2 GB Storage

Whoa! Did I pinch a sensitive nerve?

I guess I did.

: Back in Troll Mode, folk bart? So am I.
:
: "Folkert Rienstra" <see.re @freeler.nl> wrote in message
: : |
: | "Eric Gisin" <e @netidea.com> wrote in message
: : | : I don't doubt your experience, but I one big question.
: |
: | So Eric, you still don't doubt his experience?
: | It's not that he wasn't here and therefor unaware of your question.
: |
: | :
: | : How to the lift the heads in a 3.5" drive? I know how it was done in
: ancient
: | : large oxide drives, but there is so little room in modern drives to add
: such
: | : mechanics.
: | :
: | : If the heads lift on spindown, how can they stick? I assume there must
: be
: | : design or firmware bug that fails to move heads to the landing
: (takeoff?)
: | : zone.
: | :
: | : "dan" <danyelgood @my-deja.com> wrote in message
: | : : | : !Folkert, your true colours are exposed once again, buy a bridge, sit
: | : underneath it and jump out and charge people when they want to cross :O)
: | : Some drives do not Identify if they do not pass POST tests, some drives
: will
: | : only identify part of there model number (this is because they cannot
: read
: | : media capacity ), I will check next week and post my results if you wish
: | : Folberk!
: | : |
: | : | IBM 75 GXP use unload load technology.
: | : |
: | : | Load/unload (L/UL) technology eliminates contact start/stop stiction
: | : | and not stiction, which can happen when the drive is spinning down or
: | : | if power is cut.  The L/UL type drives do not have textured areas on
: | : | the disk, as there is no landing of the heads on the media, this can
: | : | make a lovely smooth surface for stiction. Due to the fact that the
: | : | heads do not land on the surface a much thinner layer of monolayer
: | : | (and sub-monolayer) films of perfluoropolyether (PFPE) liquid polymer
: | : | lubricants can be used, this coupled with high temperatures in the HDA
: | : | can evaporate, contamination like water (Humidity) and oxygen can have
: | : | a bad effect on the carbon layer (bonded to the lubricant which causes
: | : | irregularities on the media) (Hungary plant may have a problem. Who
: | : | knows?), and can again cause stiction. Also as the fly height reduces,
: | : | the amount of current (And switching speed) that is channeled through
: | : | the GMR (Etc???) head increases, which heats and slightly vibrates the
: | : | heads/media (Can crack the heads), another reason for
: | : | headcrash/stiction!  So if you take into account all of the above
: | : | tribology implications and information you can make your own decision.
: | : | A hot HDA,  coupled with decreased fly-height and a smooth surface is
: | : | a perfect environment for stiction (Suction of the two surfaces
: | : | together, very much like two panes of gl

Nothing to add, dream boy :O)

Back in Troll Mode, folk bart? So am I.

|
| "Eric Gisin" <e @netidea.com> wrote in message
| : I don't doubt your experience, but I one big question.
|
| So Eric, you still don't doubt his experience?
| It's not that he wasn't here and therefor unaware of your question.
|
| :
| : How to the lift the heads in a 3.5" drive? I know how it was done in
ancient
| : large oxide drives, but there is so little room in modern drives to add
such
| : mechanics.
| :
| : If the heads lift on spindown, how can they stick? I assume there must
be
| : design or firmware bug that fails to move heads to the landing
(takeoff?)
| : zone.
| :
| : "dan" <danyelgood @my-deja.com> wrote in message
| : | : !Folkert, your true colours are exposed once again, buy a bridge, sit
| : underneath it and jump out and charge people when they want to cross :O)
| : Some drives do not Identify if they do not pass POST tests, some drives
will
| : only identify part of there model number (this is because they cannot
read
| : media capacity ), I will check next week and post my results if you wish
| : Folberk!
| : |
| : | IBM 75 GXP use unload load technology.
| : |
| : | Load/unload (L/UL) technology eliminates contact start/stop stiction
| : | and not stiction, which can happen when the drive is spinning down or
| : | if power is cut.  The L/UL type drives do not have textured areas on
| : | the disk, as there is no landing of the heads on the media, this can
| : | make a lovely smooth surface for stiction. Due to the fact that the
| : | heads do not land on the surface a much thinner layer of monolayer
| : | (and sub-monolayer) films of perfluoropolyether (PFPE) liquid polymer
| : | lubricants can be used, this coupled with high temperatures in the HDA
| : | can evaporate, contamination like water (Humidity) and oxygen can have
| : | a bad effect on the carbon layer (bonded to the lubricant which causes
| : | irregularities on the media) (Hungary plant may have a problem. Who
| : | knows?), and can again cause stiction. Also as the fly height reduces,
| : | the amount of current (And switching speed) that is channeled through
| : | the GMR (Etc???) head increases, which heats and slightly vibrates the
| : | heads/media (Can crack the heads), another reason for
| : | headcrash/stiction!  So if you take into account all of the above
| : | tribology implications and information you can make your own decision.
| : | A hot HDA,  coupled with decreased fly-height and a smooth surface is
| : | a perfect environment for stiction (Suction of the two surfaces
| : | together, very much like two panes of glass pushed together) You can
| : | identify stiction by faint square marks on the media, normally only in
| : | one place on each surface, the marks are caused by the sliders that
| : | the heads are integrated into. Hope this in

: I don't doubt your experience, but I one big question.

So Eric, you still don't doubt his experience?
It's not that he wasn't here and therefor unaware of your question.

:
: How to the lift the heads in a 3.5" drive? I know how it was done in ancient
: large oxide drives, but there is so little room in modern drives to add such
: mechanics.
:
: If the heads lift on spindown, how can they stick? I assume there must be
: design or firmware bug that fails to move heads to the landing (takeoff?)
: zone.
:
: : !Folkert, your true colours are exposed once again, buy a bridge, sit
: underneath it and jump out and charge people when they want to cross :O)
: Some drives do not Identify if they do not pass POST tests, some drives will
: only identify part of there model number (this is because they cannot read
: media capacity ), I will check next week and post my results if you wish
: Folberk!
: |
: | IBM 75 GXP use unload load technology.
: |
: | Load/unload (L/UL) technology eliminates contact start/stop stiction
: | and not stiction, which can happen when the drive is spinning down or
: | if power is cut.  The L/UL type drives do not have textured areas on
: | the disk, as there is no landing of the heads on the media, this can
: | make a lovely smooth surface for stiction. Due to the fact that the
: | heads do not land on the surface a much thinner layer of monolayer
: | (and sub-monolayer) films of perfluoropolyether (PFPE) liquid polymer
: | lubricants can be used, this coupled with high temperatures in the HDA
: | can evaporate, contamination like water (Humidity) and oxygen can have
: | a bad effect on the carbon layer (bonded to the lubricant which causes
: | irregularities on the media) (Hungary plant may have a problem. Who
: | knows?), and can again cause stiction. Also as the fly height reduces,
: | the amount of current (And switching speed) that is channeled through
: | the GMR (Etc???) head increases, which heats and slightly vibrates the
: | heads/media (Can crack the heads), another reason for
: | headcrash/stiction!  So if you take into account all of the above
: | tribology implications and information you can make your own decision.
: | A hot HDA,  coupled with decreased fly-height and a smooth surface is
: | a perfect environment for stiction (Suction of the two surfaces
: | together, very much like two panes of glass pushed together) You can
: | identify stiction by faint square marks on the media, normally only in
: | one place on each surface, the marks are caused by the sliders that
: | the heads are integrated into. Hope this info helps. Obviously Folberk
: | and Robot Ron know all this, so have learnt nothing :O)!!!!!!! I will
: | post a picture of the 75GXP when I have one with stiction, quite soon
: | I think!! :Op
: |
:
:

In article <9jko9502 @enews3.newsguy.com>, Eric Gisin
<e @netidea.com> writes

When drives are powered down, the heads return to a parking position, so
that they land on a non-data area of the disk.  I haven't looked inside
a 75GXP (mine are still working) but I imagine the head lifting
mechanism is a simple wedge which lifts the arms slightly as they return
to the parking position.

If you look inside a dead Zip drive, you'll see a similar mechamism
using a plastic wedge to separate the heads as they return to the
retracted position.

--
"Security-wise, NT is a server with a 'Kick me' sign taped to it."
                      - Peter Gutmann

: I don't doubt your experience, but I have one big question.
:
: How to lift the heads in a 3.5" drive? I know how it was done in ancient
: large oxide drives, but there is so little room in modern drives to add
: such mechanics.

Ever seen a 3.5 inch SYQUEST drive, Eric? Ever wondered how you
can remove the cartridge without tearing the heads out?
A sloped carriage (a ramp, like the topend of a thick knitting needle,
split through the center) moves in over the platter and the headarm
assembly is drawn onto it so the heads are spaced out while being
retracted towards the rim, then the ramp moves out of the way
again, taking the headarm assembly with it.
Remember, these are 3.5 inch drives, the same size as regular harddrives.
The ramp has to move away to get the heads out of the way when the
cartridge is lifted. In a fixed harddrive that is not necessary.
If it can be done in a removable cartridge drive, it sure can be done in
a fixed disk drive. There are 2-3 empty corners in there.

:
: If the heads lift on spindown, how can they stick? I assume there must be
: design or firmware bug that fails to move heads to the landing (takeoff?)
: zone.

Which would qualify as a crash.
The normal case of stiction concerns drives that are unable to spinup
after a perfectly normal spin-down with the heads at the landingzone.
Heads landed in a different place than where they were supposed to be,
at spindown (or spinup for whatever reason), does not qualify as stiction
in the normal sense.
They are there because of either malfunction or maltreatment.

:
: : !Folkert, your true colours are exposed once again, buy a bridge, sit
: underneath it and jump out and charge people when they want to cross :O)
: Some drives do not Identify if they do not pass POST tests, some drives will
: only identify part of there model number (this is because they cannot read
: media capacity ), I will check next week and post my results if you wish
: Folberk!
: |
: | IBM 75 GXP use unload load technology.
: |
: | Load/unload (L/UL) technology eliminates contact start/stop stiction
: | and not stiction, which can happen when the drive is spinning down or
: | if power is cut.  The L/UL type drives do not have textured areas on
: | the disk, as there is no landing of the heads on the media, this can
: | make a lovely smooth surface for stiction. Due to the fact that the
: | heads do not land on the surface a much thinner layer of monolayer
: | (and sub-monolayer) films of perfluoropolyether (PFPE) liquid polymer
: | lubricants can be used, this coupled with high temperatures in the HDA
: | can evaporate, contamination like water (Humidity) and oxygen can have
: | a bad effect on the carbon layer (bonded to the lubricant which causes
: | irregularities on the media) (Hungary plant may have a problem. Who
: | knows?), and can again cause

Try the Castlewood ORB drive http://www.castlewood.com  This is a 2.2 GB
(FAT 32) removable HD.  Their latest version is 5.7 GB.  I have hear the
problems some people have had with this drive but I have backed up date
numerous time with it with no problems whatsover.  The EIDE version fit a
standard 3.5 inch drive opening.  You just have to realize that if you are
going to restore data from DOS to format the drive foe FAT 16 about 1.9 GB.
uncompressed.  You can compress it using ORB tools for about double the
capacity. The compressed files are standard zip files and can be
uncompressed with pkunzip.

I don't doubt your experience, but I one big question.

How to the lift the heads in a 3.5" drive? I know how it was done in ancient
large oxide drives, but there is so little room in modern drives to add such
mechanics.

If the heads lift on spindown, how can they stick? I assume there must be
design or firmware bug that fails to move heads to the landing (takeoff?)
zone.

!Folkert, your true colours are exposed once again, buy a bridge, sit
underneath it and jump out and charge people when they want to cross :O)
Some drives do not Identify if they do not pass POST tests, some drives will
only identify part of there model number (this is because they cannot read
media capacity ), I will check next week and post my results if you wish
Folberk!
|
| IBM 75 GXP use unload load technology.
|
| Load/unload (L/UL) technology eliminates contact start/stop stiction
| and not stiction, which can happen when the drive is spinning down or
| if power is cut.  The L/UL type drives do not have textured areas on
| the disk, as there is no landing of the heads on the media, this can
| make a lovely smooth surface for stiction. Due to the fact that the
| heads do not land on the surface a much thinner layer of monolayer
| (and sub-monolayer) films of perfluoropolyether (PFPE) liquid polymer
| lubricants can be used, this coupled with high temperatures in the HDA
| can evaporate, contamination like water (Humidity) and oxygen can have
| a bad effect on the carbon layer (bonded to the lubricant which causes
| irregularities on the media) (Hungary plant may have a problem. Who
| knows?), and can again cause stiction. Also as the fly height reduces,
| the amount of current (And switching speed) that is channeled through
| the GMR (Etc???) head increases, which heats and slightly vibrates the
| heads/media (Can crack the heads), another reason for
| headcrash/stiction!  So if you take into account all of the above
| tribology implications and information you can make your own decision.
| A hot HDA,  coupled with decreased fly-height and a smooth surface is
| a perfect environment for stiction (Suction of the two surfaces
| together, very much like two panes of glass pushed together) You can
| identify stiction by faint square marks on the media, normally only in
| one place on each surface, the marks are caused by the sliders that
| the heads are integrated into. Hope this info helps. Obviously Folberk
| and Robot Ron know all this, so have learnt nothing :O)!!!!!!! I will
| post a picture of the 75GXP when I have one with stiction, quite soon
| I think!! :Op
|

Try the Castlewood ORB http://www.castlewood.com . This is a removable 2.2
GB HD (FAT 32).  Their latest version has 5.7GB capacity.  I have heard the
problems that some people complain about with this drive but I have backed
up data numerous times with this drive with no problems whatsoever.  The
disks are reliable and the EIDE version fits a 3.5 inch drive bay. You just
have to realize that if you are going to restore data from DOS to save your
data in the FAT 16 format, about 1.9 GB uncompressed. You can double this
with compression which is supported by ORB Tools.  The compressed files are
standard zip files and can be uncompressed with pkunzip.

IBM 75 GXP use unload load technology.

Load/unload (L/UL) technology eliminates contact start/stop stiction
and not stiction, which can happen when the drive is spinning down or
if power is cut.  The L/UL type drives do not have textured areas on
the disk, as there is no landing of the heads on the media, this can
make a lovely smooth surface for stiction. Due to the fact that the
heads do not land on the surface a much thinner layer of monolayer
(and sub-monolayer) films of perfluoropolyether (PFPE) liquid polymer
lubricants can be used, this coupled with high temperatures in the HDA
can evaporate, contamination like water (Humidity) and oxygen can have
a bad effect on the carbon layer (bonded to the lubricant which causes
irregularities on the media) (Hungary plant may have a problem. Who
knows?), and can again cause stiction. Also as the fly height reduces,
the amount of current (And switching speed) that is channeled through
the GMR (Etc???) head increases, which heats and slightly vibrates the
heads/media (Can crack the heads), another reason for
headcrash/stiction!  So if you take into account all of the above
tribology implications and information you can make your own decision.
A hot HDA,  coupled with decreased fly-height and a smooth surface is
a perfect environment for stiction (Suction of the two surfaces
together, very much like two panes of glass pushed together) You can
identify stiction by faint square marks on the media, normally only in
one place on each surface, the marks are caused by the sliders that
the heads are integrated into. Hope this info helps. Obviously Folberk
and Robot Ron know all this, so have learnt nothing :O)!!!!!!! I will
post a picture of the 75GXP when I have one with stiction, quite soon
I think!! :Op

Dan

Folberk/R Ron how many drives have you repaired? Recovered data
from????, how many times have you replaced
heads/spindles/platters?????

< >...

underneath it and jump out and charge people when they want to cross :O)
Some drives do not Identify if they do not pass POST tests, some drives will
only identify part of there model number (this is because they cannot read
media capacity ), I will check next week and post my results if you wish
Folberk!

Wrong,  there's only "contact start/stop stiction"...quit makin things up.

Which is entirely not relevant since the heads are lifted.

Clueless double talk and nonsense.

More clueless gibber and the rest is snipped.