IEI Integration ROCKY-3786 v4.0 - Manual (Page 108)

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IDE PIO [Auto]
Use the IDE PIO options below to select the Programmed Input/Output (PIO) mode for the
following HDDs:
IDE Primary Master PIO
IDE Primary Slave PIO
IDE Secondary Master PIO
IDE Secondary Slave PIO
Auto (Default) The computer selects the correct mode.
Mode 0 PIO mode 0 selected with a maximum transfer rate of 3.3MBps.
Mode 1 PIO mode 1 selected with a maximum transfer rate of 5.2MBps.
Mode 2 PIO mode 2 selected with a maximum transfer rate of 8.3MBps.
Mode 3 PIO mode 3 selected with a maximum transfer rate of 11.1MBps.
Mode 4 PIO mode 4 selected with a maximum transfer rate of 16.6MBps.
IDE UDMA [Auto]
Use the IDE UDMA option below to select the Ultra DMA (UDMA) mode for the following
HDDs:
IDE Primary Master UDMA
IDE Primary Slave UDMA
IDE Secondary Master UDMA
IDE Secondary Slave UDMA
Auto (Default) The computer selects the correct UDMA.
Disabled The UDMA for the HDD device is disabled.
USB(CN6) Controller
Use the USB Controller option to enable or disable the integrated USB controller.