Let's see. The FAQ entry for pump errors lists a several possible causes:

1. Corrupted ".upgrade" file.

Which upgrade file are you using?

2. Serial port/cable problems.

Your boot log looks fine so I'm guessing you have a working serial cable with which to retrieve that boot log. However, it doesn't completely rule out an intermittent serial cable problem, or perhaps a problem with sending data but not a problem receiving it.

3. Bad disk drive.

You have ruled that out by trying three disk drives.

4. Other hard disk troubles.

Aha, now here's the likely culprit. You say you checked the cable connections, but how certain are you that the IDE header is good and isn't getting the cracking joints problem? Or perhaps theres a problem with the drive interface electronics. I'm guessing it's one of those. This theory is supported by three pieces of information:

- You'd had NO HARD DISK FOUND errors to begin with.
- You have the same trouble no matter which disk you plug in.
- Your boot log indicates a bitwise error in its IDE tests:
ide_data_test: wrote 0xaaaa read 0xabaa
ide_data_test: wrote 0x5555 read 0x55d5