How To Restore Partition Table on Running Linux Mint Ubuntu Debian Machine

Here is an easy way to restore things if you have the starting point and size of each partition using fdisk:

In this example we pretend that /dev/sda was wiped out, but the running system still has the info in /sys/class/block/sda

Go into each partition and record the "start" and "size"

hostdev@box /sys/class/block/sda/sda1 $ cat start
2048
hostdev@box /sys/class/block/sda/sda1 $ cat size
2097152


hostdev@box /sys/class/block/sda $ cat sda2/start
2099200
hostdev@box /sys/class/block/sda $ cat sda2/size
62914560


hostdev@box /sys/class/block/sda $ cat sda3/start
65013760
hostdev@box /sys/class/block/sda $ cat sda3/size
520923740

Now create the same 3 partitions at the same starting point and with the same size using fdisk:


Welcome to fdisk (util-linux 2.34).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table.
Created a new DOS disklabel with disk identifier 0x8e7672df.

Command (m for help): n
Partition type
   p   primary (0 primary, 0 extended, 4 free)
   e   extended (container for logical partitions)
Select (default p):

Using default response p.
Partition number (1-4, default 1):
First sector (2048-585524838, default 2048): 2048
Last sector, +/-sectors or +/-size{K,M,G,T,P} (2048-585524838, default 585524838): 2097152

Created a new partition 1 of type 'Linux' and of size 1023 MiB.

Command (m for help): n
Partition type
   p   primary (1 primary, 0 extended, 3 free)
   e   extended (container for logical partitions)
Select (default p):

Using default response p.
Partition number (2-4, default 2):
First sector (2097153-585524838, default 2099200): 2099200
Last sector, +/-sectors or +/-size{K,M,G,T,P} (2099200-585524838, default 585524838): 62914560

Created a new partition 2 of type 'Linux' and of size 29 GiB.

Command (m for help): n
Partition type
   p   primary (2 primary, 0 extended, 2 free)
   e   extended (container for logical partitions)
Select (default p):

Using default response p.
Partition number (3,4, default 3): 65013760
Value out of range.
Partition number (3,4, default 3):
First sector (2097153-585524838, default 62916608): 65013760
Last sector, +/-sectors or +/-size{K,M,G,T,P} (65013760-585524838, default 585524838): 520923740

Created a new partition 3 of type 'Linux' and of size 217.4 GiB.


Tags:

restore, partition, linux, mint, ubuntu, debian, machinehere, fdisk, dev, sda, info, sys, quot, hostdev, partitions, util, contain, dos, disklabel, disk, identifier, df, primary, extended, container, select, default, sector, sectors, mib, gib,

Latest Articles

  • Cloned VM/Server/Computer in Linux won't boot and goes to initramfs busybox Solution
  • How To Add Windows 7 8 10 11 to GRUB Boot List Dual Booting
  • How to configure OpenDKIM on Linux with Postfix and setup bind zonefile
  • Debian Ubuntu 10/11/12 Linux how to get tftpd-hpa server setup tutorial
  • efibootmgr: option requires an argument -- 'd' efibootmgr version 15 grub-install.real: error: efibootmgr failed to register the boot entry: Operation not permitted.
  • Apache Error Won't start SSL Cert Issue Solution Unable to configure verify locations for client authentication SSL Library Error: 151441510 error:0906D066:PEM routines:PEM_read_bio:bad end line SSL Library Error: 185090057 error:0B084009:x509 certif
  • Linux Debian Mint Ubuntu Bridge br0 gets random IP
  • redis requirements
  • How to kill a docker swarm
  • docker swarm silly issues
  • isc-dhcp-server dhcpd how to get longer lease
  • nvidia cannot resume from sleep Comm: nvidia-sleep.sh Tainted: Linux Ubuntu Mint Debian
  • zfs and LUKS how to recover in Linux
  • [error] (28)No space left on device: Cannot create SSLMutex Apache Solution Linux CentOS Ubuntu Debian Mint
  • Save money on bandwidth by disabling reflective rpc queries in Linux CentOS RHEL Ubuntu Debian
  • How to access a disk with bad superblock Linux Ubuntu Debian Redhat CentOS ext3 ext4
  • ImageMagick error convert solution - convert-im6.q16: cache resources exhausted
  • PTY allocation request failed on channel 0 solution
  • docker error not supported as upperdir failed to start daemon: error initializing graphdriver: driver not supported
  • Migrated Linux Ubuntu Mint not starting services due to broken /var/run and dbus - Failed to connect to bus: No such file or directory solution