12.04.1 "Alternate" ISO Failing to install from USB Sticks

[lordjj]

Hello. I have been attempting to install 12.04.1 using the "alternate" iso from a USB stick, however, it fails each time at the "load installer components" stage saying a "file could not be loaded from the CD". If an "integrity check" is performed, it says each time that "./pool/main/l/linux/storage-core-modules-3.2.0-29-generic-pae-di_3.2.0-29.46_i386" is missing or corrupt.
I have already:
- Downloaded the ISO several times.
- Verified md5sum of each downloaded ISO.
- Tried different USB sticks.
- Used both unetbootin from a Linux distro, and LinuxLive USB Creator from Windows to prepare the USB sticks.

I recall installing a 12.04 alternate ISO this way, from a USB stick, without any problems in the past.

Is there a problem with the 12.04.1 alternate ISO? Or is there a particular problem when it is used off a USB stick? Or can this error be circumvented?

Thank you.

[2F4U]

Not sure if this helps, but I found at least one problems similar to yours:

http://ubuntuforums.org/showthread.php?t=2048371
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1041911

The person also used several graphical tools to create a liveUSB, which was always corrupt. Using dd resulted in a bootable and installable usb. If you have a Linux distribution available, you could try to create the usb with the dd command.

[lordjj]

Thanks for pointing that out!
Indeed, a simple

# dd if=<iso> of=/dev/<usb stick node>
resulted in a working installer.
I didn't expect that as the 12.04 iso worked well with the GUI programs --didn't expect a dd to be more reliable than those programs either :D

[pingaan]

I see it's been some time since you sorted this one out, but I'm having this problem now! :-P
When exactly am I supposed to enter that command line? When it fails or am I supposed to add the line to some file on the stick?
I'm sorry if my questions seem stupid, I'm still sort of a novice user.

Cheers.

[pingaan]

After a bit of browsing the forums I've come to understand that dd is used for creating the actual usb-stick.
Is this correct?

[oldfred]

Hybrid means you can use dd.

The daily ISOs for the Ubuntu Oneiric development cycle (and all official Ubuntu CD releases going forward)
for i386 and x86_64 platforms will be now spun as hybrid ISOs.
http://ubuntuforums.org/showthread.php?t=1783752&highlight=Hybrid

We often do not suggest dd as it can be dangerous especially for new users. Any typo and you can end up eraseing the wrong drive. And there is no recovery as it is a bit for bit overwrite.
Powerful command, but often misused and then nicknamed "dd" Data Destroyer
http://www.linuxquestions.org/questions/linux-newbie-8/learn-the-dd-command-362506/

Also instructions for CD/DVD or USB
http://www.ubuntu.com/desktop/get-ubuntu/download
Write image or burn image not copy ISO as one large file to CD.
http://www.ubuntu.com/download/help/burn-a-cd-on-windows
https://help.ubuntu.com/community/BurningIsoHowto
https://help.ubuntu.com/community/Installation/FromUSBStick


http://unetbootin.sourceforge.net/
http://www.pendrivelinux.com/