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-
- The ST's operating system caches disk information. It
- detects floppy disk changes by watching the write protect line. If
- it hasn't detected a floppy disk being removed, it will use the
- directory information in RAM. Some computers have faulty write
- protect lines, and do not detect when a disk is removed. This is
- quite dangerous, as your disks may become corrupted if you read
- from a disk, replace it with a different one, and write to that
- disk drive. [On a one drive system you can get around this problem
- by constantly swapping between calling drive A: A: and B: which
- forces GEMDOS to update the disk cache, but that is a nuisance.]
-
- You can tell if your ST has this problem by opening a
- DeskTop window, replacing the disk with a different one, and
- pressing Escape. The window should be updated with the contents of
- the new disk. [I am not sure what causes this problem, but I have
- heard that it is somewhat common among new Megas. I wrote this
- program for my (cheap!) nextdoor neighbor, whose 2 year old(?)
- 520STFM recently developed this problem.]
-
- Anyway, this program will "Force a Media Change", meaning,
- in essence, that the ST will always read from a disk before
- writing to it. The program will take up around 1K of RAM, and may
- be placed in an AUTO folder. If you want to use this program as a
- (temporary?) solution, be sure to ALWAYS run it before doing any
- disk I/O.
-
- I hope this program helps somebody out there (besides my
- nextdoor neighbor!), and if anybody knows the solution to the
- problem (besides replacing the drive), please let me know. My
- address is
-
- Larry McConnell
- 97 North Road
- Bedford, MA 01730
-
- and my Genie addresss is L.McConnell. [Please send all donations
- (hahaha hohohoho) to my street address. :-]
-
-