Yrurtj

I have two SSDs, one is for my Windows 7, and one is for testing and tweaking it (like installing Linux, or other operating systems...).

I've already installed Windows 7 on the first SSD,
and I tried to install Debian distribution on the second SSD, the installation was successful.

But the problem is that I installed something called boot loader into first SSD (which Windows 7 is installed), so if I run second SSD, nothing happens and if I run the first SSD, automatically Debian boot loader runs, and what thing fundamentally makes me annoying is that there is no option for Windows, just for Debian. (I thought I can use both of the choices if I install the boot loader into any SSD.)

If I open the SSD which Win installed, I can see those files and folders.

[Folder] Boot

[Folder] Documents and Settings

[Folder] Intel

[Folder] Perflogs

[Folder] ProgramData

[Folder] Program files

[Folder] Program files (x86)

[Folder] Recovery

[Folder] $Recycle.Bin

[Folder] System Volume Information

[Folder] Users

[Folder] Windows

[File] bootmgr

[File] BOOTSECT.BAK

[File] hiberfil.sys

[File] pagefile.sys

I think those all folders & files have relationships to Windows OS, but actually I don't know. (I just googled it.)

Can I change the directory of the boot loader or delete it?
What can I do?

It depends on which boot-loader was installed. If its a standard Debian install it should be GRUB2.

Boot the computer with all disks containing bootable installations attached and powered.

you need to open Root Terminal application to open a terminal as root, then enter these commands:

apt-get update

apt-get install os-prober

if os-prober package is already installed, apt will let you know, without doing any changes to the system.

Then edit /etc/default/grub and make sure you have a line like

GRUB_DISABLE_OS_PROBER=false

you can edit the file using a GUI text editor like Gedit, or a CLI Editor, such as Vim or Nano.

Using Gedit:

gksu gedit /etc/default/grub

You need to close gedit to be able to use the terminal again

Using Nano

nano /etc/default/grub

I don't recommend using vim if you're a beginner, it takes some time to get used to it's operation modes and interface.

Once you're done with editing the file, if necessary, enter this command

update-grub

Note: You can skip the file editing process on your first try, but if that doesn't work you'll need to do it, then retry update-grub command.

You could:

• start the computer with both disks attached,


• boot into (your currently only choice) Debian


• run update-grub
  

It should detect Windows on the first Disk, and add an entry to the boot-loader choices.

And you could then optionally install grub also to the other disk boot sector by running grub-install /dev/sdb

sdb is what I assume to be the device node for the second attached disk, else try sda