PROPOSITION of NEW DATA STORAGE DEVICES TECHNOLOGIES
Ivan Bugaenko


TECHNOLOGY Nr.1
Ukrainian patent Nr.6712 (patent issued Feb.20, 2005)

Technology is in allocation of read/write heads (4) on the rotating platform (disk) (3). This disk is to be placed above the contrarotating store-disk (1).

 

As a result, the speed of head movement comparatively to the store-disk increases. It's explained by the aggregated rotation speed of store-disk and platform. It increases read/write speed without the store-disk rotation speed augmentation.

Moreover the store-disk could be the platform-disk at the same time.

 

TECHNOLOGY Nr.2

Ukrainian patent Nr.7909

Technology is in making the positioner (3) in the form of a lath that is arranged along the store-disk (1) radius. Multitudes of heads (4) are closely spaced along the full length of the lath.

 

To read/write data from/to any disk area (5) the closest head (4) of all placed on the platform is moved to this area. As a result the platform should be moved on very small distance that equals V2 of distance (h) between heads.

 

 Moreover, radial head movement, unlike head movement along the arc additionally decreases positioning time and makes calculating electronics simpler.

The compactness of this technology allows to place several positioners (3) above one disk surface.

It provides reading/writing of data from/to several disk areas (5) at the same time (multithreading). At the same time the store disk could be the platform-disk that bears several positioners.

 

TECHNOLOGY Nr.3

Ukrainian patent Nr.6864

According to this technology the positioner (3) is made in the form of a lath with multitudes of heads (4) that are closely spaced along its full length. But every head has its' own microdrive (6) (for example piezoelectric cell).

 

It provides reading/writing of data from/to several disk areas at the same time (multithreading) without whole positioner movement. If the quantity of heads equals or approaches to the quantity of disk tracks, the device speed increases rapidly. Placing several positioners above the disk surface accordingly multiplies reading/writing speed. It improves the simultaneous access to the highest degree.

 

TECHNOLOGY EVOLUTION


Introduced technologies could be introduced in several phases. Some of them could be realized very easily. And it may take some time to begin production of more complicated but much more improved devices.

 

PHASE 0

Used technology: Technology Nr.2

Description: Standard positioner is replaced by the new one.

New abilities:

-     each disk side has its' own positioner. As a result the data stream could be divided in two or more streams (like in RAID Level 0 technology). Each of those streams should be read /written from/to different side. (Speed doubles).

-     positioning system simplification

-     heads positioning acceleration

-     the capability of simultaneous access to several disk areas (multithreading capability)

-      reduction of power consumption

-      reduction of heat emission

-      noise reduction

-      device downsizing

-      vibrostability increasing

Data stream could be divided in two or more streams (like in RAID Level 0 technology)

 

 

For optical drives this technology may be realized (r/w heads may be made) in this way:

In this case positioning time equals zero. Positioner just have to keep every photon crystal (head) directly above its' track.

Here are some examples of this technology using:

Example 1 Hard Disk Drive With 1 disk

1 head r/w speed (Mbps)

200

Multiplication factor 1 (surfaces or data streams quantity)

2X

Total r/w speed (Mbps)

400+

+ new abilities :

 

 

 

Example 2 Hard Disk Drive With 4 disks

1 head r/w speed (Mbps)

200

Multiplication factor 1 (surfaces or data streams quantity)

8X

Total r/w speed (Mbps)

1 600+

+ new abilities:

 

 

 

PHASE 1

Used technology: Technology Nr.2

Description: More than one positioner is arranged above one disk surface.

New abilities:

- Data stream could be divided in two or more streams (like in RAID Level 0 technology or by another algorithm) for one surface. Data streams quantity equals the quantity of positioners. As a result, r/w speed rapidly multiplies.

You may use the following formatting method to improve this technology:

Here are some examples of this technology using:

Example 1 В Hard Disk Drive With 1 disk and 16 positioners on surface

1 head r/w speed (Mbps)

200

Multiplication factor 1 (surfaces quantity)

2X

Multiplication factor 2 (positioners quantity)

16X

Total r/w speed (Mbps)

6 400+

+ new abilities :

 

 

 

Example 2 В Hard Disk Drive With 4 disks and 16 positioners on surface

1 head r/w speed (Mbps)

200

Multiplication factor 1 (surfaces quantity)

8X

Multiplication factor 2 (positioners quantity)

16X

Total r/w speed (Mbps)

25 600+

+ new abilities :

 

 

PHASE 2

Used technology: Technology Nr.l, Technology Nr.2

Description: Several positioners above one disk surface are allocated on the rotating platform (disk). This disk is to be placed above the contrarotating store-disk.

New abilities:

-   The speed of head movement comparatively to the store-disk increases.

It's explained by the aggregated rotation speed of store-disk and platform.

-   The store-disk could be the platform-disk at the same time.

For more details please view Technology Nr.1 and Technology Nr.2 descriptions and the following figures:

 

Example 2 В Hard Disk Drive With 5* disks and 16 positioners on surface

1 head r/w speed (Mbps)

200

Multiplication factor 1 (surfaces quantity)

10X

Multiplication factor 2 (positioners quantity)

16X

Multiplication factor 3 (contrarotating disk)

2X

Total r/w speed (Mbps)

64 000+

+ new abilities:

 

* 10 surfaces (view the figure with 6 disks)

 

 

 

PHASE 3

Used technology: Technology Nr.l (optional), Technology Nr.3

Description: the positioner is made in the form of a lath with multitudes of heads that are closely spaced along its' full length. But every head has its' own microdrive (for example piezoelectric cell). Placing several positioners above the disk surface accordingly multiplies reading/writing speed.

New abilities:

-   The speed of head movement comparatively to the store-disk increases.

It's explained by the aggregated rotation speed of store-disk and platform.

-   The store-disk could be the platform-disk at the same time.

-      Reading/writing of data from/to several disk areas at the same time (multithreading) without whole positioner movement. If the quantity of heads equals or approaches to the quantity of disk tracks, the device speed increases rapidly.

If the head size is 0,5 mm and tracks density is 10 000 tracks per mm, then to fill up all disk (for example 90 GB per one side) every head should record 5 000 tracks. Let the head repositioning time be equal to one track record time. If disk rotation speed is 10 000 rpm then heads should finish their tasks in: 5 000 (tracks) * 2 (repositioning time) / 10 000 (disk rpm) = 1 minute. It equals 60 seconds. So data transfer rate is: 90 (GB) / 60 (sec) = 1,5 GB per second per each disk surface. If surfaces and/or positioners quantity is more than one then the data transfer rate will multiplies. Here are some variants of this technology using:

Head size (mm)

0,5

0,5

0,5

0,5

0,25

0,25

0,25

0,25

Approximate tracks per mm density

10 000

10 000

10 000

10 000

10 000

10 000

10 000

10 000

Disk rotation speed (rpm)

10 000

10 000

20 000

20 000

10 000

10 000

20 000

20 000

Technology Nr.1 used

No

No

Yes

Yes

No

Yes

Yes

Yes

Qty of surfaces

1

2

2

10

1

2

2

10

Positioners per one surface Qty

1

1

8

8

1

1

8

8

R/w speed (GB per second)

1,5

3,0

48,0

240,0

3,0

6,0

96,0

480,0

 

 

 

Head size (mm)

0,5

0,5

0,5

0,5

0,25

0,25

0,25

0,25

Approximate tracks per mm density

10 000

10 000

10 000

10 000

10 000

10 000

10 000

10 000

Disk rotation speed (rpm)

15 000

15 000

30 000

30 000

15 000

15 000

30 000

30 000

Technology Nr.1 used

No

No

Yes

Yes

No

No

Yes

Yes

Qty of surfaces

1

2

2

10

1

2

2

10

Positioners per one surface Qty

1

1

8

8

1

1

8

8

R/w speed (GB per second)

2,25

4,5

72,0

360,0

4,5

9,0

144,0

720,0

 

 

As you see, theoretically, these technologies have great future prospect. The data transfer bus and other electronics allowing the transfer of 720 GB per second do not exist at the present day. Probably the phase 3 will gain its' significant development due to supercomputers.