Grub boot ISO from HDD(NTFS)

[sonichy]

I need to boot from HDD not USB(Ventoy).
Edit /etc/grub.d/40_custom, add these at end, sudo update-grub.

Success

menuentry "ubuntu 16" {
    set root=(hd0,5)
    set isofile="/ISO/ubuntu-16.04.7-desktop-amd64.iso"
    loopback loop $isofile
    linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile locale=zh_CN
    initrd (loop)/casper/initrd
}

Fail

menuentry "elementaryos" {
    set root=(hd0,5)
    set isofile="/ISO/elementaryos-5.1-stable.20200814.iso"
    loopback loop $isofile
    linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile locale=zh_CN
    initrd (loop)/casper/initrd.lz
}

echo:

......
stdin: Not a typewriter
stdin: Not a typewriter
stdin: Not a typewriter
stdin: Not a typewriter
stdin: Not a typewriter
stdin: Not a typewriter
......

[fizzka]

same problem for elementaryos-6.0

[enigma131]

Same on elementary 7
Have try also :
menuentry "ElementaryOs-7.0 stable" {
set iso="/isos/elementaryos-7.0-stable.20230129rc.iso"
set isoname=ElementaryOs_7.0
loopback loop (hd0,6)$iso
linux (loop)/boot/vmlinuz root=live:LABEL=${isoname} iso-scan/filename=${iso} locale.LANG=fr_FR.UTF-8 vconsole.>
echo 'initrd loading, please wait ...'
initrd (loop)/boot/initrd.img
}

[enigma131]

Solved via toram :
menuentry "ElementaryOs-7.0 stable" {
set iso="/isos/elementaryos-7.0-stable.20230129rc.iso"
loopback loop (hd0,6)$iso
linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$iso noprompt noeject toram
echo 'initrd loading, please wait ...'
initrd (loop)/casper/initrd.lz
}