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TURBOBUG.TXT
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2006-10-19
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ORIGINALLY PUBLISHED IN LIMA NEWSLETTER MARCH 1989
^A BUG IN THE "INITIALIZE DISK" OPTION OF TURBO COPY
^^^^^^^^^^^^^^^^reported by Charles Good
When you initialize a blank disk for the first time by
selecting item 3 (Initialize Disk) of the TURBO COPY menu,
the resulting disk will have >00 entered at bytes >12 and
>13 of sector zero. Byte 12 is where the number of sides is
indicated and should read >01 or >02 instead of >00. Byte
13 is where density information is written, and should read
>01, >02, or >04.
If you use TURBO COPY to initialize a blank disk DSSD
and then later try to copy this disk using the COPY DISK
options of either DM1000 or Birdwell's Disk Utilities,
problems occur. The >00's at bytes >12 and >13 of sector
zero will confuse DM1000 or Birdwell's DSKU into thinking
that the source disk is SSSD rather than DSSD. If you are
using a blank target disk, the copying software will then
automatically initialize the target disk as SSSD instead of
DSSD.
Problems with TURBO COPY only show themselves in the
above described specific circumstances, and only of the
TURBO initialized disk is in a format other than SSSD. In
all other respects a disk initialized or copied with TURBO
COPY behaves perfectly normally. I like TURBO's speed and
error checking, and I intend to continue to use TURBO COPY
for fast disk copying and initialization. With so many fast
disk copy programs available, there is little reason to use
DM1000 or DSKU for whole disk copying.
If you run into this problem and have trouble copying a
TURBO initialized disk with DM1000 or DSKU, you can fix the
source disk with a sector editor. For a DSSD source disk,
entering >0201 starting at byte >12 of sector zero will do
the trick.
.PL 1