If the drive itself is dead, you may have to send it to someone like DriveSavers for recovery (which is expensive).
If it's just a cable/connector problem, repairing it and getting your data back is pretty straightforward. If you want to try, there are guides at if not, find a repair shop to do it for you. Recent Apple laptops are not very easy to work on, so you may not want to risk doing this yourself. In any of these cases, the only chance you have to get data off is will involve opening up the computer, checking cables and connections, and maybe removing the HD. The disk itself may be dead, or a cable torn, or a connector knocked loose. The unique identifier for this apps bundle is com. Since I don't see any sign of your internal drive, even at the /dev entry level, I'm pretty sure you have a hardware problem that nothing like DiskWarrior will be able to help with. It uses Apple EFI drivers to boot OSX but it also loads kexts, DSDT. The rest are all virtual disks of one sort or another - /dev/disk1 ('Mac OS Base System') is a disk image mounted from the USB disk, and the rest are RAM disks used by the Recovery system. dev/disk0 (the USB installer disk) is the only physical disk visible here.
