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Simtel MSDOS 1992 June
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SIMTEL_0692.cdr
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msdos
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dskutl
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fixboot.arc
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FIXBOOT.MSG
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1987-12-15
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November 18, 1987 - Database Item #606
There has been an occasional problem with disks that have a non
compatible MS-DOS format. A disk or partition formatted with
compatible versions of MS-DOS will have a table called a BIOS PARAMETER
BLOCK (BPB) at offset Bh (11 decimal) of its first sector (boot sector).
The format in question locates its BPB at offset 3 of the first sector.
The BPB contains a field called a media byte which the system uses to
determine how a drive has been formatted and what type of disk it is.
Earlier MS-DOS versions could use an alternate method of determining
media type and could read this disk.
Current ZENITH MS-DOS versions -- 3.20 and 3.21 cannot read such
disks Any attempt to do so will disable the floppy drive until the
system is rebooted.
If you have a disk that you can read under some versions of MS-DOS but
not under MS-DOS 3.2 or MS-DOS 3.21, the following solutions are
suggested:
METHOD 1:
Format a disk with your ZENITH operating system and FORMAT utility.
Transport the problematic disk to the system that is able to read it
(or boot an MS-DOS version that is able to read it) and use the copy
command to copy desired files to the ZENITH formatted disk.
METHOD 2:
A program called FIXBOOT is available for download (DOWNLOAD SPECIAL
FILES section of the main bulletin board menu -- requires XMODEM
protocol). FIXBOOT is a utility designed to replace the boot sector on
a 9 sector/track, 40 track, double sided 360k diskette. It is useful
in situations where the target diskette's boot sector has been
damaged or erased, or in the above described situation.
FIXBOOT can be run from either a floppy drive or a hard disk. It is
invoked by typing "D:FIXBOOT <CR>", where 'D:' is an optional drive
letter specification.
FIXBOOT will prompt the user for the drive in which the target diskette
will be placed. It will then ask the user to ensure that the target
diskette is indeed in the target drive. Once the user has indicated
readiness by pressing a key, FIXBOOT will attempt to replace the boot
sector on the target diskette.
A message will be output to the console indicating whether or not the
boot sector replacement was successful and asking the user to press any
key to exit the utility.