OK, I'm stupid. Can anyone out there explain to me why a SCSI hard drive
costs about twice as much as a similiarly sized IDE hard drive? Someone
once told me it was due to the SCSI interface being more expensive to
implement. OK. But isn't the actual hard drive (platters, heads, etc)
the same? So the cost would be "hardware"+"electronics". I can understand
the "SCSI electronics" being more expensive than the "IDE electronics".
but that would imply that difference should be about equal. For instance,
suppose an IDE drive cost is $300. $200 is "hardware" and $100 is
"IDE electronics". As similiar SCSI would be, say $500. $200 is "hardware",
because the "hardware" is nearly identical and $300 is "SCSI electronics".
But wouldn't that mean that a $600 IDE should be $500 hardware + $100
electronics. Implying that a SCSI of similiar size would be $500 hardware
+ $300 electronics = $800 total. But the SCSI generally would be closer
to $1200. What is the $400 for?
Am I all wet when I say that the drive "hardware" is nearly identical
for IDE and SCSI? (assuming the same platters & heads and RPM). Does
SCSI require superior "hardware" (platters & heads). It seems to me
that I've seem the same set of RPM values (5400, 7200, 10000). Why
would a SCSI 5400 RPM need significantly superior "hardware" than
Am I all wet when I say that the "electronics" for an IDE drive are
approximately the same regardless of the size of the drive? Do larger
IDE drives require significantly better IDE electronics? The same
questions for SCSI.
Note - I used the above numbers just as an example, I have NO idea
what the real breakdown is. In fact, since the price per megabyte
seems close to a straight line (except in the really large sizes), I'd
guess that the "electronics" cost is insignificant. I hate to be
negative, but it really seems, to me, that the vendors have said something
like: "We'll price IDE at $X per megabyte and SCSI at $Y per megabyte".
Even if this does not match the cost to manufacture.
Well, enough of my ranting. You may guess I want SCSI but can't afford
If you can enlighten me on this, I really would like to know.