ABSTRACT
Combination of equations 1 and 2 is known as Omoroghomwan's Hard Drive Integrity Tests.
FIELD SAMPLES
Table l. Authentic and fake data storage device capacities.
There is an ever increasing need for storage of soft data
hence the necessity for portable detachable memory devices. The unfortunate
thing is that many of the Memory Cards and Flash Drives have been hacked to
bear false higher data storage capacities than their true sizes. This write up presents a method and formula to differentiate between the real and the fake ones. Samples of different authentic and fake storage device memories were taken and compared with the specified sizes in order to get their relationships. It is recommended that we go to the
place of purchase with a means of reading the memory capacity in order to reduce
disagreements between the seller and buyer.
INTRODUCTION
Losing vital documents is one of the most painful ordeal
someone could go through in life. It is even worse if the data belong to a third party.
Yet it is unimaginable if it belong to the organization where one works.
I once lost very
vital documents and accused someone wrongly due to fake memory card. This led
to this research with the aim to serve as a guide on how to separate the good
from the bad memory cards.
OMOROGHOMWAN'S INTEGRITY TESTS PROCEDURE FOR DATA STORAGE DEVICES
Insert your portable memory device into a computer or phone
to see the usable space.
Let the usable (writable) memory be Y.
lt is a known fact that this value is always less than the
specified size. This is due to the fact that the memory device will need some
of the memory space for its internal operations (this is its read only memory -
ROM).
Let the specified Memory size be X
IF X/1.024≈Y - - - - - - - - 1
THEN the data storage device is fake.
On the other hand;
IF X/1.083≈Y - - - - - - - - 2
THEN the data storage device is original.
Combination of equations 1 and 2 is known as Omoroghomwan's Hard Drive Integrity Tests.
FIELD SAMPLES
Table 1. below shows the relative differences in the
writable memories of fake and authentic memory devices.
S/N
|
Specified Memory, X (GB)
|
Authentic Writable Memory, Ya(GB) (X/1.083)
|
Authentic Memory Disk Samples (GB)
|
Fake Writable Memory, Yf (GB) (X/1.024)
|
1
|
1
|
0.923
|
0.93, 0.9476
|
0.98
|
2
|
2
|
1.846
|
1.8817, 1.876, 1.8
|
1.95
|
3
|
4
|
3.693
|
3.6, 3.7
|
3.9
|
4
|
8
|
7.386
|
7.27, 7.38
|
7.8
|
5
|
16
|
14.773
|
14.83
|
15.6
|
6
|
32
|
29.547
|
29.5
|
31.3
|
7
|
64
|
59.095
|
59.45
|
62.5
|
CONCLUSION
It is no longer news that the market is already contaminated with fake memory cards and flash
drives carrying false data sizes. We are better equipped to avoid the trauma
that follows such harrowing experience with the information in this write up.
RECOMMENDATIONS
From experience, it has been observed that memory devices of
higher capacities (from 4GB) are more prone to counterfeiting. It is therefore
recommended that any buyer of such should be vigilant and perform the outlined
tests at the point of purchase either with a mobile phone or a computer in
order to ascertain the integrity of the external memory device.
REFERENCES
REFERENCES
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