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# proxmox-boot-tool format <new disk's ESP>
-# proxmox-boot-tool init <new disk's ESP>
+# proxmox-boot-tool init <new disk's ESP> [grub]
----
NOTE: `ESP` stands for EFI System Partition, which is setup as partition #2 on
bootable disks setup by the {pve} installer since version 5.4. For details, see
xref:sysboot_proxmox_boot_setup[Setting up a new partition for use as synced ESP].
+NOTE: make sure to pass 'grub' as mode to `proxmox-boot-tool init` if
+`proxmox-boot-tool status` indicates your current disks are using Grub,
+especially if Secure Boot is enabled!
+
.With plain `grub`:
----