I had one external drive on which I was storing a large quantity of data; the drive is/was encrypted using gnome disk utility.  I got a second drive for redundancy and I was preparing to encrypt it.  Unfortunately, I overwrote the device book partition for the original external drive:~$ sudo dd if=/dev/urandom of=/dev/sdb115585+0 records in15584+0 records out7979008 bytes (8.0 MB) copied, 1.30506 s, 6.1 MB/sSo that is a disaster.  Curse my fat fingers.  Is there anything I can do to restore access to the drive?Some output from fdisk below.  Device mounted as sdb was the original drive, the device at sdc the new drive.Disk /dev/sdb: 2000.4 GB, 2000398839808 bytes255 heads, 63 sectors/track, 30400 cylinders, total 488378623 sectorsUnits = sectors of 1 * 4096 = 4096 bytesSector size (logical/physical): 4096 bytes / 4096 bytesI/O size (minimum/optimal): 4096 bytes / 4096 bytesDisk identifier: 0x00000000   Device Boot      Start         End      Blocks   Id  System/dev/sdb1               1   488378622  1953514488   ee  GPT...Disk /dev/sdc: 1000.2 GB, 1000204138496 bytes255 heads, 63 sectors/track, 121601 cylinders, total 1953523708 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x7e3058f0   Device Boot      Start         End      Blocks   Id  System/dev/sdc1            2048  1953519615   976758784    7  HPFS/NTFS/exFAT
Accidentally overwrote boot sector of encrypted drive: any way to recover data?
encryption;data recovery