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Windows 7: Boot Drive Only Successfully Boots with Second Hard Drive


15 Apr 2012   #1

W7 64
 
 
Boot Drive Only Successfully Boots with Second Hard Drive

Although my Disk 0 (see attached Computer Management jpg) displays itself as the boot drive, it will not boot up alone. I must power up a second drive (labeled Disk 1) to view Disk 0. I understand the need to use the BIOS to point to the Boot Drive and Boot Priority, and have done this each time.

  1. This is not a BSOD issue.
  2. I have multiple Windows 7 operating systems installed. One on Disk 0 and one on Disk 1. I am offered a choice when booting from Disk 1, to choose operating systems and I select the one located on Disk 0. (Verified by the jpg file.)
  3. But with only the Disk 0 receiving power, I get a message that the drive will not boot unless I insert a bootable disk.
  4. However, with both the Disk 0 and the Disk 1 drive receiving power, I manually change the BIOS to point to Disk 1 to allow both drives to be viewed successfully.
I would just like to use Disk 0, but since it will not boot by itself, (even though it shows it is the bootable drive), I must be doing something wrong. How can I use only Disk 0?



Attached Thumbnails
Boot Drive Only Successfully Boots with Second  Hard Drive-4-15-2012-12-48-29-pm.jpg  
My System SpecsSystem Spec
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15 Apr 2012   #2

Windows 8 Core X64
 
 

This sounds like a problem for gregrocker

The 100MB partition on Disk 1 is marked as System so that's where the boot files are located and why you need to to boot.

I believe you can fix this by removing Disk 1, booting your Win 7 DVD and running Startup Repair up to 3 times: Startup Repair - Run 3 Separate Times
My System SpecsSystem Spec
15 Apr 2012   #3
Microsoft MVP

 

The Boot flag only means which is currently booted. System flag is where the boot files are loaded.

Do as Rich suggests above but mark C Active first so the installer Repair function will know where to write the System Boot files, then set Disk0 first to boot in BIOS setup after unplugging Disk1.

Within 3 separate Startup Repairs from DVD or System Repair Disk Disk0 should boot on its own.

Power down to plug back in the other HD and boot it when needed using the one-time BIOS Boot Menu key given on first boot screen. This keeps the HD"s independent to come and go as you please. Remove any unneeded Boot menu entries in EasyBCD Edit OS Menu tab.
My System SpecsSystem Spec
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15 Apr 2012   #4
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

You can also just move the bootmgr from disk1 to C with 3 clicks: Bootmgr - Move to C:\ with EasyBCD
My System SpecsSystem Spec
15 Apr 2012   #5
Microsoft MVP

 

Quote   Quote: Originally Posted by whs View Post
You can also just move the bootmgr from disk1 to C with 3 clicks: Bootmgr - Move to C:\ with EasyBCD
System Reserved will lose the ability to boot the OS on Disk1.

This will also not add System Recovery Options to the F8 Advanced Boot Options on Disk0.

The advantage of having separate HD's is to boot either via the BIOS Boot order or one-time BIOS Boot Menu key. This keeps them independent to come and go as you please.

However if you don't like this arrangement you can install EasyBCD to the Primary HD to add the other and they should both retain independent System boot files if you repair it as suggested first.
My System SpecsSystem Spec
15 Apr 2012   #6
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Hmm, I did not see an OS on disk1.
My System SpecsSystem Spec
16 Apr 2012   #7

W7 64
 
 

Success! Using both hard drives, I first made my C: drive on Disk 0 as Active (as described above). I then disconnected Disk 1 and tried the boot sequence with only Disk 0 (expecting to use my Repair Disk three times). But I received the error: "Bootmgr is missing. Press Cntl-Alt-Del to restart" so I was prevented from doing a Startup Repair. There indeed was no Bootmgr on Disk 0. So I transferred the boot files from Disk 1 by using EasyBCD as described at the link. It was not necessary for me to use Startup Repair after transferring Bootmgr. What's the explanation then?
My System SpecsSystem Spec
16 Apr 2012   #8
Microsoft MVP

 

Bootmgr is missing error is to be expected when booting after changing the Active flag.

As stated you need to boot into the Windows 7 DVD or Repair CD to run Startup Repairs x3.

Booting into a disk is not affected by Bootmgr is missing at all which refers only to the HD set first to boot which still needs System boot files.

Moving Boot files using EasyBCD is fine but as I said earlier you may not be able to boot the other HD now and it does not write the System Recovery Options to F8 Advanced Boot TOols menu, which is one of the things Startup Repair does.

You can however add the other OS if still needed using EasyBCD.
My System SpecsSystem Spec
16 Apr 2012   #9
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Here is the difference. The procedure that Greg describes is the pure way. The way I describe is the fast way.

It will depend how you are setup. I make images all the time and therefore do not really need access to all these other functions. So it is a matter of personal preference and setup.
My System SpecsSystem Spec
16 Apr 2012   #10

W7 64
 
 

Ahhh. I had wrongly expected that I would be given a choice to boot from the Repair Disk (which I had already inserted in the drive). I should have instead changed the BIOS to force it to boot from the DVD disk. My mistake. I haven't tested to see if a separate boot function is lost on the other drive, but no harm is done because I will use that drive for data anyway. Many thanks for the solutions.
My System SpecsSystem Spec
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 Boot Drive Only Successfully Boots with Second Hard Drive




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