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NTLDR is Missing on Clone of C Drive

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I'm running Acronis True Image Home 2011. I have been using the "Clone" option under "Tools & Utilities" "Disk Management" to backup my Win 7 C Drive and get an error on boot up when I try to use the cloned drive in the place of original C Drive. "NTLDR is missing" Why isn't the clone option making an exact clone of the original drive and boot sector?

When I have problems with my C drive becoming corrupt or other problems, I would like to be able to just swap the cloned drive for the original and boot up as normal. Would I be better off using "Disk and Partition Backup"? Thanks for any help.

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Lets do one question at a time. I am assuming that both disks are of the same size.

Let's redo the clone.
Positioning.
A. Put the new disk in its intended boot position--same location and connector as the old.
B. Old source disk in an alternate location--such as an external enclosure or usb adapter or other.
1. Boot from the Acronis Bootable media CD or Flash drive.
2. Choose the "add new disk" option and delete the existing partitions so the new disk becomes clean and unallocated.
3. Do the clone option choosing the manual option and a couple screens later choose the "as is" option as the move method.
4. After completion of cloning, shutdown and reboot with only the new disk attached.
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Question 2:
Yes, the backup and restore function can replace your cloning operation. It is much easier to keep backups current than it is to continually clone the disk. The benefits are
a. The source disk is not at risk during a restore of a backup; whereas during the cloning, the source disk very much at risk to a possible user error or power outage or program malfunction.
b. You can store multiple archives on the same storage disk.
If you choose to go this route, be sure that your backup is the disk mode backup to include all partitions (with or without drive letters) so your backup is a complete disk image.
c. Cloning is slightly faster but has no other advantages as compared to backup and restore.

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The picture below is the screen 3 or 4 in the Add new disk module. This shows how to delete the partitions off the target disk.

Same problem with NTLDR missing.
Context : I have a new PC with 2 partions on the same disk : first was used by Windows XP Pro and a second one used for Windows 7. I'm using the dual boot. SO I can choose.
To avoidd the long task to reinstall theses operating systems, I decided to make a backup using my Acronis True Image 2012 Plus Pack (with the latest build of course).

For personal reasons, I had to restore my disk. SO I ran ATI 2012 . I was done very well. When I tried to boot on Seven, no problem. But when I tried to boot on Windows XP, I have this error message : NTLDR is missing.
I tried to restore the boot mbr but the problem is still here.

Why ? How to proceed ?

Br

Yann,

With a dual boot system, it is highly possible that the wrong partition has been marked active.
On your system, the boot files are expected in the Windows XP partition, and this partition is probably not marked active.
To fix this, boot your computer on the Windows 7 installation DVD, choose install, repair computer, command prompt.
Use diskpart http://technet.microsoft.com/en-us/library/cc766465%28WS.10%29.aspx to mark the right partition active
Once done, you might have to run bootrec http://support.microsoft.com/kb/927392 to scan for bootable OSes (/ScanOS) and repair your boot records (/fixboot).