---
name: "isohybrid"
section: "1"
platform: "linux"
package: "syslinux"
version: "6.04.pre3.r3.g05ac953c-5"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/isohybrid"
---

# isohybrid(1)

Post-process an ISO 9660 image for booting as a hard disk.

## NAME

isohybrid — Post-process an ISO 9660 image for booting as a hard disk.

## SYNOPSIS

**isohybrid** \[**OPTIONS**\] *\<boot.iso\>*

## DESCRIPTION

The **isohybrid** utility modifies an ISO 9660 image generated with mkisofs, genisoimage, or compatible utilities, to be bootable as a CD-ROM or as a hard disk.

## OPTIONS

- **-h** *\<X\>*

  Number of geometry heads (default 64)

- **-s** *\<X\>*

  Number of geometry sectors (default 32)

- **-e** *\<X\>*, **--entry** *\<X\>*

  Specify parititon entry number (1-4)

- **-o** *\<X\>*, **--offset** *\<X\>*

  Specify partition offset (default 0)

- **-t** *\<X\>*, **--type** *\<X\>*

  Specify partition type (default 0x17)

- **-i** *\<X\>*, **--id** *\<X\>*

  Specify MBR ID (default random)

- **-u**, **--uefi**

  **Build EFI bootable image**

- **-m**, **--mac**

  **Add Apple File Protocol partition table support**

- **--forcehd0**

  Assume we are laoded as disk ID 0

- **--ctrlhd0**

  Assume disk ID 0 if the Ctrl key is pressed

- **--partok**

  Allow booting from within a partition

- **-?**, **--help**

  Display help

- **-v**, **--verbose**

  Display verbose output

- **-V**, **--version**

  Display version information

## SEE ALSO

[**mkisofs**(1)](/mkisofs/1.md)