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?4C DEVINACT, DUA0
http://h71000.www7.hp.com/wizard/wiz_1622.html
"Please check existing discussions of the "serpentine" nature of the
Q-bus module configuration available here in Ask The Wizard such as
topic (1149), ...
This could well be a problem with the Q-bus configuration, with the
disk controller (probably an RQDX3 series controller), with the disk
connection,..."
John A.