In message <[EMAIL PROTECTED]>, Randy Bush writes:

>I attempted to better shield it.  A full description with pretty 
>pictures is at <http://rip.psg.com/~randy/5501-abg.html>.

First off, the motor in the disk is not your only worry, the
head/voice-coil throws significant magnetic fields around as well.

A simple test with the SATA disk over the mini-PCI or away from it
should be able to tell you if that is indeed the path of trouble.

Other potential causes:

Power supply noise when the disk operates.

Radiated noise from cables (Wrapping in alu-foil may make it worse
if you cannot get good grounding for the foil)

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
[EMAIL PROTECTED]         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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