Ubuntu Installation :: Casper Boot Toram Multiboot Squashfs Images
Aug 18, 2011
I've just created a bootdisk (ssd) with multiples Squasfs images I can choose to boot at the Grub2 menu.No I tried to put the sqfs-images into a ramdisk. Therefore I edited the script '/usr/share/initramfstools/ scripts/ casper'. I used the 'dirty hacks'in the ubuntuforums.org/boottoram howto but I suited them for my needs.Now the Systems stops after the kernel and doesn't find a root system.
The sqfs-image without the modification of the 'casper'-script still boots but doesn't load into ram completely.
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May 7, 2011
I have had a dual boot on my system since first trying Ubuntu a few months ago.I had a few problems when i upgraded to 11.04 (mainly due to the new desktop Unity), but after some great help here, we had the old desktop running again.I have Windows running on my spare Computer in case i should need it for any reason, though can not think of one lol Now i am used to Ubuntu (from the using side, get lost in terminal etc so here i come if i need help) i decided i would totally commit my main computer to Ubuntu.I downloaded the latest iso from the Ubuntu site, and burnt it to CD, inserted in my main computer & rebooted. It goes past the first purple ubuntu page (hit a key to choose language & also get a selection Menu) then goes to black screen and i get:
BusyBox v1.17.1 (ubuntu 1:1.17.1-10ubuntu1) built-in shell (ash)Enter 'help' for a list of built-in commands.(initramfs) mount: mounting /dev/loop0 on //silesystem.squashfs failed: Input/output errorCan not mount /dev/loop0 (/cdrom/casper/filesystem.squashfs) on //filesystem.squashfs(hope i typed that i correctly)I have burnt the iso image numerous times, using different disks, speed (from x4 - x52) and burning programs
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Jul 29, 2011
I am trying to put Ubuntu on my USB.
I use the tool here (as recomended by Ubuntu) to put it on my USB. It seems to work well up until it says "Data error in 'casper/filesystem.squashfs'. File is broken".
I tried to install it anyways (I know how to work the BIOS and everything) and the installation just stops with an error message.
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Feb 7, 2011
Trying to install 10.04.1 Kubuntu desktop to Toshiba T110 laptop running Win 7, 4 Gig Ram, 32 bit o/s. Downloaded iso from Ubuntu web site and burnt DVD. No matter what I do I get the error message "cannot mount /dev/lop0 (/cdrom/casper/filesystem. squashfs" etc. Searched by Google and this forum, tried various remedies Unebootin; USB drive boot up etc etc; still get same message. Is there a workaround for what seems to be a fairly common install problem?
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Jan 16, 2010
So I made a neat little fluxbox distro(another one?) actually its the latest incarnation of 503box
Anyway; with Debian Live (which its made from) one of the boot parameters is[url]
Boot in TORAM mode, as you see there above link..Specifically I used
Code:
Which isnt listed but actually works better as it only boots the compressed fs into RAM
Using just "toram" the whole cd/iso,etc is booted into RAM
Anyway; so for some reason the memory usages are about the same no matter whether booting toram
or not?
Heres Proof; using "free"
Environs- at each boot I am booting off 2GB fat32 usb on a Desktop PC.
Heres Debian's default live boot not toram, no persistent (usb mounted)
[url]
so it using about 80MB RAM?
Heres in toram/no persistent mode(no drives mounted...usb/cd removable)
[url]
How that be red?
The squashfs filesystem is 340MB shot into ram so why isnt the mem usage higher?
Heres some more pics- note that all the mem usage is about the same..
At boot it gives message when using toram mode
Code:
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Mar 24, 2009
Recently I have started looking into squashfs filesystems which are used by many LiveCDs. I see that the Debian Live Project also has a squashfs image of their LiveCD. I am wondering how to use that squashfs image to make a bootable USB LiveCD?
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Feb 21, 2011
I've made myself a multiboot usb drive and looking to add ubuntu to it. I've created a live system and its respective casper drive, made the changes I want to it and now looking to make the whole system boot to ram including the casper drive so I can use the same usb drive in multiple machines instead of having to have multiple usb pens.
I've added the toram option in the txt.cfg file but only the operating system (filesystem.squashfs) goes into ram so when I take the usb out, the files on the casper drive are lost.
Could you tell me either how to boot the casper drive to ram or how to combine or merge the filesystem.squash and the casper-rw drive.
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Sep 29, 2010
Just migrating to linux but I don't want to give up linux just yet so I've stuck in a 2nd hard drive to install linux on which I've done, now I have windows on one hard drive and linux on the other but my computer boots straight onto linux. I need the option to choose which os to boot into on startup which I've heard GRUB is the best option but I have no idea how to go about setting this up.
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Aug 18, 2010
I'm having an issue with GRUB, I have four OSes on my hard drive. Here they are in the order I installed them:
Windows 7 (Windows bootloader)
Ubuntu (GRUB 1.97)
YLMF OS (GRUB 2)
Debian (Some ancient bootloader)
(For those of you unfamiliar with it, YLMF OS is an Ubuntu-based distro re-skinned to look like Windows XP. Other than the theme and branding it's exactly the same as Ubuntu) Each time I installed another operating system, it replaced my original bootloader with its own. I made the mistake of installing Debian last, thus leaving me "stranded" with an old version of GRUB. Since at the time I was relatively inexperienced with Linux, I solved the problem by reinstalling Ubuntu, which then replaced the bootloader with GRUB 1.97.
I mainly use YLMF OS, and so when I wanted to change some GRUB menu settings (the default entry, timeout, etc.) I naturally changed the /etc/default/grub file in the YLMF OS partition, not the one in Ubuntu. Once I rebooted I realized that my changes weren't being applied for that reason. Thus my problem is that my computer is using the GRUB that Ubuntu installed, not the one YLMF OS came with. How do I change which version of GRUB is used when I boot up? Yes, I could just change the settings in the Ubuntu partition, but YLMF OS came with the newer/est version of GRUB, so I want to use that instead.
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Oct 18, 2010
I am using Ubuntu on a memory stick and it is loading Casper.
When loading it ask for the language that you prefer and then loads.
I would like to have be default to english and boot straight into Ubuntu live.
Also posted another issue that I was having to where when it boots, is displays this:
PHP Code:
And hangs for about a minute and them boots.
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Sep 11, 2010
is there a way to remove a patch from a kernel?
I need to apply a squashfs-lzma patch (squashfs 4.1cvs) to the liquorix kernel source which is already patched with squashfs 4.0.
how would I do that?I tried googling got this. url
but I dont know the command used to apply the patch the patch is called
35.4-3.patch.gz
url
but that patch includes more than squashfs,etc
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Oct 25, 2010
I am trying to make a usb installed ubuntu(with persistent) unchangeable. The usb needs to use the data from the persistent casper-rw, but in the same time not be able to change the casper-rw. I have tried installing ubuntu on a SD-card, and then simply lock the SD-card. So fine so good, but it just wont bootup then - it says "Aufs mount failed".
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Nov 23, 2010
I have recently been experimenting with installing Ubuntu 10.10 on a USB/Flash drive, and have finally stumbled on the "Universal USB Installer", using a so-called "Casper" file for persistence.Now I wanted to make the Casper file bigger, and found this article:I was reading it, and got confused at this part:"This tutorial assumes that you have already created a bootable USB Flash Drive that contains Ubuntu or an Ubuntu based Live Distro like Xubuntu, Kubuntu, Linux Mint, Crunchbang, etc. You should delete any existing casper-rw file from the drive to free up all available space before proceeding.
1. Restart your Computer, booting from an Ubuntu Live CD"Do they mean that you have to make 1 flash drive that was created with the Universal USB Installer, and has a Casper file on it, AND you have a Live CD from which you operate?If so, could I use one flash drive that acts like a Live CD (without the Casper file), and create another flash drive that DOES have the Casper file, and then boot from the one without, and follow the instructions? (Sorry for the complex sentence, didn't know how other to put it...)
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May 25, 2011
I'm using an acer aspire one netbook and attempting to install ubuntu 11.04 on it using flash drive. I extracted the installer using the universal usb installer. Anyway as soon as I get to the ubuntu installer screen it won't let the installer begin and says this: "could not find kernel img:/casper/vmlinuz. I have tried many things including typing in this:"vmlinuz initrd.img" and extracting the data to the flash drive again but nothing has worked.
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Jan 19, 2011
I'm installing 10.10 on another laptop (after successful and enjoyable install on previous laptop) but am running into some snags:
-Inserting 10.10 disc I got in the mail from Ubuntu, laptop boots from CD as it should, logo pops up and install begins.
-Start getting a string of error messages, most of which are the "SQUASHFS" errors.
Is this an issue with my XP configuration? Would I be better suited to format the HD and erase XP and start from there?
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May 13, 2011
I have a second hand/used HDD which I want to use for an installation of 11.04 from CD. I have used this CD on identical hardware successfully before.When trying to install, Ubuntu sees that I do not have enough space on the HDD and tells me that only 657MiB is present and that 100% is in use. (see attached screenshots) I used DBAN thinking that this would completely wipe the drive but it has not solved things. DBAN recognised the drive as 152GiB.
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Mar 14, 2011
xubuntu iso was downloaded with wget on Kubuntu, I did a md5sum checksum in terminal which passed, also K3b's check passed. K3b burned iso with no errors, I set speed at 4x. I made two coasters before getting this far but it still won't get past the BusyBox built-in shell prompt after choosing my language and staring at the xfce mouse for a minute:
Code:
BusyBox v15.3 (Ubuntu 1:1.15.3-1ubuntu5) built-in shell (ash)
(initramfs) Can not mount /dev/loop0 (/cdrom/casper/filesystem.squashfs) on //filesystem.squashfs
is what I get when trying to boot live cd on both my Linux PC and Windows XP box.
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Sep 9, 2010
I upgraded 9.10 to 10.04 via the web. The program announced it would take several hours, and when I came back to check, computer was off (kids?). Anyway, machine boots and 10.04 starts, but then blinks a few times and goes to a prompt. What should I tell it?
I have a 10.04 disc too, but it won't run from that either (Cannot mount dev/loop0 on filesystem.squashfs failed). Same message when I tried to start a nearby Windows machine with it. Disc "verified" when I made it. What's with that?
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Apr 5, 2010
I'm trying to install Kubuntu on an old Windows system. I am getting tons of errors such as:
I/O error
SQUASHFS error:unable to read page, block XXXXXX
SQUASHFS error: unable to read fragment cache block
It then reports that it's loading ACPI modules and starting the ACPI services, starting the system log daemon, doing Wacom setup, starting kernel log daemon.....and then it reads sb_bread failed reading block umptysquat.I have a feeling that this hard drive is toast. I can't get it to install Windoze or Linux. I can't even get a prompt so I can do a low-level format. Unfortunately, I'm not super savvy with Linux and don't know what to do next.
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Jun 18, 2010
my friend using XP and it was closed because he didnt activate it . he want to try Linux , i adviced him to use UBUNTU 10.10, but after we order the boot we got a loading screen for ubuntu then this error appeared
Quote: busybox v1.15.3 ( ubuntu 1:1.15.3-1ubuntu5) built-in shell (ash) enter 'help' for a list of built-in commands. (initramfs) stdin :I/O error mount: mounting /dev/loop0 on //filesystem.squashfs faild: no such device can not mount /dev/loop0 (/cdrom/casper filesystem.squashfs) on //filesystem.squashfs udevd[75]: worker [171] unexpectedly returned with status 0x0100 udevd[75]: worker [171] failed while handling ' /devices/virtual/block/loop0'
i change the cd to another one but an error was changed to :.............
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Oct 22, 2010
Have you ever wanted the Ubuntu LiveCD to have a ToRAM feature like knoppix? I know I have. Looking around online, a HOWTO that focuses on this exact topic is [url] . [url] hasn't been updated since Ubuntu 9.10 was released however, and some things it mentions no longer work as it describes (especially things dealing with the bootloader). It also isn't the easiest HOWTO to follow (maybe that's just me) mainly because of the multiple things that need to be mounted and kept track of. This is why I spent a few days developing a script that will take an Ubuntu ISO, and add a ToRAM feature to it. I used [url]and [url]as my two main sources of information so thanks to the authors of both those pages for making this script possible.
What is a ToRAM feature?
A ToRAM feature is something that copies the entire CD to RAM before running the live environment. I first saw this done by knoppix, one of the first linux distributions I've ever tried, and now this can be done with Ubuntu as well.
Why do this?
There are several reasons:
Speed: A LiveCD environment is usually considered to be slower than a regular install of Ubuntu. This is because instead of running from the hard drive, the LiveCD runs right from your CD, and since CDs are slower than hard drives, this results in a slower Ubuntu then you may be used to. A ToRAM feature addresses this issue. This is because when the LiveCD environment runs from your RAM, it is not only faster than a regular hard drive install (due to RAM's insane speeds), it is also faster than any SSD.
Getting your CD Drive back: If you boot into a LiveCD environment from a CD, Ubuntu needs that CD to operate. If you have a single CD drive (like most of us do), you can no longer use that drive. If this is a problem for you, the ToRAM feature addresses this as well since it doesn't need the Ubuntu CD to operate, allowing you to remove it and replaces it with any other CD.
Fast Install: Although Ubuntu's install process is fast, it can still take a while before it finishes. If you install Ubuntu often, and don't have the patience to wait for it to finish every time, you can speed up the process by using the ToRAM feature. As an added bonus, if you are installing Ubuntu on many machines at once (like in a library or a computer room), the ToRAM feature allows you to do this in parallel since you won't need the CD for 99% of the installation (only to start it).
What will this work on?
This should work for Ubuntu 10.10 x86 or amd64, but keep in mind:
Quote:
Originally Posted by [url]
The architecture (Amd64 or i386) to be stored on the LiveCD should be the same as the architecture used to perform the customization, or the LiveCD may not run. It is not trivial to customize an AMD64 LiveCD using an i386 operating system, for example.
Word of Warning
Although I try to build safeguards into any script I upload to the internet to keep them from doing anything unexpected, including this one, you may want to run this script in a VM where it's safe. You could also try running it from a live CD where, if it goes rouge for some reason, it won't kill anything.
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Jul 27, 2010
I'm trying to get a fully encrypted system with several linux partitions.I use one big encrypted (luks) partition which I divide into several smaller with LVM but I still need to set the boot folder on a non-encrypted partition.So my question is : is there a way to have only one boot partition instead of one for each system ?
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Nov 2, 2010
So i insert the ubuntu 10.10 in the dvd and boot it. The menu comes up and i choose to install ubuntu. After that it shows some black screens and this error:
(initramfs)mount:mounting/dev/loop0 on//filesystem.squashfs failed: Input/output error cannot mount /dev/loop0(/cdrom/casper/filesystem.squashfs)on//filesystem.squashfs
The disc aint scratched. I tried installing from Windows but i got another error.
And for some odd reason Ic ant make a removable startup disk:
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Nov 7, 2010
my friend using XP and it was closed because he didnt activate it . he want to try Linux , i adviced him to use UBUNTU 10.10 ,but after we order the boot we got a loading screen for ubuntu then this error appeared
[code]...
also , the labtop cannot boot from usb coz no option for that in BIOS. what can i do to solve each problems?
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Mar 31, 2010
eeebuntu 4 beta uses grub2. If opensuse 11.x is installed as a multiboot, opensuse grub does not recognise eb4. In opensuse, contents of fdisk - l:
[code]...
How do I add eebuntu boot in opensuse?
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Sep 11, 2010
I currently have 2 operating systems on my main hdd: Ubuntu and WinXP My current setup - [storage NTFS partition, solely data][17GB WinXP partition][{extended partion}Ubuntu + swap]: [URL] I have a second SATA hdd that I would like to install Arch Linux on to. It uses GRUB Legacy, and Ubuntu uses GRUB 2. I would like to know how I would go about booting this, and figure out where my current bootloader is installed to. i.e. /dev/sda or /dev/sda5 (the / ubuntu partiton)
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Apr 13, 2011
I want to multiboot several Distros for experimental purposes. My main distro is Ubuntu 10.04.Hard drive is partitioned like such: /dev/sda1, grup bios, size = 977 Kib/dev/sda2, file system ext4, size 1.8 Tib, this is mounted on / /dev/sda3 linux swap, 4.3Gib.My question is can I use Gparted to partition a second space out of sda2, and install another Distro? Do I mount it on / ? and will grub boot see both OS without destroying the kernel of my old distro? I am assuming to partition my hard drive I have to unmount it, but can I do this without using a live cd? So many questions and so little help, because apparently this is an easy thing to do.I am just worried just seems that what I just described is too easy and I will probably destroy everything and have to start over.
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Aug 25, 2010
Have you ever heard of multibooting many distros from the same partition?
Do you need to find a way to install the new Ubuntu 10.04x LTS into an existing partition as another option to multiboot?
Simple, you don't need to download or install any scripts or executables. read on @
[URL]
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Jun 1, 2010
I am trying to install Ubuntu10.04 on my machine which already has on it, Win XP. Lemme lay down the setup of my machine first of all.
I got a new 320GB HDD of which I have taken 20GB as the primary partition and installed Win XP on it. Took another 220GB as an extended partition for my data storage. Around 63GB was remaining which I left it as unallocated. Decided to try Ubuntu, but preferred to boot it from the windows bootloader. Downloaded and burned the Ubuntu-10.04-desktop-amd64.iso(have a AMD x3 425 machine) and tried an install on 30GB of the 63 left.
I did not try any partition scheme. I chose the manual partition option, made a 28GB ext4 partition, made it primary, mounted the /, took another 2GB for the swap and proceeded. Chose advanced option and installed grub on the 28GB(/dev/sda6) and completed the installation.
Since no grub was installed, Ubuntu was not available. So then, used the bootpart utility to point grub to the windows bootloader, but it did not work, was giving me error when I chose Ubuntu from the bootmenu modified by the bootpart.
So tried booting with the same install cd, chose Live Ubuntu this time and mounted the 28GB, copied the first 512bytes using dd if=/dev/sda6 of=ubuntu bs=512 count=1 to a usb drive. Rebooted into windows and copied the file to C: and added it to the boot.ini. Rebooted and tried choosing Ubuntu from the boot menu but it does not work. I get a blank screen with the cursor blinking.
The machine is new and BIOS is LBA enabled by auto.
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Aug 4, 2010
I decided to install my 4th OS, centos. I had some problem and I want to share my experience in this case. After several install and a few kernel panic message, I could successfully dual booted with Ubuntu 10.04 and centos5.5.
First: Boot from DVD and I got kernel panic. A bios update solved my problem (MSI).
Second: When I installed centos without grub and after the install when I wanted to boot in I got something like this: Kernel panic - not syncing: VFS: unable to mount root fs on unknown-block(0,0)
After 4 days I found out this:
1. I installed every OS, Ubuntu was the last one.
2. I left an unpartitioned free place for centos
3. I installed centos at last. During centos installation, at partitioning, choose "create custom layout"
4. Choose the free place as / and on the next screen you can choose, do NOT install grub.
5. Reboot > in grub choose Ubuntu 10.04 (in my case centos5 already was listed there, but don't go there), because we need to edit the grub.cfg file in ubuntu
My original grub.cfg file, (centos part) was like this:
menuentry "CentOS release 5.5 (Final) (on /dev/sdb3)" {
insmod ext2
set root='(hd1,3)'
search --no-floppy --fs-uuid --set bc47e87e-88c6-4756-8f47-361298b23a16
linux /boot/vmlinuz-2.6.18-194.el5 root=/dev/sdb3 }
I changed it for this:
menuentry "CentOS release 5.5 (Final) (on /dev/sdb3)" {
insmod ext2
set root='(hd1,3)'
search --no-floppy --fs-uuid --set bc47e87e-88c6-4756-8f47-361298b23a16
linux /boot/vmlinuz-2.6.18-194.el5 root=UUID=bc47e87e-88c6-4756-8f47-361298b23a16
initrd /boot/initrd-2.6.18-194.el5.img }
Save, restart and this time I could boot in to centos. After Ubuntu kernel update, you need to edit grub.cfg again!
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