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#21
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Why are HDD platters harder than the floppy/ZIP discs?
"Rod Speed" wrote:
Whatever you like to call it. It has nothing to do with head calibration, it's the zone of the disk under the ramp where the heads approach the disk and establish a stable flying height. Wrong. There was no ramp initially, that came later to avoid stiction which happens due to the very smooth platter and head No, it was the glue (used to keep the magnetic media on the aluminum platters), would get sticky when hot, when the heads parked themselves, the glue would cool down and the heads would become stuck. Mostly a Seagate problem. and the heads never ever deliberately contact the platter anymore, because the heads dont get anywhere hear the platter from the ramp until the platters are up to rotation speed and so the last thing you want is a head crash. They certainly dont ever deliberately 'the head hits the disk in order to find it'. You should take the cover off a hard drive and watch how the heads operate, you turn off the HD the heads move very quickly to the inner sector, where they sit, as the heads need air to float or lift themselves up - can't remember the effect that causes this - but it was used on those old 8" floppies (in plastic cases). The floppies would sag at the outside edge, and this effect would bring the edges up and the floppy even. (No, not centrifugal force) I've never seen a ramp, when I take a HD apart it's always the same the heads are as close to the spindle as they can get, and all the heads are sitting on the platters. -- Amazing Street Basketball Tricks http://www.youtube.com/v/fYlTrl6Cwwc |
#23
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Why are HDD platters harder than the floppy/ZIP discs?
"Rod Speed" wrote:
Wrong. There was no ramp initially, that came later to avoid stiction which happens due to the very smooth platter and head No, it was the glue (used to keep the magnetic media on the aluminum platters), would get sticky when hot, when the heads parked themselves, the glue would cool down and the heads would become stuck. Utterly mangled all over again. There was never any 'glue (used to keep the magnetic media on the aluminum platters) I had read and been informed that it was the glue, apparently it was due to "lubricants used to coat the platters" http://en.wikipedia.org/wiki/Stiction#Hard_disk_drives And you are right about the Ramps they are addressed in the link as well - I do need to open up a new HD, but don't have a bad one; lot's of old drives, less than 2gigs mostly -- Amazing Street Basketball Tricks http://www.youtube.com/v/fYlTrl6Cwwc |
#24
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Why are HDD platters harder than the floppy/ZIP discs?
wrote
Rod Speed wrote wrote Rod Speed wrote Wrong. There was no ramp initially, that came later to avoid stiction which happens due to the very smooth platter and head No, it was the glue (used to keep the magnetic media on the aluminum platters), would get sticky when hot, when the heads parked themselves, the glue would cool down and the heads would become stuck. Utterly mangled all over again. There was never any 'glue (used to keep the magnetic media on the aluminum platters) I had read and been informed that it was the glue, And you're so stupid that you cant work out what is mindless silly **** and what isnt. apparently it was due to "lubricants used to coat the platters" http://en.wikipedia.org/wiki/Stiction#Hard_disk_drives Yep, for when the heads did land on the platters. They dont anymore. And you are right about the Ramps they are addressed in the link as well - I do need to open up a new HD, but don't have a bad one; lot's of old drives, less than 2gigs mostly Yeah, tho the newest of those may well have the ramps. No point tho, wikepedia is right on that and you can find plenty of documentation on them from the hard drive manufacturers too like http://www.hitachigst.com/tech/techlib.nsf/techdocs/9076679E3EE4003E86256FAB005825FB/$file/LoadUnload_white_paper_FINAL.pdf |
#25
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Why are HDD platters harder than the floppy/ZIP discs?
wrote in message
... Here's something I found of interest (same link): "The platters of a common hard drive are not completely sealed off from the outside as many people think. Therefore, you can damage an HDD by running it at too high of an altitude where there is less air pressure; since the heads may stay in contact with the platters or skip up and down!" (the same force is involved or lacking due to air pressure) Most drives have a warning on drive - like he http://www.sg2buy.com/productpic/hdd251.jpg look lower left corner - to the right of the circle is a warning - "do not block breather hole" |
#26
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Why are HDD platters harder than the floppy/ZIP discs?
"Rod Speed" wrote:
I had read and been informed that it was the glue, And you cant work out what is mindless silly **** and what isnt. Nope, it was the answer for years on stiction, I am one of many who accepted that. -- Amazing Street Basketball Tricks http://www.youtube.com/v/fYlTrl6Cwwc |
#27
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Why are HDD platters harder than the floppy/ZIP discs?
wrote
Rod Speed wrote wrote Rod Speed wrote wrote Rod Speed wrote Wrong. There was no ramp initially, that came later to avoid stiction which happens due to the very smooth platter and head No, it was the glue (used to keep the magnetic media on the aluminum platters), would get sticky when hot, when the heads parked themselves, the glue would cool down and the heads would become stuck. Utterly mangled all over again. There was never any 'glue (used to keep the magnetic media on the aluminum platters) I had read and been informed that it was the glue, And you're so stupid that you cant work out what is mindless silly **** and what isnt. Nope, Yep. it was the answer for years on stiction, And you are so stupid that you didnt even notice that hard drive platters dont have the magnetic material glued to the platters at all. I am one of many who accepted that. Because you dont have a clue about how platters in hard drives are actually done. |
#28
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Why are HDD platters harder than the floppy/ZIP discs?
"Rod Speed" wrote:
you didnt even notice that hard drive platters dont have the magnetic material glued to the platters at all. The heads use lead to write to the platters? Your kind of a jerk and I'm done with your replies I have followed your post and did have a bit of respect for you, but man that's gone. I noticed your one of those to stupid to use a spell checker. Take the last word, I won't be seeing it. -- Amazing Street Basketball Tricks http://www.youtube.com/v/fYlTrl6Cwwc |
#29
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Why are HDD platters harder than the floppy/ZIP discs?
wrote
Rod Speed wrote you didnt even notice that hard drive platters dont have the magnetic material glued to the platters at all. The heads use lead to write to the platters? The magnetic material isnt glued to the substrate, ****wit. Its vaccuum deposited onto the substrate instead. http://en.wikipedia.org/wiki/Hard_disk_platter reams of your puerile **** flushed where it belongs Take the last word, I won't be seeing it. Only in your pathetic little drug crazed pig ignorant fantasyland, ****wit child. |
#30
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Why are HDD platters harder than the floppy/ZIP discs?
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