BootDevice Not Found - acer aspire s7

[stevef]

Hi guys

About the disks number, here are the informations in the BIOS :

HDD0 Model Name : LITEONIT CMT-128L3M
HDD0 Serial Number : 002242101572A
HDD1 Model Name : LITEONIT CMT-128L3M
HDD1 Serial Number : 002242101572B

And under Main :

SATA Mode      [RAID Mode]

Thank you.
Without having the same hardware, it is difficult to advise specific steps.
Trying to use the regular GRUB/Ubuntu boot set up might be difficult with hardware RAID.

If you don't want (or need) the system to operate RAID, it may be worth entering the UEFI/BIOS set up again to investigate changing the SATA mode from RAID to AHCI.
This might make things easier.