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I had installed Win7 on my SSD 128gb and wanted to add Ubuntu 12.04 LTS on it.

My Ubuntu ISO was created on an USB Stick using Yumi Multi-OS installer. So i booted from USB, selected Ubuntu and then chose the option to install Ubuntu beside Win7.

I thought that it would install my Ubuntu on the 128GB SSD and i think it did this. But my 500GB data drive seems to be affected by the installation. On Windows it shows that the data HDD is partitioned into 3 parts: 1MB, 453,68GB RAW and 11,96GB primary partition.

I dont know why the installer affected my 500GB data drive, but I cant access my files neither on Win7 nor on Ubuntu.

I'm sure that this can be fixed, but I'm pretty new at Ubuntu and couldn't find a solution on my own.

sudo parted -l


Modell: ATA M4-CT128M4SSD2 (scsi)
Festplatte  /dev/sda:  128GB
Sektorgröße (logisch/physisch): 512B/512B
Partitionstabelle: msdos

Nummer  Anfang  Ende   Größe  Typ      Dateisystem  Flags
 1      1049kB  106MB  105MB  primary  ntfs         boot
 2      106MB   128GB  128GB  primary  ntfs

Modell: ATA WDC WD5000AAJS-0 (scsi)
Festplatte  /dev/sdb:  500GB
Sektorgröße (logisch/physisch): 512B/512B
Partitionstabelle: gpt

Nummer  Anfang  Ende   Größe   Dateisystem     Name                          Flags
 1      17,4kB  134MB  134MB                   Microsoft reserved partition  msftres
 2      135MB   136MB  1049kB                                                bios_grub
 3      136MB   487GB  487GB   ext4
 4      487GB   500GB  12,8GB  linux-swap(v1)

How can I fix this issue?

I asked this question on an other forum, too. People told me, that Ubuntu deleted my 500GB HDD Date device.

But i still dont understand why this happened.

I had 2 HDD's connected with my computer:

Device1: SSD 128GB (Windows 7 installed on it, i think it should be msdos) Device 2: HDD 500GB (only data, NTFS data-system)

After booting the Ubuntu from USB stick i had 3 options how to install it: a) Install Ubuntu beside Win7 b) Delete Win7 and replace it with Ubuntu c) Other / Custom Installation.

I am a big Noob at Linux, but i thought: ok, he found my Win7 installation and he can install Ubuntu beside Win7 (on my SSD 128GB). Yes, thats what i chose.

But instead of it the isntaller deleted my 500GB HDD and replaced it with Ubuntu.

Thats not what i wanted.

But i would be thankful if somebody could give me a reason why such a mistake could happen.

Gladfully, yesterday i made a backup of 80% of my data.

share|improve this question
Your fdisk output is useless because you haven't included /dev/sda and because /dev/sdb uses GPT, which fdisk doesn't support. Please edit your question to delete the fdisk output and provide instead the output of sudo parted -l. –  Rod Smith Nov 21 '13 at 14:40

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