes, the specific Windows you boot to simply assigns drive letter C to that particular partition.

But again... the WinXP C is NOT THE SAME PARTITION as the Win7 C.


Quote:
if dual boot menu not appear, and windows seven launch, then could we manage the boot manager with Easybcd to force it to appear dual boot menu..?
Correct. EasyBCD can be used to "add" the boot manager menu process to an existing one-Windows environment where boot manager would normally not present a menu.

In other words, in a one-Windows environment (e.g. Win7 only), there's no need to present a menu for you to choose which Windows you want to boot to. There's only one installed Windows, namely Win7.

But if you do now have two Windows (because you did what I described earlier, and actually installed WinXP as a second Windows somewhere on some partition), then you simply have to run EasyBCD and "add" the additional bootable WinXP partition and now boot manager will appear any time you boot, and you'll choose which Windows you want to really boot to from that newly updated menu.
My System SpecsSystem Spec
12 Jun 2011   #16
IamLEGEND

Windows 7 SP1 Ultimate x64
 
 

Quote   Quote: Originally Posted by dsperber View Post

Quote:
if dual boot menu not appear, and windows seven launch, then could we manage the boot manager with Easybcd to force it to appear dual boot menu..?

Correct. EasyBCD can be used to "add" the boot manager menu process to an existing one-Windows environment where boot manager would normally not present a menu.

In other words, in a one-Windows environment (e.g. Win7 only), there's no need to present a menu for you to choose which Windows you want to boot to. There's only one installed Windows, namely Win7.

But if you do now have two Windows (because you did what I described earlier, and actually installed WinXP as a second Windows somewhere on some partition), then you simply have to run EasyBCD and "add" the additional bootable WinXP partition and now boot manager will appear any time you boot, and you'll choose which Windows you want to really boot to from that newly updated menu.
I think you did not get me,, I m saying that if we install 2 OS in one partition, and only one windows is launched, then can we able to modify the boot manger with easybcd to force launching two OS.?
is it possible...?
My System SpecsSystem Spec
12 Jun 2011   #17
mickey megabyte

ultimate 64 sp1
 
 

i think you did not get me

Quote   Quote: Originally Posted by mickey megabyte View Post
no, that will not work. i don't know exactly what will happen, but there will be problems!

if you want to have two operating systems, you must have them on different partitions.
My System SpecsSystem Spec
12 Jun 2011   #18
IamLEGEND

Windows 7 SP1 Ultimate x64
 
 

Quote   Quote: Originally Posted by mickey megabyte View Post
i think you did not get me
.
sorry for my English..(if something I say wrong)
.
Quote   Quote: Originally Posted by mickey megabyte View Post
no, that will not work. i don't know exactly what will happen, but there will be problems!
this is I wanted to know that what will happens..
My System SpecsSystem Spec
12 Jun 2011   #19
dsperber

Windows 7 Pro x64 (1), Win7 Pro X64 (2)
 
 

Quote   Quote: Originally Posted by IamLEGEND View Post
I think you did not get me,
You're right... I didn't quite understand what you were asking. I thought I had figured it out, but apparently not.


Quote:
I m saying that if we install 2 OS in one partition, and only one windows is launched, then can we able to modify the boot manger with easybcd to force launching two OS.?
is it possible...?
As has been already stated, you CANNOT INSTALL TWO WINDOWS OS'S IN A SINGLE PARTITION. That's simply impossible.

Actually, when you install Win7 into an environment in which WinXP already exists, you have two options:

(a) upgrade your WinXP partition to now be Win7. Existing programs and settings are migrated to the new Win7 environment, etc., and you no longer have WinXP when the installation process completes. You will simply end up with just Win7 in the same physical partition in which WinXP previously existed, replacing that old WinXP. There will be no more WinXP.

(b) ADD a Win7 system into a SECOND PARTITION, producing a multi-boot two-Windows setup. That's where boot manager comes into play, and you will be able to choose either your old untouched existing WinXP, or your newly installed "virgin" Win7 system with none of your WinXP programs or settings at all. Pure Microsoft vanilla starter Win7... from scratch, out of the box.

It is simply NOT possible at all to install Win7 into the same physical partition as WinXP currently lives, and end up with two separate bootable Windows systems. Simply impossible.
My System SpecsSystem Spec
12 Jun 2011   #20
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate
 
 

Quote   Quote: Originally Posted by IamLEGEND View Post
out of curiosity,, tell me one thing, if we are try to install xp in C: drive, and then install seven on C: without formatting C: drive, then is it possible to have a dual boot menu.?
if dual boot menu not appear, and windows seven launch, then could we manage the boot manager with Easybcd to force it to appear dual boot menu..?

There cannot be 2 separate Windows Operating Systems on the same partition.
My System SpecsSystem Spec
Reply

 Two OS in one drive,,?




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