Linux will work with standard IDE, MFM and RLL controllers. When using MFM/RLL controllers it is important to use ext2fs and the bad block checking options when formatting the disk.
Enhanced IDE (EIDE) interfaces are supported. With up to two IDE interfaces and up to four hard drives and/or CD-ROM drives. Linux will detect these EIDE interfaces:
CMD-640 (Support for buggy interfaces in kernel 2.2)
RZ1000 (Support for buggy interfaces in kernel 2.2)
Cyrix CS5530 MediaGX
FGI/Holtek HT-6560B VLB (Support for secondary interface in kernel 2.2)
Triton I (82371FB) (with busmaster DMA)
Triton II (82371SB) (with busmaster DMA)
ESDI controllers that emulate the ST-506 (MFM/RLL/IDE) interface will also work. The bad block checking comment also applies to these controllers.
Generic 8 bit XT controllers also work.
Starting with pre-patch-2.0.31-3 IDE/ATAPI is provided.
UMC 8672 interfaces (experimental in kernel 2.2)
Promise DC4030VL caching interface card (experimental support in kernel 2.2)