Easy Hard Drive Data Recovery Part 1

complete tutorial on hard drive data recovery

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Closed Caption:

the higher body I did a speech last year
here
anybody see that ice pretty good
yet last year after I did the speech air
and the material started flowing around
and some others on YouTube on their
internet things over actually find the
videos i sorry get some phone calls
from data recovery companies in other
data recovery people
who were a little pests of to say the
least
they're like hey this is trade secrets
you like ruining our industry
and you know all the stuff that's a
thats
you're telling people to help them
recover their desk is just gonna hurt us
as a whole
and I made it pretty clear to them that
the whole point was that
if your data is worse a more than
anywhere between 600 and a thousand
dollars
and you wanted to do something with it
you should send out of two professional
company because
there's a good chance you're gonna mess
it up especially this is the first time
that you're doing something
and the second point that I tried to
make him is that most this up that
people are doing
is they're not gonna spend two thousand
dollars to try to get their data back so
I want to try to help them do their own
recovery
and actually get somewhere and I've had
a lot of people of had allowed the
response from people actually done this
so in response to their request for me
not to ever do any more materiel
but I'm here it's bigger and better and
more advanced stuff and I'm actually
gonna follow a theme this time
so where thanking so let's make sure
this is gonna learn
home
a
I tell you have heard the story way more
than once
and
do
so this is the most common question that
I get so I'm gonna try to take
to me the most common questions that
I've got as I did all the presentation
stuff last year
I'm not really going to duplicate but
maybe five percent what I did last year
so the videos are out there if you go to
my heart God I dot com they're actually
published I have it or conduct on one up
there
their little bit different there's more
material animal in a duplicate about 5
percent here because it pertains to this
particular problem
and in the second question that I had
all the time was about multi planners
last year I said you can't do I recovery
with a single platter
I met you as a general audience just
without any special tools because my
whole presentation is about
not have no special tools except for
this one thing we're actually has to do
with the multiplier
so many go into that but but this is a
common problem that I get a question for
as was that clicking noise
the problem with the clicking noises
that is not a simple problem
it actually is based on four different
types of problems
that all have the same affect so let's
go through those
between basically what we're gonna be
talking about here
is going to be the area that says the
actuator arm
where the head the area the head
actuator arm and then
down through the logic board so we're
gonna be focusing on
how that is affected and what happened
and there's an item on their this call
the preamp
so many go through those pieces the very
first thing that happens when you power
on your hard drive
as that the hard drive has to do like a
self-check
and actually checks to make sure all
that's it electronics are there
that all the pieces are functioning
properly before actually proceeds to do
anything else
once that has successfully completed
it will go ahead and say hey I wanna
spend up the motor and to spend all
start to spend
the motor spending is a very important
process for the heads because the motor
spending
is what causes what's called an air
bearing their bearing
causes the head to float and that's what
actually allows you to move your head
over the platter
but it does one other thing which is on
the left there blinking red you'll see
that there's a locking pin their
is actually just look he's a plastic
just heaters out of the way
when the airflow is strong enough to
push in
so what's the plan to start to spin up
in a move that other way
which unlocks the arm so that it can
move over the platter
so as soon as it starts to do that
it will start
unmount the head once the head has an OK
and then it causes it to fly
over the platter so this is what's going
to keep that going
then the head actually has to go and
read what's called the servo timing
the servo timing is a mechanism on the
drive that is
like geographic information its gonna
tell the head
where it is over the platter at any
point in time
so reads that information from the
platter and then it starts to read
firmware
on the platter the platter will all
actually have contents on it and each
manufacturer can specify certain things
they want to do with this
platter in store in content so if there
is some special test routine
they will write that content typically
on the platter so that they don't have
to make adjustments or change the board
every time something changes they can
just make a change to that content on
the platter
so the way they do this is with
something is called system area
so every manufacturer has their only
specific system area
and this is what makes it really
difficult to do any kinda recoveries
if you have damage here because
everything a specific to a manufacturer
and sometimes to a model so in order to
repair this
you can imagine that it's kinda like
getting a firmware update for your board
is like they're all specific they're all
gonna be individual and they're all
going to be even more specific my model
the most have you heard the have made in
his tracks are negative cylinders on
your drive
and they typically are numbered
negatively so you will have
i0 track will start where your data is
and everything else before that is
actually a negative number and they can
have
but a time negative tracks but typically
look at something in the range like 20
negative tracks
be this is the type of content
that's in the essay area now in the data
recovery world
this is called the UBA block and this
utility block addressing
and each one up the UBA blocks is a
module
so smart Data most if you know what that
is is actually a spot on the platter and
that negative area where can store the
smart Data
some drives store the serial number
there some them actually still have them
on the boards the PCB boards
so if you're gonna change something out
there's a specific reason why I'm
telling you
about these particular items though and
as I go through the recovery process
you'll see why these items are important
to be less than the G last
but some other firmware overlay code is
important if you got special tools to
recover the data
and then you have all your server
parameters and your test routines
this is what are you be a blot looks
like basically what they did is hot your
drive has sectors on it ni sectors 512
bytes
while when they decided that they wanted
to have a utility block
they don't want to have to say I have
seven sectors for this block
so they came up with a what they call
the UBA block
and so you be a block is where they
define that now it able they say
on this drive for your bad block last
maybe I have three sectors
and for this one for the drive I D I
only have two sectors
and manufacture can change this at will
and then they don't have to change in
either code
to read what is happening on the drive
they just change in size
the UBA block so it makes a little bit
easier for them and you can actually
address the UBA blocks
using certain special equipment this
says I wanna go free but the bad bought
less table is
and pull that up this is an example this
doesn't mean that is in a written in
stone in
everybody's is different and every drive
is different
be so
the system area has this thing that's
called the P less than the G list
most people know that they have a bad
blacklist the thing is is that you have
more than one bad block list
you have to bad block less there's a
really important reason that you need to
know that he had these two bad block
less
and again when I get to the data
recovery section also you have to do
what's called a lot PCB swap
and if you had this loaded you'll have
to know that a has changed and what to
do about it
so the P list is the primary last
when they manufacture the hard drive
they scanned it format it did a number
different thanks to the drive
to test it and everything that came up
as a bad block me one had buttons list
so the primary list is a permanent lest
it doesn't change
you know you don't normally a race it
there are special tools that you can use
to raise it
and energy listed the bad block list
that you know what
that's called growing list and that's
where all the sectors
they have problems while you're reading
writing to your drive are written to
and that can actually be cleared you can
do a number different things with that
or test and add to the list the problem
is is that
if a if they drive head has not read and
written
to a particular sector in a long time
the environmental aspects at that desk
in change
and a sector can go bad and it won't be
added to the bad block list you'll
actually get like
my heart that doesn't boot it just dies
and
you have a number different problems and
those are the kind of things where with
the
we're doing different ways recovery you
can actually get the sector's back to
rebuild the sectors