Fdisk

Revision as of 11:58, 19 October 2010

On Linux Machine backup current data on Micro SD-Card before using fdisk. If SD-Card is located in /dev/sde use the following fdisk command:

 fdisk /dev/sde

Detect Device Name

Replace /dev/sde by appropriate device name. df will help you to identify the device name and size of SD card. Use df to display all mounted storage devices:

 sudo df

Depending on your demands or suggestions in manual, create the number of partitions you need

Partition Ratio

The following in the ratio 3 to 1 (e.g. 4000000 blocks):

• FAT32 (3/4 of total size of SD - e.g. blocks 16-3000000)
• EXT3 (1/4 of total size of SD - e.g. blocks 3000001-4000000)

Create Partions

Use fdisk to create partitions:

 sudo fdisk /dev/sde

1. -> p Check partitions
2. -> d -> 1 Delete Partition 1 (repeat for other existing partitions)
3. -> n -> 1 -> New partition 1 (enter first and last sector)
4. -> t -> 1 -> c Set c for FAT32 (LBA)
5. -> a -> 1 Set boot flag for first partition
6. -> n -> 2 -> New partition 2 (enter first and last sector)
7. -> t -> 2 -> 83 Set type 83 for Linux partition
8. -> w Write changes
9. -> q quit fdisk

After fdisk operations, format both partitionss. If SD-Card is located in /dev/sde use the following commands (replace /dev/sde by appropriate device name:

  # mkfs.vfat -v -n and-media -F 32 /dev/sde1
  # mkfs.ext3 -v -L and-data /dev/sde2

If you are root you can remove sudo from the command.

Swap Partition

If you need a swap partition use partition type 82 for Linux Linux partition in fdisk.

-> t -> 2 -> 82 Set type 82 for Linux partition in fdisk

where 2 is the number of the swap partition (replace 2 with the appropriate partition number).

Links

• Partitioning with fdisk
• Creating a Swap Space