CorelSCSI 2.0 README Contents
=============================

This document provides information you should know before 
installing CorelSCSI version 2.0. Last minute product and 
device information is also documented.

If you have any comments or questions about this product that
your distributor can't answer, contact Corel Technical Support:

    Telephone: (613) 728-1010. Monday to Friday between the 
                               hours of 8:30 AM to 5:00 PM 
                               Eastern Standard Time. 

    Interactive Voice Answering Network (IVAN) system provides 
    24-hour support at (613) 728-1010.

    CompuServe:  Log into CompuServe and access the Corel forum 
                 by entering GO COREL.

    BBS: (613) 728-4752

Table of Contents
=================

1.  Upgrading to CorelSCSI 2
2.  Installing ASPI Managers
3.  Loading Corel's Device Drivers
4.  Rewritable Only Driver
5.  Using Memory Managers
6.  Using DOS SCANDISK and DBLSPACE
7.  Backup for Windows
8.  CD-Audio for Windows
9.  Tools for Windows
10. CorelCDX for Windows and DOS
11. DOSAUDIO for DOS
12. DOSTOOLS for DOS
13. Using PC-DOS with Corel's DOS Utilities
14. Undocumented Commands
15. Support for Kodak Photo CDs
16. Digital Audio Sampling


1.  Upgrading to CorelSCSI 2
----------------------------

If you're upgrading from CorelSCSI for DOS or Windows 
version 1.2 or earlier, you must remove any system patches, 
using the existing version of CorelSCSI, before installing 
CorelSCSI 2.

To remove a patch
1.  At the command prompt, enter PATCH.
2.  Select Remove Patch.


2.  Installing ASPI Managers
----------------------------

You must install an ASPI manager and load it in 
your CONFIG.SYS file before installing CorelSCSI. If you 
have problems with any ASPI manager, contact the 
manufacturer of your card.

To install an ASPI manager 
  
1.  Copy the ASPI manager from the disk provided with your 
    SCSI card to your hard drive.

2.  Add the device driver line to the CONFIG.SYS file using 
    the following syntax:

      DEVICE=C:\xxxx.SYS

      where xxxx indicates the name of your ASPI manager.

3. Reboot the system before you start the CorelSCSI 
   installation.

    While the system is rebooting, you should look for 
    status messages from the ASPI manager. If the status 
    indicates an unsuccessful installation, the CorelSCSI 
    device driver won't function.
    
  
3.  Loading Corel's Device Drivers
----------------------------------

During the installation, you're prompted to choose whether
to load the Corel CD-ROM and write-once/rewritable device
driver into high memory. If you choose this option and
not enough memory is available, the drivers won't load.

To correct this problem, edit the CONFIG.SYS file. For
each device driver command, replace the DEVICEHIGH 
keyword with DEVICE.


4.  Rewritable Only Driver
--------------------------

CorelSCSI Version 2.0 included two drivers: CUNI_ASP.SYS for CD-
ROM drives and UNI_ASP.SYS for rewritable and WORM drives. This 
version includes a third driver, REW_ASP.SYS, which only supports 
rewritable drives. You should use REW_ASP.SYS instead of 
UNI_ASP.SYS if you are only using rewritable media and you wish 
to reduce the amount of memory used by the driver.

The driver functions in exactly the same manner as the original 
write-once and rewritable device driver with two exceptions: the 
rewritable only driver uses much less memory than the original 
write-once and rewritable device driver and it doesn't provide 
any caching. 

The rewritable only driver is copied to your system with the 
other CorelSCSI drivers but it is not added to your CONFIG.SYS 
file. In order to use this driver, simply remark out the write-
once and rewritable device driver line from the CONFIG.SYS file 
and add a new line for REW_ASP.SYS.

Example:     REM DEVICE=C:\CORELDRV\UNI_ASP.SYS
             DEVICE=C:\CORELDRV\REW_ASP.SYS

Note that this driver also works with multi-function drives but 
if you try to access WORM media, the driver will return a message 
that indicates the media is invalid.
   

5.  Using Memory Managers
-------------------------

If you're using a memory manager, you may need to uninstall 
it before installing CorelSCSI and then reinstall the 
memory manager. In rare cases, systems may hang if CorelSCSI 
is installed while a memory manager is loaded.


6.  Using DOS SCANDISK and DBLSPACE
-----------------------------------

Don't compress media you plan to use with Corel's SCSI 
utilities using DBLSPACE or other compressing tools.

Similarly, don't use the DOS SCANDISK command. This command
may display incorrect results about the media.


7.  BACKUP (Windows)
--------------------

During small tape backups, the status display shows the tape 
rewinding before the progress bar gets to 100%. This is a 
graphics update problem. All requested data was written to 
the tape. To verify that all the data has been backed up, 
open a log file using Preferences from the File menu and 
then perform a full verify of the backup. The log file will 
confirm that all files were properly backed-up.

A problem has been reported with file tagging when you have 
a directory structure as follows:
 
     dir1
     |
     +---dir_with_files_1
     |
     |
     +---empty_dir_1
     |
     +---empty_dir_2
     |
     +---dir_with_files_2

If you 
    *  untag "dir1"
    *  tag some files in "dir_with_files_1"
    *  tag "empty_dir_1"
    *  untag "dir_with_files_2"

the application should show a grayed checkbox for "dir1", 
meaning that some files will be backed-up. Instead, the 
checkbox shows that no files will be backed-up, even though 
the checkbox for "dir_with_files_1" indicates that some of 
its files will be backed-up. 

WARNING: If you proceed with this backup, none of the files 
in "dir_with_files_1" will be backed-up! The solution is to 
tag the files and directories in a different order.


8.  CD-Audio 2 (Windows)
------------------------

CD-Audio 2.0 supports Microsoft's Music Box 2.0. Any track 
information you've entered using MusicBox is imported into 
CD-Audio.
 
If you're using an LMSI CM234 CD-ROM drive, the status 
information may not display the correct information. This is 
a problem with the drive rather than CD-Audio.
 
If your drive supports digital audio sampling, you can 
record sound files using CD-Audio. The following drive 
models support digital audio sampling:

    *  Toshiba XM-3401/XM-4101
    *  Sony CDU561 (and OEM versions such as Compaq CDV561)
    *  Apple CD300
    *  Matsushita CR533B
    *  NEC 4x Multi-Spin (CDR-900)
    *  Panasonic CR503

9.  TOOLS (Windows)
-------------------

If you're using an IBM host adapter and its ASPI manager, 
the information displayed by the Device Information command 
is incorrect. 
 
When formatting a hard disk that has previously been 
formatted with multiple partitions, you should reboot when 
the format is complete. DOS will let you access the original 
logical partitions even though they no longer exist.
 
Corel has detected spurious errors while running diagnostics 
on various optical drives. These errors should not be 
thought of as hardware or media failures unless they occur 
repeatedly while diagnostics is looping continuously.

10.  CorelCDX (Windows and DOS)
-------------------------------

To work with your CD-ROM drives, you require a CD-ROM 
extensions program, such as CorelCDX, which interprets the 
CD-ROM file system format. CorelCDX also provides several 
types of caches, including a path table, directory, and data 
cache. These caches are discussed in detail in the Users' 
Manual. As an extension to CorelCDX, CDXCACHE provides an 
extended memory data cache.

CDXCACHE, if enabled, is loaded at the same time as 
CorelCDX.  This cache stores information recently read from 
CD-ROM drives in extended memory. When information requested 
by an application is located in the cache, the information 
can be accessed more quickly than re-reading the information 
from the drive.

CDXCACHE uses a least recently used (LRU) algorithm: 
frequently used data remains in the cache and infrequently 
used data is discarded from the cache. CDXCACHE works best 
with database type applications, which repeatedly read 
information from the same areas of a CD.

CDXCACHE can cache the first 16 CD-ROM drives connected to 
your system. The cache page size affects the maximum 
cacheable sector address.

The following CDXCACHE options may appear in the CorelCDX 
section of the CRLSCSI.INI file:

    * XMSSIZE indicates the cache size in kilobytes. You can 
      set XMSSIZE to 0 to disable the XMS cache. Note that 
      the number of tracks created on a CD by CDCOPY is 
      affected by the amount of available XMS memory, you 
      should disable the extended XMS cache when using 
      CDCOPY.

      You can set XMSSIZE to -1 to use a default cache size, 
      which is equal to one-quarter of the free XMS memory.

      You can also set XMSSIZE to  a specific size from 64K 
      to 16384K.

    * XMSPAGE configures the number of sectors per cache 
      page, which determines the read-ahead operations. The 
      value of 4 is recommended for smaller cache sizes; 
      it's more important to cache separate disk reads than 
      to perform read aheads. Use the value 8 for larger 
      cache sizes; more data is stored in one operation. The 
      default setting is 4 sectors per cache page.

    * XMSBLOCK represents the maximum size of read request 
      in sectors that will be cached. The cache performance 
      may benefit from larger values. However, the cache may 
      fill up more quickly. The default setting is 4 
      sectors.

Both CDXCACHE and Microsoft's SmartDrive program use 
extended memory caching. If you're using SmartDrive version 
5.0, provided with MS-DOS 6.2, you can use SmartDrive rather 
than CDXCACHE. However, CDXCACHE has smaller overhead and 
operates faster then SmartDrive. 

SMARTDRV.EXE 5.0 is designed to work exclusively with 
Microsoft's MSCDEX CD-ROM driver. However, Corel's 
PATCH_SD.COM modifies SMARTDRV.EXE to recognize CorelCDX as 
a valid CD-ROM driver.

PATCH_SD creates a copy of the existing SMARTDRV.EXE program 
and stores the copy as SMARTDRV.MSC. If you've made changes 
to SMARTDRV.EXE version 5.0 that change its size, such as 
compressing the file, from 45145 bytes, PATCH_SD won't work.

To modify SmartDrive to recognize CorelCDX

1.  At the command prompt, enter PATCH_SD.
   
2.  Check your AUTOEXEC.BAT file to ensure that CorelCDX is 
    loaded before SmartDrive; otherwise, SmartDrive won't 
    find, and therefore cache, CD-ROM drives. Since 
    SmartDrive is loaded after CorelCDX, you can't use the 
    CorelCDX /UNLOAD command.
   
3.  Use the CorelCDX section of Configuration to set the XMS 
    Cache Size option to Disable. The CDXCACHE is enabled, 
    by default. If you don't disable the cache, both 
    CDXCACHE  and SmartDrive will cache data, using twice 
    the necessary  amount of extended memory.
   
4.  Reboot your system to reinstall SMARTDRV.EXE.

Miscellaneous Information:

If you're using DOS 5.0, Norton Shell 6.0, and CDXCACHE, 
Windows won't run. Remove or upgrade any one of the three 
programs to resolve this problem.

If you run CDSESN, CD-ROM caching software, including 
CorelCDX/CDXCACHE, will flush any cached data for the 
specified drive even if the currently selected session is 
not changed.

The DRIVERNAME option of the CRLSCSI.INI file provides the 
required name of the CD-ROM device driver, which should be 
the same as the value of the DRIVERNAME option in the [CD-
ROM Drivers] section of this file. CD-ROM device drivers are 
numbered starting from MSCD001.

If CorelCDX can't find driver names in the CRLSCSI.INI file 
or if the CRLSCSI.INI file is missing, CorelCDX will try to 
locate and initialize the CD-ROM device drivers named, by 
default, 'MSCD001' and 'MSCD099'.


11. DOSAUDIO (DOS)
------------------

If your drive supports digital audio audio sampling, you can 
record sound files using CDDA. The following drive models 
support digital audio sampling:

    *  Toshiba XM-3401/XM-4101
    *  Sony CDU561 (and OEM versions such as Compaq CDV561)
    *  Apple CD300
    *  Matsushita CR533B
    *  NEC 4x Multi-Spin (CDR-900)
    *  Panasonic CR503

If you're using an LMSI CM234 CD-ROM drive, the status 
information may not display the correct information. This is 
a problem with the drive rather than DOSAUDIO.


12. DOSTOOLS (DOS)
------------------

If you're using an IBM host adapter and its ASPI manager, 
the information displayed by the Device Information command 
is incorrect. 

When formatting a hard disk that has previously been 
formatted with multiple partitions, you should reboot when 
the format is complete. MS-DOS will let you access the 
original logical partitions even though they no longer 
exist.

Corel has detected spurious errors while running diagnostics 
on various optical drives. These errors should not be 
thought of as hardware or media failures unless they occur 
repeatedly while diagnostics is looping continuously.

DOSTools reports a fixed disk as containing removable 
media.

With MS-DOS version 6.0, DOSTools will hang when you try 
to format any media. This problem doesn't occur in MS-DOS
version 6.2. The MS-DOS upgrade is available electronically, 
without charge, or from retailers for a nominal fee.


13. Using PC-DOS with Corel's DOS Utilities
-------------------------------------------

If you're using PC-DOS version 5.0/V in Kanji mode, you must 
switch to US mode before using the CorelSCSI for  DOS 
utilities; otherwise, the utilities won't run.

To switch to US mode, enter the following at the command 
prompt:
 
    CHEV   US  /f


14. Undocumented Commands
-------------------------

The following commands are not documented in the Users' Manual: 

CDXINFO
Provide summary information about CorelCDX.

CHKMEDIA
Updates the operating system with the physical space 
available on a WORM cartridge. When you delete information 
from these cartridges, the information is only hidden. 
Therefore, discrepancies may occur between the reported space 
and the actual space available.

SS
Displays a menu from which you can select a host adapter. 
CorelSCSI scans the selected host adapter and lists the 
SCSI devices detected.

SCANCD [drive:]
Scans the compact disc in the drive specified and 
displays information such as the number of bytes on 
the disc.


15. Support for Kodak Photo CDs
-------------------------------

The Corel CD-ROM device driver, which is named CUNI_ASP.SYS 
currently supports Kodak Photo CDs. Although other drives 
may read the Photo CD format, the following drives have been 
tested by Corel:

   Single session      Multi session
   --------------      ------------------------------------------------
   Chinon CDS435       Chinon CDS535                Teac CD-50
   NEC CDR73           GoldStar GCD-R322            Texel DM-3024K
   NEC CDR73M          Hitachi CDR-3750/CDR-6750    Texel DM-5024K
   NEC CDR74           Matsushita CR-533B           Toshiba XM3301 (with 
   NEC CDR83           NEC CDR74-1                   multi session upgrade)
   NEC CDR83M          NEC CDR84-1                  Toshiba XM3401
   NEC CDR84           NEC 3x CDR-600
   Sony CDU-541        NEC 4x CDR-900
   Sony CDU-6211       Panasonic CR-532
   Texel DM-5024       Philips CDD-521
   Texel DM-3024       Smart & Friendly HS-2200 i/e
   Toshiba XM3301      Sony CDU-561

16. Digital Audio Sampling
------------------------- 

Using CD-Audio for Windows and CDDA for DOS, you can 
record digital audio. The following drive models support 
digital audio sampling:

    *  Toshiba XM-3401/XM-4101
    *  Sony CDU561 (and OEM versions such as Compaq CDV561)
    *  Apple CD300
    *  Matsushita CR533B
    *  NEC 4x Multi-Spin (CDR-900)
    *  Panasonic CR503
