3 Jan
2005
3 Jan
'05
2:48 a.m.
From: "Barry Watzman"
<Watzman(a)neo.rr.com>
---snip---
SOMETIMES, the problem is that the lubricant used on the platter surface
has, over time, effectively "glued" the heads to the platter, a problem
called "stiction".
Hi
Actually the surfaces have no lubrication at
all. I had a couple of friends that worked at Seagate
during the stiction problems. It was caused by the surfaces
being too smooth. When the platter stopped rotating,
the air would be squeezed out from between the two
and they would become stuck together. They solved the
problem on later drives by making the platters surface
have a specific amount of roughness.
Machinist that work with gauge blocks understand the
stiction issue. When stacking the blocks they become
stuck together and they have to be forced apart.
Dwight
3 Jan
3 Jan
4:17 a.m.
At 08:48 AM 1/3/05 -0800, you wrote:
Well you're partially correct. The blocks that you're referring to are
calling gauge (or gage) blocks or Jhohassen blocks (not sure of the exact
spelling). But they don't have to be "forced" apart, merely slid apart.
It's difficult to pull them away from each other but they slide apart
easily. If the drive problem is due to the same thing then the heads should
slide (or rotate) just as easily. I've looked at a couple of drive platters
that had sticktion problems and there definitely seems to be wax or
something holding the heads to the platters.
Joe
From: "Barry Watzman"
<Watzman(a)neo.rr.com>
---snip---
SOMETIMES, the problem is that the lubricant used on the platter surface
has, over time, effectively "glued" the heads to the platter, a problem
called "stiction".
Hi
Actually the surfaces have no lubrication at
all. I had a couple of friends that worked at Seagate
during the stiction problems. It was caused by the surfaces
being too smooth. When the platter stopped rotating,
the air would be squeezed out from between the two
and they would become stuck together. They solved the
problem on later drives by making the platters surface
have a specific amount of roughness.
Machinist that work with gauge blocks understand the
stiction issue. When stacking the blocks they become
stuck together and they have to be forced apart.
7293
days inactive
7293
days old
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