Hard disks
==========

The *Hard disks* page contains settings related to the emulated machine's fixed disks.

Hard disk list
--------------

All hard disks attached to the emulated system are listed, with the following information:

* **Bus:** bus the disk is attached to, as well as the disk's bus channel/ID. These can be changed through the *Bus* and *Channel*/*ID* boxes below the list.
* **File:** path to the disk image file.
* **C/H/S:** the disk's amount of cylinders, heads and sectors, respectively.
* **MB:** disk size in megabytes.

Adding a new disk
-----------------

The *New...* button opens a new window allowing you to create an existing hard disk image file.

* **File name:** where to save the disk image file. See :ref:`hardware/diskimages:Hard disk images` for a list of supported image formats.
* **Cylinders/Heads/Sectors:** CHS parameters for the disk image. These boxes control the *Size (MB)* box below.
* **Size (MB):** the disk image's size in MB. This box controls the *Cylinders*, *Heads* and *Sectors* boxes above. There are limits to how big a hard disk image can be; see :ref:`hardware/diskimages:Hard disk size limits` for more information.
* **Bus:** bus to attach the disk to.
* **Channel**/**ID:** where to attach the disk on the selected bus. The *Channel* value for IDE has two numbers, which correspond to an IDE channel and device, respectively:

+-----+----------+------+
|Value|Channel   |Device|
+=====+==========+======+
|0:0  |Primary   |Master|
+-----+----------+------+
|0:1  |Primary   |Slave |
+-----+----------+------+
|1:0  |Secondary |Master|
+-----+----------+------+
|1:1  |Secondary |Slave |
+-----+----------+------+
|2:0  |Tertiary  |Master|
+-----+----------+------+
|2:1  |Tertiary  |Slave |
+-----+----------+------+
|3:0  |Quaternary|Master|
+-----+----------+------+
|3:1  |Quaternary|Slave |
+-----+----------+------+

Press the *OK* button to create the disk image file, or *Cancel* to close the window.

Adding an existing disk
-----------------------

The *Existing...* button opens a similar window to the *New...* button, except that it lets you select an existing disk image file. The CHS parameters are guessed from the image's file size, or the file header if the image is of a format which contains a header.

After selecting the image file and checking if the parameters are correct, select the *Bus* and *Channel*/*ID* for the hard disk and press *OK* to add it. Press *Cancel* to close the window.

Removing a disk
---------------

Select a disk on the list and press *Remove* to remove it.