[cooking] booting loram-cdrom on usb ( was: [cooking] various boot modes, successes and failures)

[Philippe Lelédy <slitaz@xxxxxxxxx>]

I open a new thread,

On 25/12/2010 18:36, pascal.bellard@xxxxxxxxxx wrote:
> Hi,
>
> Can you try the following (I assume your usb key is /dev/usbkey, it should
> be /dev/sda, /dev/sdb or /dev/sdc, see
> http://doc.slitaz.org/en:guides:dvd#hybrid-iso too)
>
> # wget http://mirror.slitaz.org/iso/undigest/slitaz-core-loram-cdrom.iso
> # dd if=slitaz-core-loram-cdrom.iso of=/dev/usbkey
> ( or 'cp slitaz-core-loram-cdrom.iso /dev/usbkey')
> # fdisk /dev/usbkey ...
>
> And try to boot from the usb key.
>
> -pascal
Yes, I did, but I don't understand what I am supposed to do with

fdisk /dev/usbkey

*after* the dd

http://doc.slitaz.org/en:guides:dvd#hybrid-iso gives no details.

I thought that dd would have erased the mbr and partition table, but it 
seems that it's not the case. The usb key seems unmodified (and boots 
puppy as before !)

But I found  bugs in tazlito build-loram ( /sys and /dev/sdxx are 
missing in initramfs ) , this bugs do no harm on real cdrom because 
because /dev/hdc does exists on the initramfs, but have to be corrected 
for usb.

I have applied my patch to tazlito, and I am happy with my 
loram-smallcdrom on usb I am using now on Mac or Dell computer.

However, I can't try on less than 512M because VirtualBox doesn't boot 
out of USB. I does not remind if kvm is able to do so. The only way I 
boot is with rootfs.gz beeing copied in RAM, so after boot, it works 
exactly like loram-ram. I will try "keep-loram" which means "don't copy 
roofs.gz in RAM".

Ph.L.



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