Bios - Dell XPS Consumer Information

Dell XPS Notebook Reimage "How-To" Guide
2.6

BIOS

Dell recommends flashing the latest BIOS available to the system. This is posted on Dell's driver &
downloads support web site (support.dell.com) under the "BIOS" section.
Some of the BIOS settings are critical to Operating System performance and installation. These are as follows:
Settings  System Configuration SATA Operation
o If AHCI mode is selected, System may occur blue screen and it is not recommend to set it for this
platform
If RAID mode is selected, Intel Rapid Storage Technology driver should be pre-loaded on PCIe SSD
o
SKU if the PCIe SSD can't be seen while re-install OS. See section "2.6.4 Intel Storage" of this
document
Must keep the SATA mode setting the same as choose while building Operating system. If the mode
o
change from original selection will cause Blue screen-INACCESSIBLE BOOT DEVICE and can't boot
to OS until change the mode back. Refer to Appendix C- BIOS SATA mode selection
Settings  General Advanced Boot Options Enable Legacy Option ROMs
o If OS installed with Legacy Mode, system may occur un-expected behavior and it is not
recommended to install OS with Legacy Mode

Disabled: SATA Controllers are hidden

AHCI, SATA bus is configured for AHCI mode (Advanced Disk Operation mode) which
offers faster performance, eSATA support, and increased battery life. This mode requires
an additional storage driver.

RAID On, SATA bus is configured to RAID mode (Redundant Array of Independent
Disks). This mode requires an additional storage driver. It's default setting for shipment
on Dell-XPS-9550.