What are Seagate platters made of?

Just curious.

I had a Seagate Barracuda 300GB Ver. 7200.8 drive die on me. No
receipt so I took it apart. The platters (three of them) are made of
a fairly soft but rigid metal. Anyone out there know what they're
made of?

Thanks.

Dave Smith wrote:
> Just curious.
>
> I had a Seagate Barracuda 300GB Ver. 7200.8 drive die on me. No
> receipt so I took it apart. The platters (three of them) are made of
> a fairly soft but rigid metal. Anyone out there know what they're
> made of?
>
> Thanks.

Komag used to make platters for other companies. AFAIK, there
have been some recent changes in who owns what, so it is hard
to guess who does it now, or whether it is done in house
(with no web pages to explain it).

http://web.archive.org/web/200708230...y/process.html

At any given time in the market, there could be several generations
of technology in use. So you may find more than one way of
making platters as well.

Paul

[davy]

Have a look here About Hard drives, you'll probably want the third item, 'Platter Substrate Materials'.

I'm not sure about Seagate but platters are either glass or aluminum coated with magnetic grain, see Wilkipedia.

Davy

On Fri, 18 Jul 2008 18:53:42 -0700, Dave Smith
<Sallydog@cox.net> wrote:

>Just curious.
>
>I had a Seagate Barracuda 300GB Ver. 7200.8 drive die on me. No
>receipt so I took it apart. The platters (three of them) are made of
>a fairly soft but rigid metal. Anyone out there know what they're
>made of?
>
>Thanks.


Some type of coated, aluminum alloy base material. Probably
a trade secret. Does it necessarily matter?

kony wrote:

> On Fri, 18 Jul 2008 18:53:42 -0700, Dave Smith
> <Sallydog@cox.net> wrote:
>
>>Just curious.
>>
>>I had a Seagate Barracuda 300GB Ver. 7200.8 drive die on me. No
>>receipt so I took it apart. The platters (three of them) are made of
>>a fairly soft but rigid metal. Anyone out there know what they're
>>made of?
>>
>>Thanks.
>
> Some type of coated, aluminum alloy base material. Probably
> a trade secret. Does it necessarily matter?

Maybe he thinks he'll take them to a scrap yard to get some money.

kony <spam@spam.com> wrote:

> On Fri, 18 Jul 2008 18:53:42 -0700, Dave Smith
> <Sallydog@cox.net> wrote:
>
> >Just curious.
> >
> >I had a Seagate Barracuda 300GB Ver. 7200.8 drive die on me. No
> >receipt so I took it apart. The platters (three of them) are made of
> >a fairly soft but rigid metal. Anyone out there know what they're
> >made of?
> >
> >Thanks.
>
>
> Some type of coated, aluminum alloy base material. Probably
> a trade secret. Does it necessarily matter?

I don't know what else has added to the aluminum but lot of aluminum for
sure. And these are the basic steps just incase the DOG wants to make some
for him/her/it (what the heck do I call DOG?).

1. A bank disc to begin with (RAW)

2. trim it down to the specific thickness

3. grind it down to the specific thickness

4. round the edge

5. Bake in oven for specific time at specific temperature

6. Coating (different formular for different type of disc)

7. Buffing

8. Testing

9. Grading

10. Packing then send to customer.

On Sat, 19 Jul 2008 16:33:33 -0500, VanguardLH <V@nguard.LH> wrote:

>kony wrote:
>
>> On Fri, 18 Jul 2008 18:53:42 -0700, Dave Smith
>> <Sallydog@cox.net> wrote:
>>
>>>Just curious.
>>>
>>>I had a Seagate Barracuda 300GB Ver. 7200.8 drive die on me. No
>>>receipt so I took it apart. The platters (three of them) are made of
>>>a fairly soft but rigid metal. Anyone out there know what they're
>>>made of?
>>>
>>>Thanks.
>>
>> Some type of coated, aluminum alloy base material. Probably
>> a trade secret. Does it necessarily matter?
>
>Maybe he thinks he'll take them to a scrap yard to get some money.

Um... The first line reads "Just curious."

Dave Smith wrote:

> On Sat, 19 Jul 2008 16:33:33 -0500, VanguardLH <V@nguard.LH> wrote:
>
>>kony wrote:
>>
>>> On Fri, 18 Jul 2008 18:53:42 -0700, Dave Smith
>>> <Sallydog@cox.net> wrote:
>>>
>>>>Just curious.
>>>>
>>>>I had a Seagate Barracuda 300GB Ver. 7200.8 drive die on me. No
>>>>receipt so I took it apart. The platters (three of them) are made of
>>>>a fairly soft but rigid metal. Anyone out there know what they're
>>>>made of?
>>>>
>>>>Thanks.
>>>
>>> Some type of coated, aluminum alloy base material. Probably
>>> a trade secret. Does it necessarily matter?
>>
>>Maybe he thinks he'll take them to a scrap yard to get some money.
>
> Um... The first line reads "Just curious."

Curiosity always has a motive.

VanguardLH wrote:
> Dave Smith wrote:
>> VanguardLH <V@nguard.LH> wrote:> >
>>> kony wrote:
>>>
... snip about a Seagate Barracuda 300GB ...
>>>>
>>>> Some type of coated, aluminum alloy base material. Probably
>>>> a trade secret. Does it necessarily matter?
>>>
>>> Maybe he thinks he'll take them to a scrap yard to get some
>>> money.
>>
>> Um... The first line reads "Just curious."
>
> Curiosity always has a motive.

Such as the urge for knowledge.

--
[mail]: Chuck F (cbfalconer at maineline dot net)
[page]: <http://cbfalconer.home.att.net>
Try the download section.

"CBFalconer" <cbfalconer@yahoo.com> wrote in message
news:4882C8EB.441C33F6@yahoo.com...
> VanguardLH wrote:
>> Dave Smith wrote:
>>> VanguardLH <V@nguard.LH> wrote:> >
>>>> kony wrote:
>>>>
> ... snip about a Seagate Barracuda 300GB ...
>>>>>
>>>>> Some type of coated, aluminum alloy base material. Probably
>>>>> a trade secret. Does it necessarily matter?
>>>>
>>>> Maybe he thinks he'll take them to a scrap yard to get some
>>>> money.
>>>
>>> Um... The first line reads "Just curious."
>>
>> Curiosity always has a motive.
>
> Such as the urge for knowledge.
>
> --

Perhaps:

http://www.instructables.com/id/Buil...g-hard-drive-/

http://hackedgadgets.com/2006/05/26/...tesla-turbine/

http://www.greenoptimistic.com/2008/...rd-disk-drive/

Luck;
Ken