Add a second hard disk to linux

In this tutorial we will add a second hard drive to our machine running Debian linux.

If you have just added a virtual disk, make sure you restart the virtual machine before mounting the new disk.

First we’ll have to find out what the device name is for this disk

fdisk -l

This will give you output similar to this:

Disk /dev/sda: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 2517 20217771 83 Linux
/dev/sda2 2518 2610 747022+ 5 Extended
/dev/sda5 2518 2610 746991 82 Linux swap / Solaris

Disk /dev/sdb: 32.2 GB, 32212254720 bytes
255 heads, 63 sectors/track, 3916 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdb doesn't contain a valid partition table

Next we’ll partion the new disk using the following command:

cfdisk /dev/sdb
New -> Primary -> Specify size in MB
Write
Quit

Format the new disk using the ext3 filessystem

mkfs.ext3 /dev/sdb1

Mounting the drive to a new folder

mkdir /disk2
mount -t ext3 /dev/sdb1 /disk2

You can name the folder whatever your want and place it in subfolders of another drive, for example /var/disk2

Add the new drive to fstab so that it will automatically mount when we reboot the machine. Add the following line to your fstab file (pico /etc/fstab)

/dev/sdb1 /disk2 ext3 defaults,errors=remount-ro 0 1

Now your new hard disk is mounted.

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