A2000 Self-Destructing!!!!! :(

[Castellen]

Sounds like you might have intermittent problems with the ribbon cables.  The IDC connectors can go dodgy after they've been yanked in and out multiple times.

Replace them with new cables, or just make your own, that way you can get the exact lengths you require.  You just need a vice to crimp on the new connectors.  Avoid recycling connectors from old cables as they might not provide a reliable connection.

[Castellen]

Yep.  There's lots of DIL sockets on the A2000 motherboard from what I remember, and it's common knowledge about how reliable they are...  Often the cause of many intermittent problems.

Remove and reinsert all the socketed devices.  Same applies for memory devices, Zorro cards.  All the connectors in general.  You can get contact cleaner specifically for gold plated computer contacts.

[Castellen]

I gather you've checked obvious things like SCSI termination is correct?

My A3000D would do similar things with certain hard disks, in particular a 9Gb Seagate Barracuda.  Enabling Fast SCSI 2 mode in the controller preferences made it work OK.

Maybe see what options are available on your SCSI controller nd that they're all set up correctly.