Sstrhsrtj

I've got a partition P1 (which contains my Linux OS) on a drive A.

I've just gotten a completely new drive B (that is larger than partition P1 AND the entire drive A).

I'd like to copy across the partition from drive A to drive B, and possible resize it later on.

Can this be done with dd? I could easily create a new parition table on drive B, and just cp the files across - but this seems like it might be slightly slower due to the filesystem overhead.

Output of `parted --list`:

It would be the partition 4 that I want to copy to another drive.

Model: ATA Samsung SSD 850 (scsi)

Disk /dev/sdb: 250GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

Disk Flags: 



Number  Start   End     Size    File system  Name                  Flags

 1      17.4kB  1049kB  1031kB               BIOS boot partition   bios_grub

 2      1049kB  1074MB  1073MB  fat32        EFI System            boot, esp

 3      1075MB  183GB   181GB   ext4         Linux filesystem

 4      183GB   250GB   67.5GB  ext4         Basic data partition

Please ignore any reference to the boot drive / functionality (which I'll worry about later on) - keeps this question concise.

Yes ,that's what dd is for. Assuming:

• 
  sxb is the drive to copy from


• 
  sxc is the drive to copy to


• 
  sxb4 is the fourth partition on the second drive that you want to copy from


• 
  sxc1 is the partition you've created to be of equal size to sxb4
  

do :

    parted /dev/sxc

    GNU Parted 3.2

    Using /dev/sxc

    Welcome to GNU Parted! Type 'help' to view a list of commands.

    (parted) mklabel GPT

    Warning: The existing disk label on /dev/sxc will be destroyed and all data on this disk will be lost. Do you want to continue?

    Yes/No? Yes

    (parted) mkpart primary 0.0 67.5GB

    (parted) quit



    dd if=/dev/sxb4 of=/dev/sxc1 bs=16M

As that will duplicate the UUID of the partition, in order to change the UUID of the new partition (make sure the partition is not mounted) run the following:

e2fsck -f /dev/sxc1

tune2fs /dev/sxc1 -U random

if sxbis an old drive and you expect it to have read errors, use ddrescue instead.

_{Note: as dd is known as disk destroyer, and creating a partition table is dangerous, not putting the exact command in the above as some random idiot on the Internet might see this question and copy-paste the codez without understanding what it does...}