MSI MS-9638 series - Manual (Page 42)

3-10
MS-9638 Server Board
[Enhanced] SATA and PATA drives are auto-detected and placed
(non-AHCI) in Native IDE mode.
SATA RAID Enable
This feature allows users to enable or disable the RAID function for each
SATA hard disk drive.
SATA AHCI Enable
This setting disables/enables Enhanced AHCI mode. 6 SATA HDDs will be
supported under this mode.
SATA RAID & AHCI Enable (for Adaptec SATA RAID Option ROM)
If this setting is set to [Enabled] and the SATA RAID function is not configured,
only AHCI mode will be supported. Once AHCI mode is enabled, 6 SATA
HDDs will be supported under this mode.