Bug#740503: debian-installer: check-missing-firmware does not work with a USB drive that contains a partition table

[Chris Bainbridge <chris.bainbridge@gmail.com>]

Package: debian-installer
Version: 7.0.4 wheezy iso
Severity: important

Dear Maintainer,

Installing from debian-7.4.0-amd64-netinst.iso

check-missing-firmware does not work with a USB drive that
contains a partition table. When a USB drive with a single partition
containing the firmware is inserted, it reports that the firmware was
not found. The firmware is on partition /dev/sdc1. From the log I can
see that the function is attempting to scan drives and partitions
detected on the system, and mount them as FAT file systems. The
problem is that it does not try the USB drive partition 1 at
/dev/sdc1. It does try /dev/{sda sda sdc sdc sda1 sda1 sda sda sdc sdc
sda1 sda1 sda2 sda2 sda3 sda3} in that order. So it is trying to mount
/dev/sdc (the USB drive) but not /dev/sdc1 (the actual partition).

   - Workaround is to format the USB drive without a partition table,
     e.g. "mkfs.vfat -I /dev/sdc" (mkfs.vfat actually expects a
     partition table, -I override forces it to use the entire device)