CSIM Technical Notes

Partition a disk with GPT

I need to write down the steps to partition a disk with gpart.

This is not compatible with MBR and Windows partitions.

1. Create the GPT partition scheme:

   gpart create -s GPT da2
   

2. Create a boot partition:

   gpart add -t freebsd-boot -s 512k da2
   

3. Create the root partition:

   gpart add -t freebsd-ufs -s 4g da2
   

4. Create the swap partition:

   gpart add -t freebsd-swap -s 4g da2
   

5. Create the usr partition:

   gpart add -t freebsd-ufs -s 20g da2
   

6. Create the var partition:

   gpart add -t freebsd-ufs -s 4g da2
   

7. Create other partition(s) (omit the -s to use the remaining of the disk):

   gpart add -t freebsd-ufs da2
   

8. Make the disk bootable:

   gpart bootcode -b /boot/pmbr -p /boot/gptboot -i 1 da2
   

Use gpart show da2 to see the partition table. Now you can create the file system on /dev/da2p2, /dev/da2p4, /dev/da2p5, etc.