Legacy ISA PATA support (Experimental)

modulename: pata_legacy.ko

configname: CONFIG_PATA_LEGACY

Linux Kernel Configuration
└─>Device Drivers
└─>Serial ATA and Parallel ATA drivers
└─>Legacy ISA PATA support (Experimental)
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This option enables support for ISA/VLB/PCI bus legacy PATA
ports and allows them to be accessed via the new ATA layer.

If unsure, say N.

source code: