![]() ![]() Menu label ^Try Ubuntu without installingĪppend initrd=/casper/initrd.lz file=/cdrom/preseed/ed boot=casper quiet splash - persistentĪs mentioned in the previous comment, this is related to the bug My current default kernel arguments are: label ubnentry1 I can't seem to save those logs though, so I'm unable to provide them at this time. This time it at least finds the boot partition and starts attempting to boot the Live USB disk, but seems to fail along the way, with a bunch of "casper" related warnings. I've also tried updating my kernel boot parameters, by inserting LIVE-MEDIA=/dev/sdd1 (in my case) at boot time by hitting TAB, ie: kernel /casper/vmlinuz.efi initrd=/casper/initrd.lz file=/cdrom/preseed/ed boot=casper LIVE-MEDIA=/dev/sdd1 - persistent bug #1293811: casper no longer wants to boot off HDD devices.Bug #1241589: ubuntu 13.10 unable to boot on live usb (busy box - initramfs)Īnd that it has been solved, so I should expect the fix to already be in my Ubuntu 14.04.03 image:.I've gone through the Ubuntu bug tracker, and it seems that this issue has been observed by numerous others: dmar: IOMMU: failed to map dmar0īusyBox v1.12.1 (Ubuntu 1:21.0-1ubuntu1) built-in shell (ash)Įnter 'help' for a list of built-in commands. When I attempt to boot from my newly-created flash drive, I am directed to a prompt instead of Ubuntu properly booting, though I briefly see the graphical Ubuntu startup screen animation. I followed all of the advised steps, but booting fails. Use gparted to create an ext2/ext3/ext4 partition after the FAT partition, and give it a volume lable of casper-rw.Delete the casper-rw loopback file on the first FAT partition on the flash drive.Create a Live USB flash drive with Ubuntu, leaving space for an extra partition.How do I get a live-USB to use a partition for persistence?.How to make a persistent live Ubuntu USB with more than 4GB.I've tried the steps in the following articles: It's fine if they burn out due to excessive write cycles, and each FAE gets a dozen of them if needed for each trip.Īlso, we need to keep the first partition on the disk as a FAT partition in case the FAE needs to drop files onto the disk from Windows, Mac, Linux, etc, as Windows machines refuse to mount FAT partitions on a flash drive unless they are the first and only FAT partition on the disk. I need to have a persistence file larger than 4GB, as I'm creating a bunch of these flash drives for Field Application Engineers (FAEs), and they need to be able to use them on the road to diagnose installations for custom systems my company currently supports. In both cases, persistence worked successfully (I had to manually enable it when using Ubuntu Startup Disk Creator, but UNetBootin adds the -persistent kernel argument automatically to syslinux.cfg), no problems. In both cases, I was able to successfully deploy my Ubuntu ISO ( which I've confirmed is intact via md5sum analysis). With that out of the way: I've created an Ubuntu 14.04.03 Live USB Flash Drive (32GB) using UNetbootin, as well as the Ubuntu Startup Disk Creator. Persistent Ubuntu 14.04 USB fails to boot after creation of ext4 casper-rw partition.Ubuntu Live-USB Using a "casper-rw" Partition.So, I've spent the last day going through similar questions, and can confirm first that this is not a duplicate of: ![]()
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