Ok, I will describe each & every step I performed.
First the problem:
A few days ago, my laptop refused to boot. It showed me automatic repair, but the repair was unable to solve the problem. So I checked the log file. The log file said that the bootloader was not found.
Since I was in a hurry for my work. I booted an Ubuntu live CD & tried to write the bootloader
I ran a command in ubuntu Sudo dd if=/usr/syslinux/mbr.bin of=/dev/sda
What it did is make situations worse.
This command deleted my system_drv partition which was the boot partition.
So I ran testdisk & recovered that partition.
In testdisk I selected Intel type partitions for recovery.
Though the partition was recovered it wiped data from the rest of my partitions. Now in my laptop there is a LENOVO partition containing the lenovo drivers, SYSTEM_DRV (boot) & some other recovery partitions. Two partitions remain one was Data & other is Windows8_OS.
When I did my first recovery should I have selected efi/gpt instead of Intel? & if yes is it possible to recover now or I have lost my data?
My final questions are:
Should I try to recover those partitions using testdisk? Or Is There Any Other Reliable Software? Or Is There Any Alternate Way? Or should I just handover to Lenovo for repairing the drive.
Though the data is gone I have checked in Gpart & confirmed that the partitions are still intact & I assume the partition table is also intact. The partitions still showup in Gpart but with an red exclamation & no used space just the size of the partition.
Please suggest a solution I am very worried coz my data is too important & want to restore my laptop as it was. Please I am in need of help.