Re: [gentoo-user] Re: [OT] Making a bootable USB flash drive from ISO image

[thegeezer <thegeezer@thegeezer.net>]

On 03/10/14 16:19, James wrote:
> Neil Bothwick <neil <at> digimed.co.uk> writes:
>
>
>
>> I was also wrong in stating I use isohybrid for the LXFDVDs. I used to
>> but since switching to using GRUB to boot the DVDs, there is no need for
>> it. GRUB bootable DVD ISOs can boot from USB sticks by default.
> Neil,
>
> Can you elaborate? For example how do you know a given *.iso* is grub
> bootable? 

All ISO files are grub2 bootable. 
however, once booted, they need to be aware to search for the iso file
itself as otherwise they search for cdrom/files

> It there a test?  Is there a list? Just burn it to a usbstick
> and test? 
google for grub2 iso bootable mydistro
windows boots but gets confused
gentoo minimal works fine but you need to pass correct parameters

> Justuse a tool such as the aforementioned "isohybrid" can convert
> any *.iso* to a grub bootable?  I like the idea of one image (iso) being
> able to install via MBR or grub.  
>
i like to boot ubuntu / gentoo by having various iso files listed and
changing grub config
> How do you control the file system; set it up first on the target HDD/SDD?
> Which tool do you use, as part of the usb package? gptfdisk (gdisk)?
download iso
tell grub2 about iso location
>> That must be a UEFI bootable disc. ISOs can have all sorts of strange
>> setups
> Your telling me? So when did the gentoo liveDVD become "grub bootable" ?
> Again, How do you know what a given images is capable, as the details of
> so many seem to poor--> 2----> undocumented......?
>
> Have you ever tried "pentoo-installer" off of a live gentoo dvd ?
> with any usb iso?
>
>
> curiously,
> James
>
>
>
>
>
hth
grub2-mkconfig is a pita but the iso boot by itself redeems itself