Comment 71 for bug 1241589

Re #68, I had the same issue. My HDD and SSD are /dev/sda and /dev/sdb, so the USB drive would show up as /dev/sdc. However, when I ran blkid from the initramfs prompt, all I saw were sda* and sdb* partitions (and I know those were my internal drives based on the partition schemes). I was able to boot properly via the following steps:

1. Adding the live-media boot option as described in #55 (for me 'live-media=/dev/sdc1')
2. Removing the 'quiet splash' (so I could see what was going on easier)
3. Booting and waiting for the boot output to pause for a bit (something about unable to find USB at address...)
4. Removing the live USB and re-inserting it.

The system then recognized a new USB drive at /dev/sdc and proceeded to boot normally. I know that's a very strange procedure, but it allowed me to boot and install properly, without doing anything drastic such as removing or zeroing my drives.

For reference, I have a Lenovo Y580 with a SATA HDD and an mSATA SSD. In BIOS I had SATA in AHCI mode and was using UEFI (no compatibility/legacy modes). My USB was plugged into a USB 2.0 port.