[kochi_hw_club] hard disk myths- part 2
- From: Sameer Thahir <sameerthahir@xxxxxxxxx>
- To: kochi_hw_club@xxxxxxxxxxxxx
- Date: Wed, 30 Jun 2004 11:27:29 -0700 (PDT)
dear hardware club members
hope u found the last mail interesting , heres the
rest of it
...............................................
Myth 5:If your hard disk has bad sectors ,formatting
will cause more bad sectors
Truth:If your hard disk has bad sectors from recurrent
head crashes ,then the number of bad sectors is
GUARANTEED to increase as time goes by.The reason for
the increased no. of bad sectors when you format the
hard disk is because formatting
your hard disk reveals the new bad sectors!don't
forget ,when you format the hard disk,the format
utility will check for and reveal the new bad sectors.
So,formatting will not increase the no. of bad sectors
in a failing hard disk.It just reveals what's going
on.
...................................
Myth 6:Downloading too much "stuff" from the internet
will reduce your hard disk's life span
Truth:Downloading "stuff" into your hard disk all the
time will not reduce your
hard disk's lifespan.
Remember,your hard disk is continuosly spinning even
when it is not reading or
writing .As long as it is spinning ,it is just as
likely to die when it is idling
as it is when it is reading or writing data.
...................................
Myth 7:Insufficient power causes bad sectors in hard
disks.
Truth:Insufficient power or power cuts won't create
bad sectors in your hard disk
Whenever there is not enough power or a power cut ,the
head actuators automatically
park the heads so that there is no risk of head
crashes on the platters.
So ,there is no way insufficient power can cause bad
sectors
...............................................
Myth 8:Cheap power supplies will slowly kill your hard
disk
Truth:Cheap power supplies wii NOT "slowly kill" hard
disk,it kills the hard disk instantly.
if it cannot provide enough power,your hard disk won't
run properly or just plain won't run at all
..............................................
Myth 9:If your hard disk keeps spinning up and down
,that is because the power
supply sometimes has enough power to spin up the hard
disk and sometimes ,it cannot provide enough power and
the hard disk spins down again.
Truth: If there is a loss of power or insufficient
power to the hard disk,it will power down and cause
the computer to hang.Even if power is restored ,the
hard disk won't resume operation like nothing
happened.You will need to reboot the compouter.
The spin-up,spin-down activity is actually a symptom
of the hard disk's recalibration process.
.....................................
Myth 10:Head parking is the cause of loud clicks from
your hard disk
Truth:That can either be a symptom of the hard disk's
thermal recalibration process or it can be due to head
crashes on the platters.
.......................................
Myth 11:The head actuators are powered by a motor that
can fail due to excessive use
Truth:Current head actuators are actually not powered
by any motor .
Yes ,in the past head actuators were powered by a
stepper motor.But current head actuators use the
voice coil mechanism which uses electro magnetic
force to move the heads. So if the head actuators are
not powered by any mechanical motor,how can "its
motor" fail?
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