There are several methods to move Linux to another hard disk on the same server.
But I used Unix dump / restore utility to do this …

Step1. First you need a new hard disk partition in the same way as with previous unit (Linux is running on). I usually use the utility ‘fdisk‘.
Let us suppose that the old drive is /dev/sda and a new one is /dev/sdb.
To view the partition table hda please run ‘fdisk-l  /dev/ sda “which should show something like this:

[email protected]:~# fdisk -l /dev/sda

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0007384e

Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        9330    74936320   83  Linux
/dev/sda2            9330        9730     3212289    5  Extended
/dev/sda5            9330        9730     3212288   82  Linux swap

Step2. After this run ‘fdisk /dev/sdb’ and make the same partitions at it. Interactive mode of fdisk utility is well documented and is very intuitive, so I don’t think it would be difficult to perform partitioning.

After this is done, we should make new filesystems at partitions we’ve created:

mkfs -t ext3 /dev/sdb1
mkswap /dev/sdb2

Step3. Now new hard drive preparation is finished and we can proceed with moving Linux to it. Mount new filesystem and change directory to it:

mount /dev/hdb1 /mnt/hdb1
cd /mnt/hdb1

Step4.  Perform moving by command:

dump -0uan -f – / | restore -r -f

When dump/restore procedures are done we should install boot loader to new HDD. Run ‘grub’ utility and execute in it’s console:

root (hd1, 0)
setup (hd1)
quit

Enjoy.

In this post i will show you what steps  I followed to adapt RAID1 on an existing installation of Debian Squeeze.

Step1. Make sure you have the following packages are installed:

apt-get update && apt-get upgrade
apt-get install mdadm rsync initramfs-tools grub-pc

Step2.  Partitioning the new drive:

First connect the new drive (/dev/sdb) and boot into your sistem.
Then use fdisk to display the partition informations for the existing drive (/dev/sda).

[email protected]:~# fdisk -l /dev/sda

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0007384e

Device Boot Start End Blocks Id System
/dev/sda1 * 1 9330 74936320 83 Linux
/dev/sda2 9330 9730 3212289 5 Extended
/dev/sda5 9330 9730 3212288 82 Linux swap / Solaris

Now create partitions of the same size on the new drive.

NOTE:If the new drive is bigger leave the rest of the drive unpartitioned.

Step3. Create new degraded RAID1 arrays:

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