Posted by Mrcheerful on June 6, 2010, 11:27 am
Jeff The Drunk wrote:
> On Sun, 06 Jun 2010 11:06:09 -0400, Ralph Mowery wrote:
>>> Have tried using the strongest cuboard magnet I can find (In north
>>> London u.k.), but if the wind picks up surprisingly it will just not
>>> hold. Also
>>
>> The magnet out of a hard drive is flat and very strong.
> Really? What kind of hard drive has a big flat magnet inside? That
> defies all logic on the principals of how a hard drive works.
ordinary IDE, the magnet is so strong that it is hard to get off a flat
metal surface without tools!!!
Posted by Jeff The Drunk on June 6, 2010, 11:31 am
On Sun, 06 Jun 2010 16:27:12 +0100, Mrcheerful wrote:
> Jeff The Drunk wrote:
>> On Sun, 06 Jun 2010 11:06:09 -0400, Ralph Mowery wrote:
>>
>>>> Have tried using the strongest cuboard magnet I can find (In north
>>>> London u.k.), but if the wind picks up surprisingly it will just not
>>>> hold. Also
>>>
>>> The magnet out of a hard drive is flat and very strong.
>>
>> Really? What kind of hard drive has a big flat magnet inside? That
>> defies all logic on the principals of how a hard drive works.
>
> ordinary IDE, the magnet is so strong that it is hard to get off a flat
> metal surface without tools!!!
Well I guess you learn something new every day. I would think a magnet
anywhere near the metal recording medium where the data lives would wipe
it out.
Posted by John on June 6, 2010, 11:55 am
> On Sun, 06 Jun 2010 16:27:12 +0100, Mrcheerful wrote:
>> Jeff The Drunk wrote:
>>> On Sun, 06 Jun 2010 11:06:09 -0400, Ralph Mowery wrote:
>>>
>>>>> Have tried using the strongest cuboard magnet I can find (In north
>>>>> London u.k.), but if the wind picks up surprisingly it will just not
>>>>> hold. Also
>>>>
>>>> The magnet out of a hard drive is flat and very strong.
>>>
>>> Really? What kind of hard drive has a big flat magnet inside? That
>>> defies all logic on the principals of how a hard drive works.
>>
>> ordinary IDE, the magnet is so strong that it is hard to get off a flat
>> metal surface without tools!!!
> Well I guess you learn something new every day. I would think a magnet
> anywhere near the metal recording medium where the data lives would wipe
> it out.
Since Faraday all motors use magnets!
Posted by Jeff The Drunk on June 6, 2010, 12:14 pm
On Sun, 06 Jun 2010 16:55:57 +0100, John wrote:
>> On Sun, 06 Jun 2010 16:27:12 +0100, Mrcheerful wrote:
>>
>>> Jeff The Drunk wrote:
>>>> On Sun, 06 Jun 2010 11:06:09 -0400, Ralph Mowery wrote:
>>>>
>>>>>> Have tried using the strongest cuboard magnet I can find (In north
>>>>>> London u.k.), but if the wind picks up surprisingly it will just
>>>>>> not hold. Also
>>>>>
>>>>> The magnet out of a hard drive is flat and very strong.
>>>>
>>>> Really? What kind of hard drive has a big flat magnet inside? That
>>>> defies all logic on the principals of how a hard drive works.
>>>
>>> ordinary IDE, the magnet is so strong that it is hard to get off a
>>> flat metal surface without tools!!!
>>
>> Well I guess you learn something new every day. I would think a magnet
>> anywhere near the metal recording medium where the data lives would
>> wipe it out.
>>
>>
> Since Faraday all motors use magnets!
Not all use permanent magnets. The majority of small direct current
motors yes use permanent magnets. But they rely on an armature with wound
coils and a commutator with brushes to function. You wouldn't find that
in todays drives. The spindle motor is a pulse driven 3 phase motor.
The head actuator is a stepper motor. I wasn't aware there were strong
magnets inside the drive. The base of the spindle inside the drive would
have to contain the magnet. The base outside would contain the coils for
driving the spindle plus a voice coil for data. Also there is a fluid
bearing between magnet and coils on all newer drive over 5400 RPM.
Posted by js.b1 on June 6, 2010, 12:33 pm
Buy some large 100mm PP castors, plank of wood, screw a Really Useful
Box of 9L (short narrow oblong) 18W (large fat oblong) 19L (tall
narrow oblong), attach a vertical pole for manoeuvring, done. You may
want braked castors if on a slope.
You can buy something similar, with drawers, but the weight can become
a pain unless you have a sloped door threshold.
XML site map
>>> Have tried using the strongest cuboard magnet I can find (In north
>>> London u.k.), but if the wind picks up surprisingly it will just not
>>> hold. Also
>>
>> The magnet out of a hard drive is flat and very strong.
> Really? What kind of hard drive has a big flat magnet inside? That
> defies all logic on the principals of how a hard drive works.