[plug] server failing with bizarre disk errors

[Craig Ringer]

> If you find out what it is, please let me know, all I can tell you is that
> unplugging and replugging the cables, and replacing them doesn't work. (for
> me anyway) Maybe moving to another IDE controller will help. I've been
> having these insurmountable opportunities for close to 2 years - goes away
> for a while, and then strikes at full strength.

Already tried a cable change.

Out of interest, what chipset and hdds do /you/ use? Mine are all 
western digital JBs, an 80g and a 120g in this machine.

This honestly doesn't look like anything as simple as "bad drive". I've 
had 3 servers do this in 6 months ( a succession in fact ) and have 
replaced drives, RAM, motherboards, CPUs, cables, PSUs  - everything.

This is only the latest machine to do it. What's worse - my home machine 
is showing signs of going the same way, but in its case there are 
clearly identifiable drive issues (two unreadable files that cause DMA 
timeouts and CRC errors. When overwritten with zeros, problem goes away).

I've heard of laptops doing stuff like this with dodgy PM, which is why 
I've disabled power management - no change.

Craig