Re: Harddisks: Seek, Read, Write, Read, Write, Slow ?

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From: Nathan McNulty (525676_at_betaweb.com)
Date: 07/14/04 

Date: Wed, 14 Jul 2004 14:50:29 -0700

1. Yes really. You cannot read and write at the same time. The command
has to be either read or write.

2. Hardware limitation that it cannot read and write at the same time.

3. From what I have seen on my old harddrives I have taken apart and
what I have read, there is a tip on the head that prevents the magnetic
part from affecting nearby sectors. I was under the impression these do
not always stay in the same position but are required to move each time
a write process is initiated.

4. Again, the tips would have to move back to their resting position.
Maybe this is just old hardware (especially since my books are all very
old) or maybe I've read it wrong, but that was my understanding of how
that part worked.

Nathan McNulty

Ron Reaugh wrote:

> "Nathan McNulty" <525676@betaweb.com> wrote in message
> news:OauKdFeaEHA.1048@tk2msftngp13.phx.gbl...
>
>>Actually, what is happening is that the heads on the platter need to
>>reconfigure themselves each time you read or write.
>
>
> Not really.
>
>
>>It is a hardware
>>limitation.
>
>
> What limitation is that exactly?
>
>
>> By reading, the head can stay in the same location, but
>>once it is told to write, the head has to position itself to change the
>>magnetism of the sector of the platter it is on.
>
>
> That's false.
>
>
>> Then once you request
>>to read again, the head has to move again.
>
>
> Not necessarily.
>
>

Relevant Pages

  • Re: Harddisks: Seek, Read, Write, Read, Write, Slow ?
    ... Hardware limitation that it cannot read and write at the same time. ... there is a tip on the head that prevents the magnetic ... >>magnetism of the sector of the platter it is on. ...
    (alt.comp.lang.borland-delphi)
  • Re: Harddisks: Seek, Read, Write, Read, Write, Slow ?
    ... what is happening is that the heads on the platter need to ... It is a hardware ... limitation. ... once it is told to write, the head has to position itself to change the ...
    (microsoft.public.windowsxp.hardware)
  • Re: Harddisks: Seek, Read, Write, Read, Write, Slow ?
    ... what is happening is that the heads on the platter need to ... It is a hardware ... limitation. ... once it is told to write, the head has to position itself to change the ...
    (alt.comp.lang.borland-delphi)
  • Re: Harddisks: Seek, Read, Write, Read, Write, Slow ?
    ... >> reconfigure themselves each time you read or write. ... >> It is a hardware limitation. ... >> once it is told to write, the head has to position itself to change the ... >> magnetism of the sector of the platter it is on. ...
    (alt.comp.lang.borland-delphi)
  • Re: Harddisks: Seek, Read, Write, Read, Write, Slow ?
    ... >> reconfigure themselves each time you read or write. ... >> It is a hardware limitation. ... >> once it is told to write, the head has to position itself to change the ... >> magnetism of the sector of the platter it is on. ...
    (microsoft.public.windowsxp.hardware)