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I am using Windows Server 2008 R2. I have two hard disks attached. The second hard disk contained two partitions (E and F). While running the Windows Server Backup I gave the path to backup the primary partition (C) on a schedule to one of the above partitions.

The backup schedule was running successfully until today I manually run the scheduled backup. I was shocked to see the message "Formatting..". Suddenly both the partitions of the other drive were lost. I could see Windows Server Backup merged the two partitions and created a dedicated backup partition.

Is there a way to recover those lost partitions?

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Can you restore them from your backup or did they house all your backups? – Robert Feb 20 '12 at 7:10
@Robert There were no backups but it contained some old files. Windows Server Backup automatically formatted the two partitions and merged them. It also made it a permanent backup device. That hard drive is now not visible in My Computer altogether. – RPK Feb 20 '12 at 7:18

The partitions were deleted and reformatted. You'll have to restore from backup or use data recovery software. There's no easy "oops" button to click for this one.

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