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fsmithred

- fsmithred
- Posts: 2101
- Joined: Wed Mar 09, 2011 9:13 pm

## Multiboot usb toram

Mon Feb 06, 2017 11:05 pm

From the refracta2usb help file.

> MULTIBOOT USB TORAM
> Using the toram option with a multiboot live-usb causes the entire
> first partition to be copied to RAM. This fails if the partition is
> larger than the available RAM. Note that this does NOT occur if you
> use an intact iso file with the findiso option (ISO_2 in main menu)
> For a live system made from unpacked iso or from live session, add
> the following to the boot command:
> toram=filesystem.squashfs
> For a live system made from intact iso and using findiso option,
> just adding 'toram' will work (ISO_2).

Here is a typical layout of a multiboot usb with both syslinux and EFI boot files.
refracta8_amd64 is from an unpacked iso.
jessie-ice has the intact iso and uses the findiso option.

Code:
  `|── boot
  │ └── grub
  │ ├── efiboot.img
  │ ├── font.pf2
  │ ├── grub.cfg
  │ ├── splash.png
  │ └── x86_64-efi
  |── efi
  │ └── boot
  │ └── bootx64.efi
  ├── jessie_ice
  │ ├── initrd.img
  │ ├── jessie-ice-template-20170103_1454.iso
  │ └── vmlinuz
  ├── refracta8_amd64
  │ ├── live
  │ │ ├── filesystem.squashfs
  │ │ ├── initrd.img
  │ │ ├── memtest
  │ │ ├── vmlinuz
  │ └── pkglist_refracta8_xfce_amd64_rc1-20160923_1334
  │ └── package_list
  └── syslinux
  ├── live.cfg
  ├── (other files)
  `

These are the relevant syslinux boot menu entries to load the system into RAM.
The block below this shows the same entries in the grub boot menu.
refracta2usb will create these entries but will not automatically add the toram/toram= option. You can add it at the Menu Options window or edit the boot menu manually.

Code:
  `label jessie_ice
  menu label jessie_ice
  kernel /jessie_ice/vmlinuz
  append initrd=/jessie_ice/initrd.img boot=live findiso=/jessie_ice/jessie-ice-template-20170103_1454.iso toram
  label refracta8_amd64
  menu label refracta8_amd64
  kernel /refracta8_amd64/live/vmlinuz
  append initrd=/refracta8_amd64/live/initrd.img boot=live live-media-path=/refracta8_amd64/live toram=filesystem.squashfs
  `

Code:
  `menuentry "jessie_ice " {
  set gfxpayload=keep
  linux /jessie_ice/vmlinuz boot=live findiso=/jessie_ice/jessie-ice-template-20170103_1454.iso toram
  initrd /jessie_ice/initrd.img
  }
  menuentry "refracta8_amd64 " {
  set gfxpayload=keep
  linux /refracta8_amd64/live/vmlinuz boot=live live-media-path=/refracta8_amd64/live toram=filesystem.squashfs
  initrd /refracta8_amd64/live/initrd.img
  }
  `

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