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- Recently I discovered what appeared to be an interesting solution
- to a shortage of cash in my pocket. In getting into the 3.5 inch
- floppy craze, wanting to make my clone system at the house
- capable reading data I created at the office on a 3.5 inch floppy
- drive, I purchased a 3.5 for the AT clone, 1.44 Meg version. As
- all of the disk with which I wished to work were formatted at
- 720K all was well until I tried to format a 3.5 at 720K at home.
- Strange errors from PC-Dos prompted me to change my setup rom?
- for the 3.5 to be a 720K drive. All diskettes formatted fine, or
- so it would seem. (By this time I was convinced that the computer
- store had stuck be with a 720K drive for the price of a 1.44M.
-
- In rationalizing that I had just been screwed, I contacted
- another company with witch I had been very pleased to associate,
- and ordered a real 1.44, 3.5 floppy. I also ordered for the first
- time a box of 2HD floppies for the drive. Before I got a chance
- to plug in the new drive, I discovered that all 3.5 inch floppies
- are not alike. See below:
-
-
- ┌─────────────────────────────┐ ┌─────────────────────────────┐
- │ ██│ │██ ██│
- │ │ │ │
- │ │ │ │
- │ │ │ │
- │ │ │ │
- │ │ │ │
- │ ┌─────────────────┐ │ │ ┌─────────────────┐ │
- │ │ ┌──┐ │ │ │ │ ┌──┐ │ │
- │ │ │ │ │ │ │ │ │ │ │ │
- │ │ └──┘ │ │ │ │ └──┘ │ │
- └────┴─────────────────┴──────┘ └────┴─────────────────┴──────┘
- Standard 2D2S 3.5 High Density 2HD 3.5
-
- Well the first thing I noticed is what appeared to be a permanent
- write protect hole on the right side of the disk as shown above.
- I quickly slipped one of these new media types into my drive with
- the CMOS configured as 1.44 - 3.5 with the old drive and wham
- bang it formatted the disk with no problems. I now have an extra
- 3.5 - 1.44 Meg drive. But the story doesn't end here.
-
- Logic told me that in the drive, some sort of sensor was testing
- the media to determine whether the diskette was either a
- conventional 2S2D or a 2HD. Always one to try things, a grabbed
- a box of my cheap-o-720K diskettes and ran to the garage were I
- have a drill press. Mounted a 1/4 inch bit in the press and
- started to punch holes in the upper right hand corner. I bought
- the box of diskettes at a department store at $9.45 for ten. All
- 10 formatted to 1.44M once the hole was punched in the corner.
- The cheapest I have found the 2HD box of 10 is $39.45 (Sony).
- Using this technique will give you almost 4 times the number of
- diskettes for the same price.
-
- I am interested if anyone else has tried this, by all means I
- think you should if you have a 1.44 Meg floppy drive. Write or
- call me below:
-
- Colegate V. Spinks
- 102 N. Washington St.
- San Angelo, Texas 76901
-
- (915)658-7747 Texas Thunder (RBBS,SYSOP)
-
-