Heads flying above same track for too long

  • Thread starter Thread starter Franc Zabkar
  • Start date Start date
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Franc Zabkar

The following paper makes an observation about heads in a hard drive
flying above the same track for an extended time.

http://delivery.acm.org/10.1145/132...oll=ACM&dl=ACM&CFID=55987317&CFTOKEN=43306914

"Persistent high fly height can also be caused by specific operations.
For example, when not writing or reading, if the head is left to sit
above the same track while the disks spin, lubricant can collect on
the heads. In some cases simply powering down the HDD will cause the
heads to touch down (as they are designed to do) in the landing zone
to disturb the lube buildup."

Since the heads in today's drives are parked on a loading ramp, how is
the problem of lube build-up now being addressed?

- Franc Zabkar
 
Franc Zabkar said:
The following paper makes an observation about heads in a hard drive
flying above the same track for an extended time.
Click to expand...
Since the heads in today's drives are parked on a loading ramp, how is
the problem of lube build-up now being addressed?
Click to expand...

Hi Franc,

there is something called patrol seek... I believe we talked about this
already on this group... Back in the beginning of the 2009.

Here is the link for Maxtor's laboratory experiments...

http://www.thic.org/pdf/Feb06/maxtor.eschreck.060228.pdf


Anyway, patrol seek is that famous meow sound that's often heard from newer
hard drives... It's head repositioning to stop heating the track surface
under it...


--
U rodilistu se prekjucer povrijedjen kruskaog gnjecija.
By runf

Damir Lukic, calypso@_MAKNIOVO_fly.srk.fer.hr
http://inovator.blog.hr
http://calypso-innovations.blogspot.com/
 
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