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EFDISK.DOC
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1996-05-08
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╔═════════════════════════════════╗
║ EFDISK v1.3 DOCUMENTATION ║
║ (C) Nagy Dániel 05-08-96 ║
╚═════════════════════════════════╝
┌──────────┐
│ CONTENTS │
└──────────┘
Disclaimer............................ 1
Copyright............................. 2
Introduction.......................... 3
Features.............................. 4
Requirements.......................... 5
Usage (IMPORTANT!).................... 6
History............................... 7
Technical information................. 8
Contact............................... 9
┌────────────┐
│ DISCLAIMER ├──────────────────────── 1 ─────────────────────────────────────
└────────────┘
Using this program comes without any warranty. The author
and distributors will not accept responsibility for any
damage incurred directly or indirectly through use of this
program.
Use at your own risk!
┌───────────┐
│ COPYRIGHT ├───────────────────────── 2 ─────────────────────────────────────
└───────────┘
This program is copyright (c) Nagy Dániel.
This program is a part of the MasterBooter package. Distributing it
separately is not allowed. Distribute the whole unmodified shareware
package only!
For other distributing information see the MasterBooter
documentation.
┌──────────────┐
│ INTRODUCTION ├────────────────────── 3 ─────────────────────────────────────
└──────────────┘
EFDISK (Extended FDISK) is a disk partitioning program. With EFDISK
you can create or modify primary partitions of your harddisks.
EFDISK supports many partition types, howewer you cannot make
DOS logical drives and extended partitions with it. The original
FDISK program doesn't allow you to create more than 1 primary
partition. EFDISK does.
Doing so EFDISK is a powerful tool to help installing multiple
operating systems in your PC.
EFDISK is a support program of MasterBooter.
┌──────────┐
│ FEATURES ├────────────────────────── 4 ─────────────────────────────────────
└──────────┘
- Displaying partition information of all IDE drives in your system
- Creating or editing partitions
- Compatibility with all partition types, including:
FAT (DOS, Windows, Win95, OS/2)
HPFS (OS/2)
Minix (Linux)
Ext2FS (Linux)
Linux swap (Linux)
NTFS (Windows NT)
- Easy-to-use user interface
┌──────────────┐
│ REQUIREMENTS ├────────────────────── 5 ─────────────────────────────────────
└──────────────┘
- 80286 processor or up
- MS-DOS or compatible operating system
- At least one harddisk
- Keyboard
- VGA adapter
┌───────┐
│ USAGE ├───────────────────────────── 6 ─────────────────────────────────────
└───────┘
Note: Playing with partitions is a risky job! Use this program only
if you know what you're doing!
1) Installation
You can copy these files (this docs and the executables) together
wherever you like. This program doesn't need any additional
settings. Just run it and have fun.
2) Usage information
For safety:
1) Make a system disk: Type: format a: (PRESS ENTER)
sys c: a: (PRESS ENTER)
2) Run the program MRESCUE.COM. Choose the 'Create rescue disk'
option. It will copy important information about your disks
and the MRESCUE.COM itself to floppy, so you can restore your
previous configuration later if necessary.
3) Now you can safely run EFDISK. If anything goes wrong, boot
from the floppy you've just created, run MRESCUE.COM and
choose 'Restore original configuration'.
This will reset all modifications.
Send me a mail if something is not working, and write
all steps you've done unless I won't be able to correct the
problem. Thank You!
Before running EFDISK quit all multitasking environments
(ie. Windows or OS/2 DOS box) and run plain DOS, because
after the program writes the modifications to your harddisk,
the system needs to be rebooted.
When executing, EFDISK will gather information about your disks and
partitions. Then you will be provided a list of all partitions of
all disks and their parameters. From this list you can choose the
partition entry you want to change.
When you select a partition, EFDISK will ask several questions.
These are:
- The hexadecimal type ID of the partition. EFDISK will show you
the most common types and their IDs.
- Starting cylinder number of partition (the minimum is 0).
If the previous partition is ending on cylinder 'x' then set
this to 'x+1'. This number is decimal.
- Ending cylinder number of partition. EFDISK will show you the
maximum cylinder number available for the actual harddisk.
- Bootability. You can set a partition active or not.
The number of heads and sectors per track vaules are determined
automatically for each disk, you don't have to mess with them.
After preparing all partition entries, press F10 to save the new
partition table to disk.
Reboot the computer, format the partitions, install the operating
systems, install MasterBooter and have fun!
!! Usage note: - EFDISK doesn't check for partition errors! It's not an
!! 'intelligent' program. You have total freedom to set all
!! parameters, even if they are incorrect or redundant!
!! - This version can be used with max. two hard drives only!
3) Notes about partitioning
- If there's data on your harddisk then create a backup of your
system with MRESCUE.
- You can have only one active partition in your first harddisk's
partition table.
- Don't use EFDISK to resize existing partitions with data in them,
because EFDISK doesn't patch the parameters in the boot sectors,
only the partition tables.
┌─────────┐
│ HISTORY ├─────────────────────────── 7 ─────────────────────────────────────
└─────────┘
Version:
1.1 - First official release in the MasterBooter package
1.2 - If the starting cylinder of a partition was 0, then the
'relative starting sector' and 'number of sectors' value
in the partition table were incorrect. Now they're correct.
1.3 - Fixed a small bug, that sometimes caused incorrect 'number
of sectors' value.
┌───────────────────────┐
│ TECHNICAL INFORMATION ├───────────── 8 ─────────────────────────────────────
└───────────────────────┘
A harddisk can contain up to four primary partitions. The partition
table (which resides in the very first sector of your harddisk)
describes the type, bootability and starting/ending cylinder number
of the partitions. In bootable partitions, the first sector is
always the so called 'boot sector' which contains a small OS loader.
In these partitions you can install any operating system in theory.
But in the real world some operating systems don't allow you to
create more than one primary partition, or to boot another operating
system. So creating multiple primary partitions and choosing the
operating system at boot time was quite difficult.
That's why I wrote EFDISK and MasterBooter.
Note: DOS based systems (therefore Windows 95) can only boot from
a primary partition of the first harddisk!
┌─────────┐
│ CONTACT ├─────────────────────────── 9 ─────────────────────────────────────
└─────────┘
If you have any problems, questions or suggestions you can
contact me through mail or Internet E-mail.
Bug reports, ideas also welcomed!
Postal address: Internet E-mail address:
────────────── ───────────────────────
Nagy Dániel nagyd@almos.vein.hu
2011 Budakalász
Ciklámen u. 19 at the University of Veszprém
HUNGARY
Tel/Fax/Modem: (36) 26 340-472