One thing to add. IIRC there is a particular version of the A600 kickstart ROM which doesn't allow booting from hard drive. You might want to check what version you have (boot to Workbench, open a shell and type "version") and if you have the affected version you may want to consider upgrading your ROM chips. For reference:
- Kickstart Version 37.299: No support for ATA controller (must boot from floppy)
- Kickstart Version 37.300: Support for ATA controller (can boot from hard drives, but only supports up to 40MB)
- Kickstart Version 37.350 and up: Support for ATA controller (can boot from hard drives and supports up to 4GB)
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moto