Reordering Disk Partition Tables

How I use “sfdisk” to reorder disk partition tables

1. Backup existing partition table

sfdisk -d /dev/sda > sda.bkp

2. Then edit sda.bkp changing ONLY the lines order and partition numbers

For Example:

From

label: dos
label-id: 0xdb6d01ef
device: /dev/sda
unit: sectors

/dev/sda1 : start=  1026048, size=975747120, Id=83
/dev/sda2 : start=     2048, size=   204800, Id=83
/dev/sda3 : start=   206848, size=   819200, Id= b
/dev/sda4 : start=        0, size=        0, Id= 0

To

label: dos
label-id: 0xdb6d01ef
device: /dev/sda
unit: sectors

/dev/sda1 : start=     2048, size=   204800, Id=83
/dev/sda2 : start=   206848, size=   819200, Id= b
/dev/sda3 : start=  1026048, size=975747120, Id=83
/dev/sda4 : start=        0, size=        0, Id= 0

3. Then write the changes back to disk

sfdisk --no-reread -f /dev/sda < sda.bkp

4. Last steps

Optionally consider running “boot-repair” where appropriate.