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1994-10-20
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iHPFS
An Installable
HPFS Driver for DOS
Copyright (c) 1993-94, Marcus Better
Version 1.15
October 20, 1994
Overview
The OS/2 operating system introduces a new file system, the
High Performance File System (HPFS). HPFS has many advantages
over the FAT system that DOS uses. However, it is usually
impossible to access files on an HPFS partition without booting
OS/2.
iHPFS makes it possible for OS/2 users to reach files and
directories on their HPFS partitions when they boot plain DOS.
The HPFS partition is assigned a drive letter, and can be
accessed like any DOS drive - although the current version of
iHPFS is restricted to read-only access.
iHPFS is easy to install and convenient to use, as it acts like
any DOS drive. Files and programs on the HPFS partition may be
read and executed, or copied to another drive.
Disclaimer and License Agreement
iHPFS is supplied as is. The author disclaims all warranties,
expressed or implied, including, without limitation, the
warranties of merchantability and of fitness for any purpose.
The author assumes no liability for damages, direct or
consequential, which may result from the use of iHPFS.
You may copy iHPFS on the following conditions: iHPFS must be
copied in unmodified form, and this documentation, also
unmodified, must be included in the copy.
You may give iHPFS to your friends or post it for downloading
on bulletin boards only as long as the above conditions are
met.
System requirements
In order to run iHPFS, you need
- a 386 processor or better
- a computer running IBM or MS DOS 4 or later
NOTE: iHPFS won't work under DR-DOS and other clones.
It is also nice if you have an HPFS partition, otherwise all
you'll get from iHPFS is an error message.
How to use iHPFS
Run IHPFS.EXE from the DOS prompt. The syntax is:
IHPFS [d:][n] [/C=x] [/L] [/U]
The brackets indicate an optional parameter.
d: The drive letter that you want to assign to iHPFS.
If this parameter is omitted, iHPFS will find the
first available drive letter.
n The number of the HPFS partition (1-9) that you want
to access. If this parameter is omitted, iHPFS will
assume the first HPFS partition in the system.
HPFS partitions are numbered (logically) so that
you can specify to iHPFS which partition you want to
access. The first HPFS partition on the first hard
disk is partition number 1. Note that only HPFS
partitions are counted - if your system has two HPFS
partitions, they will have numbers 1 and 2, regard-
less of any other non-HPFS partitions you might have.
/C=x This option tells iHPFS to set up a cache in XMS
memory. A cache can improve performance dramatically.
x specifies the cache size, in KB, and is not
optional. To use this option, you must have an XMS
driver like HIMEM.SYS loaded.
/L This option makes it possible to access files with
long filenames. These files will be given a new
filename and extension. The name of the file will
consist of the first valid charactes (eight or less)
before the first dot in the long filename. The
extension is computed from the long filename, and is
made up of letters, digits and a few other
characters. Files that begin with a dot will be given
the name HPFS.xxx, where xxx is the computed
extension.
/U The /U option will uninstall an iHPFS drive. When
this option is used, a drive letter must also be
specified. Running iHPFS with the /U option removes
the specified drive, and unloads most of the
driver from memory. A few hundred bytes will still
remain in memory, though.
iHPFS will display the message
Installed as d:
if the installation was successful.
Contacting the author
You are welcome send me any ideas, comments and suggestions for
iHPFS. If you have found any bugs, please let me know. I can be
reached at the following addresses:
Fidonet: 2:201/2120.1
Internet: Marcus_Better@p1.f2120.n201.z2.fidonet.org