>> And dust particles will work like sandpaper and grind the
>> disk surface
> Which is why the inside of the disk jacket has material to sweep up
> dust and keep it from the disk surface.
Sometimes this works.
> Geez, people, I never claimed that you could dump huge piles of dust, smoke,
> dirt, and sand on the floppy disk and expect it to work for more than five
> seconds. My point was that you don't have to be super-careful with them. One
> dust particle isn't going to ruin the disk (at least not very quickly). You
> don't have to handle floppy media in a cleanroom. However, one dust or smoke
> particle *IS* enough to cause a head crash in a Winchester drive.
I have even seen SyJet drives working within a heavy
smokers environment - a friend of mine - he has ashes
all around the desk, the keyboard and everywhere else.
And the dam things are working prety good.
> > there are 4 basic technologies for the head/surface
> > management of disk Magnetic:
> >
> > 1. Fixed head over hard surface
> > 2. Flying head over fixed surface (Winchester)
> > 3. Fixed head over flexible surface (Bernulli)
> > 4. Head grinding over flexible surface (Floppy)
> > (also tapes go into #4 but since the head surface
> > speed is only slow, the effekt is less visible)
> Depends on the kind of tape. Helical scan tape has this effect
> *MORE* than floppy drives, because the head-to-tape speed is much
> higher.
:))) to modern in data processing - I'll ignore them.
Any tape with more than 1600 dpi isn't a tape to me :)
>> And we are talking about 2 vs. 4 (head flying over hard
>> surface vs. head on flexible surface). The other ones
>> have been used in several drive types thru the past. And
>> all in encapsulated (seled) and 'free' environment.
> That's my point. The Syquest SyJet and Sparq drives, and the Iomgea
> Jaz drive, appear to use what you have listed as configuration 2.
> They have to, in order to get .75 to 1.0G density per platter.
> Configuration 1 can't get the head close enough to the media. And even
> if they did use configuration 1 and get the head close enough to the
> media, then it would be just as susceptible to foreign particles as
> configuration 2.
They used #2 in the SyJet, since the problems are much
bigger with #1. My experiance with any kind of high
density media is that the process of insert and remove
has to be done in a aprobiate manner. Like back in my
operator times, the insertation of a Disk has just to
be done carefuly and sensitive. And this is still true
for any other modern removable media.
> That's precisely why they are so f*&#ing unreliable.
I just cant agree - I have several running without any
problem. As I mentioned earler, I have almost any drive
ever build from Syquest (and some other manufacturers),
and I'm prety satisfied with Syquests.
The only thin I learned to hate are MO drives. Once I
had a 640 MB Sony drive, and it died 5 times and had to
be replaced 5 times ... Later on I went back to pure
magnetics.
> Out of over 30 SyJet and Sparq drives, I don't think we've had a single
> one last more than 100 cartridge insert/eject cycles.
I son't know whats wrong, but I may just have had luck.
Servus
Hasn
--
Ich denke, also bin ich, also gut
HRK
Received on Fri Nov 13 1998 - 14:28:05 GMT