Talos comes with a reserved block device with three partitions:

  • an EFI System Partition (ESP)
  • a ROOT partition mounted as read-only that contains the minimal set of binaries to operate system services
  • and a DATA partion that is mounted as read/write at /var/run

These partitions are reserved and cannot be modified. The one exception to this is that the DATA partition will be resized automatically in the init process to the maximum size possible. Managing any other block device can be done via the blockd service.