Franc Zabkar said:
This Seagate forum thread shows inferior performance results for
Barracuda drives installed vertically as opposed to horizontally:
http://forums.seagate.com/stx/board...iew=by_date_ascending&message.id=17546#M17546
Can anyone offer a reason for the difference?
BTW the results are repeatable over several drives, so it appears to
be a design issue.
Hi Franc,
this is something I've never heard of! In fact, all drives I've heard about
had no problems with mounting, either vertical or horizontal...
But, if there is a problem with random seek time that's rapidly rising when
in vertical position, then the possibility I can think of right now is that
weaker magnets or magnetic field in voice coil of the actuator are used...
The mentioned drives are all using perpendicular technology for surface
recording, and since the tracks are much closer to each other, maybe there
could be some gravitational or simply actuator momentum issues...
And one more possible explanation... Preamplifier for the signal coming from
the read/write heads is on these type of drives glued, not soldered... So,
maybe there is a design flaw and glue is not holding the preamplifier chip
as it's supposed to... Especially in vertical position and if drive is a bit
hot...
And then, the clicking sound, it's caused when acutator arm hits the inner
most part of the platter... Could be that there is a positioning problem
because of the weak magnet/voice coil or bad preamplifier (signal is not
detected, and there is no feedback, so the control unit of the disk drive is
sending the actuator arm all around to try to find so called servo burst
info to calculate a position)...
I'd bet on this last one, but anything is possible...
--
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ugnjetavu. "Nisam ja nikog bombardiro !" rece salataa pipa "Ja samo
povjesnicaro zigoshe bodljikavm !" By runf
Damir Lukic, calypso@_MAKNIOVO_fly.srk.fer.hr
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http://calypso-innovations.blogspot.com/
