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likewhoa
l33t
Joined: 04 Oct 2006
Posts: 728
Location: Brooklyn, New York
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 Posted: Thu Aug 18, 2011 3:15 pm Post subject: Re: Which parameters are used mkisofs making the liveDVD? |
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| lennarts wrote: | Hi,
While I found out that "da" was missing fron the LINGUAS environment variable in /etc/make.conf, I decided to remake the liveDVD.
No problems mounting the DVD, and the image.squashfs filesytem, copying the files from here, set up a chrooted environment for re-emerging with the updated LINGUAS.
I also managed to make a new version of image.squashfs, and got made a new iso image, which I can loop mount without any problems, and also loop mount the inlined image.squashfs filesytem, but when I try to boot the it does not work.
I also tried to look at http://en.gentoo-wiki.com/wiki/Build_Your_Own_LiveCD_or_LiveDVD but in vain.
So can you tell me how you are building the iso image?
In advance thanks,
Lennart |
You need to file a separate bug for your keymap issue and NOT flood the tracker bug with comments as stated on it.
W.R.T to generating the final iso image, you need to run <code>mkisofs -J -R -l -o ../image.iso -b isolinux/isolinux.bin \
-c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table ../real</code>
with real directory containing the isolinux folder and squashfs image below it. good luck. Also that WIKI article is not official so USE AT OWN RISK. |
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lennarts
n00b
Joined: 11 Apr 2007
Posts: 5
Location: Denmark
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| Posted: Thu Aug 18, 2011 5:18 pm Post subject: |
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Sorry,
I misunderstood  (this was my first bug) .
I have now made a separate bug for the keymap issue.
But thanks for your answer I will now try to make the the ISO image according to your instructions. |
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crquan
n00b
Joined: 12 Oct 2007
Posts: 12
Location: Singapore
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| Posted: Thu Aug 18, 2011 10:38 pm Post subject: better way to run Gentoo LiveDVD from usb (no wiping data) |
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From the FAQ we see a way of run the livedvd from usb is dd way ("dd if=image.iso of=/dev/sdb"),
but obviously it would destroy all data on the usb, it's not good; I think after dd'ed, the remaining disk space will also disappear cannot reuse,
if that usb stick is larger than the iso 2.8G, waste space, but I didn't try dd;
http://www.gentoo.org/proj/en/pr/releases/10.0/faq.xml#usb
http://mirrors.kernel.org/gentoo/releases/amd64/11.2/
| Code: | | livedvd-amd64-multilib-11.2.iso 06-Aug-2011 07:12 2.8G |
these days, I worked a non-destructive way to use usb to boot Gentoo LiveDVD;
because I have 8G usb stick, and still want to keep its current data;
I'm not sure if any other one tried this before, but it is my original, post on my blog:
http://blog.crquan.info/2011/08/step-1-boot-from-usbstick-without.html
- mount loop that livedvd-amd64-multilib-11.2.iso; mkdir /gentoo on the usb stick, copy all files inside the iso into that /gentoo;
- rename its isolinux/ to syslinux/, and isolinux.cfg to syslinux.cfg; yes! thanks to syslinux.zytor.com great work, they're sharing the same configuration file syntax, what you need to do is just rename;
- since we copied all the files from rootdir of cdrom to a subdir "/gentoo" of another disk(usb), the syslinux.cfg need to be adjusted; find out the "label gentoo-x86_64", change it to this;
| Code: | label gentoo-x86_64
MENU LABEL Gentoo ^x86_64
kernel ../boot/gentoo
append root=/dev/ram0 init=/linuxrc dokeymap aufs looptype=squashfs loop=/gentoo/image.squashfs cdroot initrd=../boot/gentoo.igz vga=791 splash=silent,theme:livecd-10 console=tty1 quiet subdir=gentoo |
the "kernel" "initrd=" parameters was parsed and loaded by syslinux, it support "../" style relative path, so actually you could move the whole "/gentoo" to any name, under any path; but the "loop=" and some other paths was read by code inside the initramfs (here it's ../boot/gentoo.igz), there some hard code doesn't support relative path, so you must write its full absolute path, prepend "/gentoo" to image.squashfs, and append "subdir=gentoo";
for other label entries if you want to use, you could change it the same way;
install syslinux bootsector to that usb stick (/dev/sdb has only one vfat partition):
| Code: | | syslinux -d /gentoo/syslinux /dev/sdb1 |
Then you could boot it with this usb: find out label gentoo-x86_64 and boot it into LiveDVD 11.2; Enjoy it, and the remaining space;
_________________
"One of my most productive days was throwing away 1000 lines of code."
- Ken Thompson. |
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djdunn
l33t
Joined: 26 Dec 2004
Posts: 617
Location: Under the moon and all the stars in the sky.
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| Posted: Thu Aug 18, 2011 11:30 pm Post subject: |
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really cool maybe this can be changed to a liveusb image and uploaded so changes dont have to happen
_________________
Now, with penguins, (cuddly such), "contented" means it has either just gotten laid, or it's stuffed on herring. Take it from me, I'm an expert on penguins, those are really the only two options.
--Linus Torvalds |
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crquan
n00b
Joined: 12 Oct 2007
Posts: 12
Location: Singapore
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| Posted: Fri Aug 19, 2011 2:42 am Post subject: |
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the thing is how to make a liveusb image? is there a standard like cdrom iso format? Or just "dd if=/dev/sdb of=liveusb.img"? then it could be as large as 8g;
_________________
"One of my most productive days was throwing away 1000 lines of code."
- Ken Thompson. |
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djdunn
l33t
Joined: 26 Dec 2004
Posts: 617
Location: Under the moon and all the stars in the sky.
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| Posted: Fri Aug 19, 2011 5:12 am Post subject: |
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would it be easier just to untar it to a usb?
_________________
Now, with penguins, (cuddly such), "contented" means it has either just gotten laid, or it's stuffed on herring. Take it from me, I'm an expert on penguins, those are really the only two options.
--Linus Torvalds |
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crquan
n00b
Joined: 12 Oct 2007
Posts: 12
Location: Singapore
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| Posted: Fri Aug 19, 2011 6:19 am Post subject: |
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it could be untar'ed that way, but the last step of "install syslinux bootsector" still need to be done separately;
_________________
"One of my most productive days was throwing away 1000 lines of code."
- Ken Thompson. |
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desultory
Administrator
Joined: 04 Nov 2005
Posts: 7450
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| Posted: Thu Sep 01, 2011 5:37 am Post subject: |
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| Merged the preceding five posts. |
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Saundersx
Apprentice
Joined: 11 Apr 2005
Posts: 184
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likewhoa
l33t
Joined: 04 Oct 2006
Posts: 728
Location: Brooklyn, New York
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| Posted: Mon Sep 05, 2011 3:25 pm Post subject: |
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our livedvd image is already hybrid so there is NO need for a script to allow booting from removable devices like a usb stick. see the FAQ to learn more. |
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