9 Sep
2012
9 Sep
'12
11:22 a.m.
it never has.WD uses it today in it's latest technology 3TB drives.rather aggressive
head parking feature, if the drive is idle for 5 seconds,it parks the heads.and
there's no way to avoid this or alter the behavior,this accounts for a LCC count of
about 8k per 24 hour period on average use.which means when you reach the LCC count of
300K, the drive is dead.
what a wonderfully stupid idea.
Date: Sun, 9 Sep 2012 17:51:13 +0000
From: alexeyt at freeshell.org
To: cctalk at classiccmp.org
Subject: Why 'park' drive heads Re: Win (or lose) 3.10 (Was: Kaypro PC ? == Micro
1
On Sun, 9 Sep 2012, Fred Cisin wrote:
Yes. MS-DOS had NO shutdown procedure at all.
Even when hard disk
arrived (DOS 2.00), "PARK" programs were third party! (could be done in a
few dozen bytes) IBM had a park program on their DIAGNOSTICS DISK, but
MICROS~1 never pro0vided one. Q: Does shutdown on Windoze9x park the
heads? properly?
So, what drives actually need to be 'parked'? My understanding was that if
you de-energize the spindle motor and the voice coil that positions the
heads and the same time, the heads will have plenty of time to retract and
lock before the platters slow down enough for the heads to land. Was it
only needed on drives that used stepper motors for head positioning?
Either way, in what technology generation and/or time frame did the
requirement go away?
Alexey