HPFSRem -- HPFS removability software

                          Version 1.11

                 Documentation update (96/10/13)

              Copyright (c) 1996 by Jeff Jackowski

This software is free


    HPFSRem allows you to use HPFS on some removable drives

    without losing the ability to remove and replace disks.

    Although HPFS without any special software can sometimes be

    used on a removable drive without any problems, I found that

    often system crashes will be the result and data can be

    lost. HPFSRem is my attempt to eliminate data loss and

    system crashes from using HPFS formatted removable media.  I

    can't guarantee HPFSRem will let you use HPFS with any

    drive, but it works for me and several other people with

    varying drives. You should test your drive with HPFSRem to

    see if it works before using HPFS on removable disks on a

    large scale. Please email me at jackowskij@email.uah.edu to

    tell me what works and what doesn't. Also, visit the web sit

    at http://www.cs.uah.edu/cs/students/jjackows/hpfsrem. If its

    not there, search for it on Yahoo.


    And PLEASE be sure to send the output of HPFSRem with the

    "S" parameter and any error codes if you're having a



    support removable drives. HPFSRem attempts to circumvent

    this limitation and will work if my directions are followed

    and your removable drive cooperates. Any deviation from my

    instructions may cause various problems ranging from an

    inability to use HPFS on removable media to system crashes

    when a disk formatted with HPFS is removed or inserted.

    Also, any emails I get with questions that have answers in

    this text may not receive a response.

    NOTE TO EXPERTS: You may skip the "Disk setup" section, but

    should read the rest, paying close attention to the "FYI"

    and "Known problems and limitations" sections.

System Requirements

    OS/2 Warp (version 2.x may work, but I'm not sure)

    HPFS must be installed

    EMX 0.9a or later installed

    A removable drive (see "Compatible Drives" and "Drive

      Requirements" sections below)

    NOTE: Contrary to SyQuest documentation, partitioned

      removable disks can be used if OS/2 boots from a logical

      partition (so you can put OS/2 on drive D and DOS on drive

      C, for instance). The removable disks should be given a

      logical, not primary, partition to make this work.

Web Site


    Listed on Yahoo

    The site contains updated information on HPFSRem including:

       A list of compatible drives

       Instructions on making the drives work

       Links to device drivers

       The latest version of HPFSRem

    The web site is meant to be an addendum to this document,

      not a total replacement.

Compatible Drives

    The following drives have been tested by myself and other

      users. Other drives may work as well.

    Iomega Zip works with the OAD drivers and works. FLT drivers

      may also work. Follow the instructions included with the

      drivers to format the disks with HPFS, then use HPFSRem.

    Iomega Jaz has not been made to work, possibly because of

      SCSI controller problems.

    SCSI controller note: The Iomega drivers use a neat trick to

      allow the disks to be formatted with HPFS. Controllers

      other than the ones that Iomega sells may have to use

      different drivers, which means no HPFS.

    SyQuest's EZ135 and SQ3270 have been tested and work.

    SyQuest's EZFlyer and SyJET probably work because they use

      the same drivers as the EZ135.

    A PD drive manufactured by Matsushita Electronic for

      Panasonic and Toray (650MB PHASEWRITER DUAL). It may

      require SyQuest drivers to eject, along with its own


Drive Requirements

    SHORT: The drive should be non-removable (from OS/2's point

    of view) or removable and lockable. Plus, you'll need to

    format the disk with HPFS.

    LONG: To use HPFS with a given drive, you need to able able

    to format the disk with HPFS (consult documentation below

    and the documentation that came with the drive). This

    sometimes requires that you lock the disk in the drive. Use

    HPFSRem with the "I" parameter to lock the disk. Some drives

    will lock automatically. If the drive won't unlock, then the

    drive won't let you remove the disk.

Error messages (New info for v1.1)

    HPFSRem v1 would sometimes give error messages that did not

    stop it from doing its task. I think it mostly has to do

    with support for locking and unlocking the disk, which was

    required in v1 to run without errors. I have made v1.1 to

    better handle the lack of support for locking and unlocking,

    and to support removable drives that OS/2 sees as

    non-removable drives.

    In addition, HPFSRem v1.1 gives error code values that,

    while not always self-explanatory, should help me to figure

    out what's wrong.


    First, install EMX if you haven't already. You can find the

      file you need at ftp://hobbes.nmsu.edu or ftp://cdrom.com.

      The directory to look for is EMX???, where the ??? mark

      the version number, such as 09a and 09b. The file is

      EMXRT.ZIP. It contains installation instructions for


    Copy HPFSRem.exe to a directory in your path.


    The syntax of HPFSRem is:

       HPFSRem d [R | I | RI | S]

    d is the drive letter of the removable drive.

    R tells HPFSRem to prepare the disk for removal. If the disk

      is locked (drive won't allow the disk to be ejected), then

      HPFSRem will unlock it.

    I tells HPFSRem to allow the insertion of a disk. You will

      be prompted to insert a disk. The disk will be locked in

      the drive until the "R" parameter is given.

    RI, a combination of the separate "R" and "I" parameters,

      tells HPFSRem to prepare a disk for removal and then allow

      another disk to be inserted.

    S will make HPFSRem give you information about the drive you

      specify. This information includes whether OS/2 sees the

      drive a removable or not, if the drive is locked, can be

      locked, or won't tell, and HPFSRem's assessment of the

      possibility of using HPFS removability on the drive.

      PLEASE give me this information along with bug reports!

    Type "hpfsrem" and enter to receive a help screen.

Disk setup

    NOTE: The following procedure only works for removable

    drives that support partitions, like SyQuest drives.

    Although the below text says otherwise (I haven't revised

    it), HPFSRem can be used on drives that do not support

    partitions so long as its disks can be formatted with HPFS.

    Follow the instructions included with your drive to do this.

    Then you can use HPFSRem.

    To make use of this utility, you must format some of your

    removable disks with HPFS. To do this, you must first

    partition your disk using FDISK. You can run FDISK from the

    command line, or select "Create partition" from the menu of

    the Drives object.

    If you are preparing several disks, it is fastest to boot

    the system to the command line by pressing Alt-F1 before the

    OS/2 logo is displayed and then pressing "C" for the command

    line. This is because you will have to reboot every time you

    set up a partition. HPFSRem can be used to unlock the disk

    so that you can remove it without having to boot to the WPS.

    Once you're running FDISK, select the correct disk for your

    removable drive. FDISK starts with disk 1 (first physical

    disk) selected. Disk 1 is normally a hard drive -- you will

    probably need to select disk 2 or higher. If you can't find

    the removable drive on FDISK's drive list, then you can't

    use HPFSRem :(.

    Next, delete any existing partitions on the removable disk.

    Of course, you should backup any data that may be on the

    disk if you want to keep it. After that, create a partition

    on your removable disk that is the full size of the disk.

    The default partition size FDISK will present is the total

    remaning space on the disk. Make the partition an

    extended/logical partition. Then quit FDISK. A reboot is

    required by the system at this point.

    After rebooting, you will need to format the disk. Go to the

    menu of the removable drive in the Drives folder and select

    format. Tell the format program to use HPFS. Or, you can use

    the format command from the command line with the "/fs:hpfs"



    HPFSRem only needs to be used when a disk being removed or

      inserted has been formatted with HPFS. When only disks

      formatted with FAT are involved, the methods supplied with

      your removable drive may be used.

    Before you shutdown the system, you may need either an HPFS

      disk in your removable drive or have used a FAT disk in

      the drive last. The FAT disk needs to be used in some way

      (typing "dir" at the command line is good enough) and may

      be removed before shutdown. Failure to meet these

      conditions may prevent a proper shutdown of the system if

      you booted the system with a FAT disk in the removable

      drive. Booting with an HPFS disk seems to prevent this


    It is best to partition removable disks with a logical, not

      primary, partition weather or not HPFS will be used on the

      disk. If OS/2 is booted from a logical partition, then

      attempting to use a removable disk with a primary

      partition will cause the system to crash. Partitioning the

      disks with a logical partition avoids this problem and

      works fine with systems that boot OS/2 from a primary

      partition. If you use a SyQuest drive, the DOS/Windows

      drivers will have no trouble using logical partitions.

    Before a disk can be removed, all programs must stop using

      files on the disk. If a program has a file open on the

      removable disk, HPFSRem will give an error and will not

      unlock the disk. Also, it is a good idea to close all

      views of the files and directories on the disk before

      removing it.

    OS/2 uses a feature called lazywrite that buffers data to be

      written to a disk to improve performance. HPFSRem always

      makes certain that all data to be written to the removable

      disk is written before removal.

Known problems and limitations

    If you copy files with long names to a removable HPFS disk

      using the WPS (drag & drop), the result may be

      interesting. Although folder views of the directory on the

      HPFS removable will have long names, the files on the

      removable disk may not have long names. If you type "dir"

      at a command prompt, and find that the long names of the

      files are not in the directory, then you have this


      One way around this problem seems to be to put an HPFS

      formatted disk in the removeable drive before booting

      OS/2. Then, all files copied to the disk from the WPS will

      retain their long names.

      Another work around is to use the command line. A copy

      command issued from the WPS will convert the long names of

      files to names suitable for FAT volume. However, if you

      copy files from the command line, the long names will be

      preserved. Note that from the command line you cannot copy

      a file with a long name to a FAT volume.

    This program does not allow the use of HPFS on floppies.

      This is because HPFS can only be put on partitioned disks.

      Floppies cannot be partitioned. This is a limitation of

      OS/2, but so is not supporting HPFS on removable disks


    HPFSRem supports only a single partition on removable disks.

      Multiple partitions on a removable disk will cause


    Occasionally, the system may not complete a shutdown

      properly. This sometimes seems to be in connection with a

      drive not ready error from the removable drive. The cause

      of the error is trying to read from the drive when no disk

      is in it. Avoid this error. Also, limiting yourself to

      using the "RI" parameter for HPFSRem and using HPFSRem

      when any disk is being inserted or removed, not just HPFS

      disks, may help solve the problem.

    If data loss occurs when removing FAT disks from the drive,

      use HPFSRem to remove FAT disks as well as HPFS disks. The

      data loss may come from using lazywrites on the disk. The

      lazywrite feature will cache writes to the disk, so some

      data to be written may be held in buffers when a disk is

      removed. HPFSRem will make OS/2 write the contents of the

      buffers to the disk, so no data loss will occur from

      caching writes to the disk.


    To help me keep track of what I put on my removable disks, I

    made a simple disk label template for use with IBM Works.

    The label, included in this package, is made for EZ135

    disks, but could be altered for use with other disks.

    To make use of the label, load it with IBM Works and save it

    with a different name. You can change the "Spine

    Description" by double clicking your mouse on it. You'll be

    presented with a dialog where you you can change the text

    and its orientation. Be sure that the bottom right icon on

    this dialog is pressed or the text won't be vertical


    There are two tables on the left and right sides of the

    label. You can type text into these tables. If you press tab

    at the end of the table, you'll get another row and a

    horizontal line to go with it. This can't be undone without

    deleting and remaking the table. Its not my fault --

    IBMWorks needs some work.

    You can also add a vertical line to the table to separate

    some of the rows into columns. The vertical line doesn't

    have to divide all the rows. Also, it seems that only one

    vertical line can be used. If you add a third, no text will

    be displayed to the right of the line.

    Before you print the label, you may have to go to the

    printer setup dialog and tell your printer to print

    landscape style. I don't know why this is necessary, as IBM

    Works has been told to use landscape style for the label. It

    might be because I'm using OMNI.DRV to run my printer.

    Next, tell IBM Works to print only the first page, or you'll

    get an empty page at the end.

    Finally, cut along the outer lines and put the printed label

    in place of the blue label shipped with disk.

Future posiblities

    Documentation in HTML (anyone got space on a web server I

      could use for this?)

    An install program that adds a menu option to the object of

      the removeable drive for HPFSRem (way in the futrue)


    HPFSRem may be employed for personal use at no charge.

    For commercial use, HPFSRem may be used for a 30 day trial

    period. For continued use beyond the 30 day trial period, it

    must be registered.

    To register, send a check for $20 (in US currency, or

    discuss other possibilities with me) made out to Jeffrey

    Jackowski and address the envelope to:

          608J South Loop Road

          Huntsville, AL 35805

    Send your email address so that I can send you your

    registered copy via email. Or, send a floppy with your check

    and I'll return it with the registered software. (But

    remeber, I don't know how to send mail internationally.)

About the programmer

    I, Jeff Jackowski, am a student at the University of Alabama

    in Huntsville. Not long after I bought my computer at the

    beginning of 1995, I have been running OS/2 Warp on it. I

    decided to run OS/2 after reading good things about it in

    some periodicals starting a year or two before I bought it.

    Too bad its harder to find such good words about OS/2 in the

    general press now.

    I can be reached at jackowskij@@email.uah.edu, but since I

    am sometimes busy with classes, it may take me a while to



    HPFSRem -- Copyright 1996 by Jeffrey Jackowski


    HPFSRem now uses the GNU General Public License.

    It should be included in the same archive as HPFSRem with

     the name "COPYING". It may not be changed.