Installation docs need to reference both sda and nvme devices

[Bruce Jones]

This is a report from an Intel internal user doing an evaluation of StarlingX:

   "With certain modification in the installation command of it, we were able to install.
Modification: Changed the boot_device and rootfs_device in the command from sda to nvme0n1 as my Intel test device has nvme0n1 drive (attached image: stxissue_command ) because it were not booting using default command. It would be better if somewhere in the installation guide it is written to check about boot_device and rootfs_device and edit command."

We should update our documentation to describe this more fully, at the least adding text that if you have a spinning disk drive, your device will be named sdaXX by the OS, and if you are installing on SSD-based storage it will be named nvmeXX.

[Bruce Jones (brucej)]

The docs have been changed enough that this issue is no longer valid/needed.

[Saul Wold (sgw-starlingx)]

Further update, there is a new tool provided called update_iso.sh which would allow an ISO image to be updated for different kernel cmdline options such as rootfs_device=nvme0n1 and boot_device=nvme0n1 to change from the default of sda -> nvme0n1

Additionally when using the system update-host to assign personalities to unconfigured targets, you can assign the rootfs_device and boot_device on the commandline

[Saul Wold (sgw-starlingx)]

More details (capturing here to work on the docs from)

sudo ./update-iso.sh -i /localdisk/bootimage.iso -o /localdisk/bootimage-2.iso -p
rootfs_device=nvme0n1 -p boot_device=nvm0n1

system host-update 2 personality=controller rootfs_device=/dev/nvme0n1 boot_device=/dev/nvme0n1