Maker Pro
Maker Pro

Replace magnetic with optical

L

Lostgallifreyan

Jan 1, 1970
0
And plenty of fish to take the bait.

And plenty of fun discussion based on the strange opportunity, if you know
where to look.
 
P

Pat B.

Jan 1, 1970
0
Radium reminds me of certain bright, but uninformed, ten-year-olds
that I have met. Is there a possibility that he has some kind of
condition? Like being autistic or having development issues, or just
being a snot-nosed little prick?


Contrex, I dont hae a problem with his conditions he may have, I do
have a problem of him picking up a magazine and discussing it as if he
had first hand knowledge on the particular topic. I applaud him for
trying to grasp technology and some day he may be good, he just needs
to stop pretending that he has knowledge on the topic. Kid has a ton
of spare time on his hands. Look at his postings, can you imagine if
he spent all that time actually learning about technology...he would
be good. At least he gets people talking :)
 
R

Radium

Jan 1, 1970
0
Radium reminds me of certain bright, but uninformed, ten-year-olds
that I have met. Is there a possibility that he has some kind of
condition?

I've been diagnosed with Asperger's syndrome.
 
R

Radium

Jan 1, 1970
0
"no magnetism, no electricity" = no light

Sorry. I was talking about the use of electricity/magnetism for power,
communication, and storage.

I am aware that light is made of electric and magnetic fields and that
a laser does involve electrons at some level to produce its light even
if the laser is not powered or pumped by electricity.
 
C

contrex

Jan 1, 1970
0
I've been diagnosed with Asperger's syndrome.

Yes, but you might well say that if it wasn't true, as part of the
trollery.
 
A

Alexander Grigoriev

Jan 1, 1970
0
HDD data density is over 10 times more than 50 GB BR disk.

What "risk of cancer" are you talking about? Are you completely clueless,
like dumb blonde?
 
R

Radium

Jan 1, 1970
0
HDD data density is over 10 times more than 50 GB BR disk.

What if -- in my theoretical optical HDD -- the recording/playback
laser is made thinner and the optical platters made the same size as
magnetic platters, and if this optical HDD has the same amount of
platters as magnetic HDD?
What "risk of cancer" are you talking about?

Direct exposure to extremely short-wave radiation can cause cancer.
You know, melanomas, etc. are often associated with frequent exposure
to short-wave UV from sunlight.

As for 400 nm, this is long-wave UV, and if often referred to as
"black light". So 400 nm is safe UV.
 
K

kony

Jan 1, 1970
0
What if -- in my theoretical optical HDD -- the recording/playback
laser is made thinner and the optical platters made the same size as
magnetic platters, and if this optical HDD has the same amount of
platters as magnetic HDD?

LOL

What if - since we're allowed to make up imaginary hardware,
we consider a hypothetical hard drive with thinner platters
about the same size as Texas that spin fast enough to pull
small asteroids in and hold a few Googlebytes each?


Direct exposure to extremely short-wave radiation can cause cancer.
You know, melanomas, etc. are often associated with frequent exposure
to short-wave UV from sunlight.

As for 400 nm, this is long-wave UV, and if often referred to as
"black light". So 400 nm is safe UV.

I take it you don't go outside very often.
 
S

Sam Goldwasser

Jan 1, 1970
0
kony said:
LOL

What if - since we're allowed to make up imaginary hardware,
we consider a hypothetical hard drive with thinner platters
about the same size as Texas that spin fast enough to pull
small asteroids in and hold a few Googlebytes each?

A "thinner" laser is not fantasy. Search for "near field recording".

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.
 
B

BogusID

Jan 1, 1970
0
Radium said:
I've been diagnosed with Asperger's syndrome.


Okee Dokee, shall we presume you are not Schizophrenic then?


Diagnostic Criteria For Asperger's Disorder

A. Qualitative impairment in social interaction, as manifested by at least
two of the following:
1.. marked impairments in the use of multiple nonverbal behaviors such as
eye-to-eye gaze, facial expression, body postures, and gestures to regulate
social interaction
2.. failure to develop peer relationships appropriate to developmental
level
3.. a lack of spontaneous seeking to share enjoyment, interests, or
achievements with other people (e.g. by a lack of showing, bringing, or
pointing out objects of interest to other people)
4.. lack of social or emotional reciprocity
B. Restricted repetitive and stereotyped patterns of behavior, interests,
and activities, as manifested by at least one of the following:
1.. encompassing preoccupation with one or more stereotyped and restricted
patterns of interest that is abnormal either in intensity or focus
2.. apparently inflexible adherence to specific, nonfunctional routines or
rituals
3.. stereotyped and repetitive motor mannerisms (e.g., hand or finger
flapping or twisting, or complex whole-body movements)
4.. persistent preoccupation with parts of objects
C. The disturbance causes clinically significant impairment in social,
occupational, or other important areas of functioning
D. There is no clinically significant general delay in language (e.g.,
single words used by age 2 years, communicative phrases used by age 3 years)

E. There is no clinically significant delay in cognitive development or in
the development of age-appropriate self-help skills, adaptive behavior
(other than social interaction), and curiosity about the environment in
childhood

F. Criteria are not met for another specific Pervasive Developmental
Disorder or Schizophrenia
 
B

BogusID

Jan 1, 1970
0
Radium said:
What if -- in my theoretical optical HDD -- the recording/playback
laser is made thinner and the optical platters made the same size as
magnetic platters, and if this optical HDD has the same amount of
platters as magnetic HDD?


Direct exposure to extremely short-wave radiation can cause cancer.
You know, melanomas, etc. are often associated with frequent exposure
to short-wave UV from sunlight.

As for 400 nm, this is long-wave UV, and if often referred to as
"black light". So 400 nm is safe UV.

What about a 3 dimensional media, like an optical version of the old bubble
magnetic memory with X/Y/Z read/write vectors?
Perhaps then we could have small removable 1/2 or 1 inch cubes that
contained huge volumes of data...
 
F

Fleetie

Jan 1, 1970
0
BogusID said:
What about a 3 dimensional media, like an optical version of the old bubble magnetic memory with X/Y/Z read/write vectors?
Perhaps then we could have small removable 1/2 or 1 inch cubes that contained huge volumes of data...

Holographic memory. It already exists in the lab, and is being
developed, AFAIK.

Followups trimmed a bit.

Martin
 
A

Alexander Grigoriev

Jan 1, 1970
0
Sam Goldwasser said:
A "thinner" laser is not fantasy. Search for "near field recording".

In the same vaporware cathegory.

On a modern HDD platter, a bit takes less than 100*20 nm. What wavelength
you need to focus light to a comparable spot?
 
A

Alexander Grigoriev

Jan 1, 1970
0
Radium said:
As for 400 nm, this is long-wave UV, and if often referred to as
"black light". So 400 nm is safe UV.

In a properly designed optical drive, laser never leaks outside. Anyway, its
power is so low compared to sunlight, that there is no danger in occasional
exposure (other than direct eye exposure).
 
S

Sam Goldwasser

Jan 1, 1970
0
Fleetie said:
Holographic memory. It already exists in the lab, and is being
developed, AFAIK.

I think it's out of the lab and you can buy parts to make them now. See
this month's Electronic Design for spatial light modulator module.

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.
 
B

BogusID

Jan 1, 1970
0
Sam Goldwasser said:
I think it's out of the lab and you can buy parts to make them now. See
this month's Electronic Design for spatial light modulator module.

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above
is
ignored unless my full name AND either lasers or electronics is included
in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.


Yup, that's the stuff!

<http://sbir.nasa.gov/SBIR/abstracts/97/sbir/phase1/SBIR-97-1-24.03-2191.html>
 
B

bealoid

Jan 1, 1970
0
Hi:

Why do hard disc drives use magnetic discs?

Since non-volatile flash RAM chips are not yet feasible for HDD-
substitution, why not replace the magnetic platters with optical ones
that use 400 nm lasers to write, read, erase, and re-write data?

[snip cobblers]

You might be interested in this device:
http://techon.nikkeibp.co.jp/english/NEWS_EN/20050608/105586/
Optware Corp., a developer of holographic data storage systems, is
planning to release a Holographic Versatile Card (HVC) media product
around the end of 2006. The card capacity is expected to be 30 GB. The
company aims to price the product around ¥100. Optware also intends to
set the price of a reader device lower than ¥200,000 and a reader/
writer device lower than ¥1 million. The launch of these HVC-related
products is planned to coincide with the standardization of the
technology, expected in December, 2006, by Ecma International, an
organization promoting standardization of information and
communication technologies. The company also revealed photos of
mockups. Dimensions of the card are almost the same as those of a
credit card, while the drive system is designed to be the size of a
surface-mounted hard disc drive system.

I haven't seen or heard any more of this device.

30 GB in the size of a credit card is good, but I get the feeling that
USB thumb drives will be there soon.
 
K

kony

Jan 1, 1970
0
A "thinner" laser is not fantasy. Search for "near field recording".

It is an idea based loosely on a few technologies still
maturing. Until there is an actual product that allows
abandoning magnetic hard drives as Radium suggests, it is
all just fantasy.
 
R

Radium

Jan 1, 1970
0
It is an idea based loosely on a few technologies still
maturing. Until there is an actual product that allows
abandoning magnetic hard drives as Radium suggests, it is
all just fantasy.


Any chance of replacing electricity -- as a power source -- to 400nm
laser light pumped by D-T fusion in the next 20-30 years?
 
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