Access internal drive when booting from a USB key

by James Newton   Last Updated November 13, 2017 11:02 AM

I have a Dell XPS 13 with a 256GB internal drive, partitioned to dual boot with Windows 10 and Ubuntu 16.04. After a firmware update, the laptop will no longer boot into Ubuntu, but it will boot into Windows, so the internal drive is not damaged.

I have installed Ubuntu 16.04.1 installed on an 8GB SanDisk USB key, and can boot the laptop into Ubuntu with that.

Using the information at this question, I ran sudo fdisk 1, and I see 16 entries for 64MiB volumes, in this format:

Disk /dev/ram15: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

These entries are named from /dev/ram0 to /dev/ram15, and are followed by this:

Disk /dev/loop0: 1.4 GiB, 1459982336 bytes, 2851528 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sda: 7.5 GiB, 8002732032 bytes, 15630336 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0030553a

Device     Boot Start      End  Sectors  Size Id Type
/dev/sda1  *     2048 15630335 15628288  7.5G  c W95 FAT32 (LBA)

Although this represents slightly more than 8 GB in total, none of these entries appear to refer to any of the partitions on the internal drive.

I'm still at the shallow end when it comes to understanding all the power of the command line interface, so I would appreciate simple explanations.

What do I need to do to access the internal drive?



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