simple: amiga cd-drives different from pc ones

[Piru]

Maybe it should be also pointed out that I used self-made (unbuffered) 4-way IDE interface (44-pin 2.5" mobo connector <-> 4 x 40-pin connector) in my A1200 for years, and I never had any problems with it. The A1200 mobo is still fine (even though now retired). YMMV.

[Piru]

@SamuraiCrow

If he tries to hook up a hard drive AND CDROM it will likely overload the signal pins and fry the motherboard.

Well, I had 3 HDDs and a CD-RW drive hooked to std A1200 IDE. No buffering - no problems whatsoever. (Oh, naturally everything was powered by proper PC PSU)

Yes, but AmigaOS for less than version 4.0 prerelease 4 will not read files larger than 2 GB

DVDs don't typically hold files larger than 1GB (mainly because the mainstream OS has issues with larger files). Movie DVDs use several 1GB files, you can read them on classic amiga just fine. In fact, movie player apps access the DVD directly, and thus are not bound by any limitations of a filesystem. Largefile support is not required for DVDs, it's mostly useful for HDDs.

DVD movie playback on classic Amiga is completely another matter...