37.299 is a bit twitchy with it if I recall.
Early revisions of the A600 shipped with Kickstart 37.299, which had neither support for the internal ATA controller, nor for the PCMCIA interface. Although it was possible to load the necessary drivers from a floppy disk, it wasn't possible to boot directly from ATA or PCMCIA devices. Models fitted with Kickstart 37.300 or 37.350 can utilize those devices at boot time.
Some have had it working, others not. Mine didn't but I have recently upgraded the kickstart 3.1 rom. So it does now
