Acer Altos R920 Series - Manual (Page 129)

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Mass Storage Controller Configuration
Parameter Description Option
SAS Option
ROM Enables or disables the onboard SAS
controller option ROM. Enabled
Disabled
SATA Mode When set to IDE, system supports up to 4
SATA ports with Parallel ATA emulation.
When set to AHCI, system supports all
SATA ports using the Advanced Host
Controller interface.
When set to SW RAID, system supports
configuration of SATA ports for RAID via
RAID configuration software.
IDE
AHCI
SW RAID
SATA Port 0, 1,
2, 3, 4, 5 Indicates information for the device connected to the
SATA connector.