William L. Maltby wrote: > On Fri, 2006-09-22 at 13:06 -0400, Bowie Bailey wrote: > > Cian Cullinan wrote: > > > <snip> > > > The problem does sound external to the disks. Someone else > > suggested the power supply. I wouldn't suspect both cables to have > > problems, so that's probably not an issue. > > Have you looked inside the PS? What you think of a separate cables may > be joined at the base in the PS. And then if one cable has a high > resistance short, it affects voltage on both legs. And if the output > tap feeding those two wires (even separate wires on the same "bus" or > "tap" are "joined at the base" electrically speaking) has a problem > ... it appears on both wires. > > That said, *usually* problems in the wires are "opens" and you just > lose that one "leg". I was actually referring to the SATA cables. I guess my reply got a bit garbled there. One topic at a time... :) I take your point regarding the power supply cables. I'll put the drives on separate legs and see what happens. -- Bowie