Tekram Technology DC-395U User manual

DC-395 Series User’s Manual 11
DC-395 Series
PCI SCSI Host Adapters
User’s Manual
Manual Rev: 3.00
Date: January 99
Model Number Protocol Mode SCSI
Width Max Xfer Rate (MB/S) Max Devices
DC-395U SCSI-3 SE 8-bit 20 7
DC-395UW/F SCSI-3 SE 16-bit 40 15
U: Ultra SCSI (Narrow); UW, F: Ultra SCSI (Wide)
The designation DC-395 is used throughout this manual in reference to the common features
of all the above models. Any discrepancies or special features not supported by the entire
DC-395 Series are described using specific model numbers.
* All other product names are trademarks or copyrights of their respective owners.

DC-395 Series User’s Manual
22
FCC Compliance Statement
This equipment has been tested and found to comply with limits for a Class B digital device,
pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference in residential installations. This equipment generates,
uses, and can radiate radio frequency energy, and if not installed and used in accordance with
the instructions, may cause harmful interface to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does
cause interference to radio or television equipment reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
•Reorient or relocate the receiving antenna
•Move the equipment away from the receiver
•Plug the equipment into an outlet on a circuit different from that to which the
receiver is connected
•Consult the dealer or an experienced radio/television technician for additional
suggestions
Only equipment certified to comply with Class B should be attached to this equipment, and
must have shielded interface cables.
The FCC requires the user to be notified that any change or modifications to the equipment
by the user not expressly approved by the grantee or manufacturer could void the user's
authority to operate such equipment.
This device complies with Part 15 of the FCC rule. Operation is subjected to the following
two conditions: 1) This device may not cause harmful interference and 2) This device must
accept any interference received, including interference that may cause undesired operation.
DC-395 Series
Tested to Comply
with FCC Standards
For Home or Office Use

DC-395 Series User’s Manual 33
TABLE OF CONTENTS
1. INTRODUCTION.................................................................................5
2. HARDWARE SETUP..........................................................................6
2.1 Board Layout....................................................................................................7
2.2 Setting the Jumpers...........................................................................................8
2.3 Setting the SCSI IDs.........................................................................................8
2.4 Checking the Terminators on the SCSI Bus.......................................................9
2.5 Cable Connection ...........................................................................................10
3. CONFIGURING YOUR SCSI CARD..................................................11
3.1 Setting the System BIOS.................................................................................11
3.2 Running the PCU (PCI Configuration Utility)..................................................12
3.2.1 Show Adapter Information ..................................................................13
3.2.2 Set Adapter Options............................................................................14
3.2.3 Set Devices Options............................................................................19
3.2.4 Show SCSI Devices.............................................................................21
3.2.5 Low Level Format Utility....................................................................22
3.2.6 Verify Disk Utility...............................................................................22
4. DOS ASPI DRIVERS & UTILITIES ...................................................23
4.1 Easy DOS Driver Installation Software (INSTALL.EXE) ................................24
4.2 Installing the ASPI Driver...............................................................................27
4.3 Installing the TRMDISK.SYS Driver..............................................................27
4.4 Disk Partition Utility.......................................................................................29
4.5 Installing the CD-ROM Driver........................................................................30
4.6 Installing Tape Streamer (DAT)......................................................................31
5. NETWARE DRIVERS .......................................................................32
5.1 ASPI Drivers for NetWare..............................................................................33
5.1.1 NetWare 5.0 .......................................................................................33
5.1.2 NetWare 4.xx......................................................................................33
5.1.3 NetWare 3.12/SFT-III .........................................................................35
5.1.4 Driver Options....................................................................................37
5.2 Server-based Backup/Restore Support.............................................................38
5.3 Removable Media Support..............................................................................38
5.3.1 Mounting a File System.......................................................................38

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5.3.2 Dismounting a File System..................................................................39
5.4 Duplexing ......................................................................................................39
6. OS/2 DRIVERS.................................................................................40
6.1 New OS/2 Installation.....................................................................................40
6.2 Adding the Driver to an Existing OS/2 System ................................................40
6.3 Un-installing the Driver..................................................................................41
6.4 Command-Line Switches for TRM3X5.ADD..................................................42
7. WINDOWS NT DRIVERS..................................................................43
7.1 New Windows NT Installation........................................................................43
7.1.1 Boot from Diskette:.............................................................................43
7.1.2 Boot from CD-ROM :..........................................................................44
7.2 Adding the Driver to an Existing NT System...................................................45
7.2.1 For NT Versions 3.5x..........................................................................45
7.2.2 For NT Versions 4.x............................................................................46
7.3 Removing the SCSI Host Adapter from the System .........................................46
7.3.1 For NT Versions 3.5x.........................................................................46
7.3.2 For NT Versions 4.x............................................................................46
8. WINDOWS 95/98 DRIVERS..............................................................47
8.1 New Windows 95/98 Installation.....................................................................47
8.1.2 New Windows 95 OSR2.......................................................................48
8.1.3 New Windows 98 ................................................................................48
8.2 Adding the Driver to an Existing 95/98 System ...............................................49
9. SCO UNIX DRIVERS........................................................................52
9.1 New SCO UNIX Installation...........................................................................52
9.1.1 How to prepare a driver diskette .........................................................52
9.2 Adding the Driver to an Existing SCO UNIX System ......................................54
APPENDIX...............................................................................................55
A. Specifications.................................................................................................55
B. Product Support Form.....................................................................................56
C. General Troubleshooting Tips.........................................................................57
D. Flash BIOS Programming Utility ....................................................................59

DC-395 Series User’s Manual 55
1. INTRODUCTION
The DC-395 series is a SCSI (Small Computer System Interface) bus to PCI bus host adapter,
which complies to the PCI 2.1 specification with Plug-&-Play (PnP) readiness. By using the
Disconnect/Reconnect technique, performance degradation during multitasking operations is
prevented. Other enhanced SCSI-2 features such as scatter-gather and command-tag queuing
are supported. The DC-395 series supports ASPI (Advanced SCSI Programming Interface)
managers for the following operating systems to assure operation with popular third party
applications:
•MS-DOS •Windows 95/98/NT •OS/2 2.0/WARP 3.0/4.0 •NetWare 3.x/4.x
Device drivers are also supported for the following major operating systems for
compatibility with a full range of SCSI peripherals including CD-ROMs, Photo CDs, tape
backups, scanners, removable media and SCSI hard drives:
•MS-DOS •Windows NT 3.x/4.0/2000
•OS/2 2.0/WARP 3.0/4.0 •Windows 95/98
•SCO Unix 3.2v4.x & OpenServer 5.0.x •NetWare 3.x/4.x/5.0
•UnixWare 1.1/2.1.3/7.0.1
•Linux
•Solaris 2.6/7.0
•FreeBSD
* UnixWare, SlackWare/RedHat Linux, and FreeBSD drivers can be accessed via
www.tekram.com or ftp.tekram.com/scsi.
Most SCSI Adapters require device drivers to support more than 2 hard drives under DOS.
The DC-395 series, however, provides special support to handle up to eight devices,
including fixed disks and removable media under MS-DOS 5.0/6.x, without the need for
device drivers (More than 2 drives support).
The on-board menu-driven setup and jumperless design of the DC-395 series allow you to
configure the host adapter, SCSI devices, and BIOS-related parameters without opening your
computer. The DC-395 series also provides a utility program that supports low-level
formatting. And with the help of the DOS driver installation software (INSTALL.EXE), the
drivers are easily installed and the CONFIG.SYS and AUTOEXEC.BAT files are
automatically updated.
The fully intelligent solution provided by the DC-395 PCI to SCSI Host Kit is ideal for
multitasking environments such as OS/2, NetWare, Unix, Microsoft Windows 95/98 and
Windows NT, as well as next generation operating systems such as Microsoft Windows NT
5.0.

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66
2. HARDWARE SETUP
Static Precautions
Static electricity can be a serious danger to the electronic components on this board. To avoid
damage caused by electrostatic discharge, observe the following precautions:
üDon’t remove the board from its anti-static packaging until you are ready to install it into
a computer case. Also, handle add-in cards and modules by the edges or mounting
bracket.
üBefore you handle the board in any way, touch a grounded, anti-static surface, such as an
unpainted portion of the system chassis, for a few seconds to discharge any built-up static
electricity.
Before plugging the DC-395 series adapter into your system, make sure all jumpers on the
card are correctly set according to the instructions outlined in section 2.2. Also take care that
the SCSI ID number (0-6 for DC-395U; 0-15 for DC-395UW/F) of each SCSI device is set
properly for the host adapter (Section 2.3).
The maximum devices that can be installed on each model are show below:
Model # Max. Devices Number
DC-395U 7
DC-395UW/F 15 *
•For DC-395U, up to seven 8-bit SCSI single ended (SE) devices can be connected.
•For DC-395UW/F, up to fifteen 16-bit and/or 8-bit SCSI single ended (SE) devices can
be connected. Up to seven of these can be 8-bit. And only two of the three SCSI
connectors, either Internal or External, can be used to connect SCSI devices at any given
time.
Correct termination and cable connections are also necessary for SCSI adapters to function
properly (Section 2.4 and 2.5).

2. HARDWARE SETUP
DC-395 Series User’s Manual 77
2.1 Board Layout
The following figures illustrate the jumper and connector locations for the DC-395 Series
PCI SCSI Host Adapters:
DC-395U Ultra SCSI-3 adapter
DC-395UW Ultra WideSCSI-3 adapter

2. HARDWARE SETUP
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88
2.2 Setting the Jumpers
DC-395U/395UW/F: JP1 (LED)
SCSI Device Activity LED Indicator (JP1)
JP1 is used to indicate activity of the SCSI devices controlled by the DC-395 series adapter,
and should be connected to the cable leading to the Hard Drive LED on the front panel of
your computer case.
2.3 Setting the SCSI IDs
Each SCSI device attached to the SCSI card, as well as the card itself, must be assigned a
unique SCSI ID number. SCSI ID 7 is preset to the SCSI card, giving it the highest priority
on the SCSI bus.
The SCSI IDs of your peripheral devices are usually set with jumpers or with a switch on the
peripheral. Refer to the peripheral manufacturer’s manual to determine the ID of each device
and how to change it.

2. HARDWARE SETUP
DC-395 Series User’s Manual 99
2.4 Checking the Terminators on the SCSI Bus
In order to stabilize the SCSI bus, only two sets of terminators can be installed - one at each
end of the SCSI bus. The DC-395 series is equipped with Active Terminators that
automatically switch from Enabled to Disabled or vice versa by scanning the devices
connected on the SCSI bus. So, manual termination adjustment is not required. The following
explains the terminator configuration of other devices on the SCSI bus:
1. When only internal devices are connected to the DC-395 series adapter: Leave the
terminator mounted on the last device only, with the SCSI card being the first SCSI
device. Remove terminators on all other devices connected in between.
2. When only external devices are connected to the DC-395 series adapter: Leave the
terminators mounted on the last device only. Since external SCSI devices are daisy
chained, this would be the device without another SCSI cable plugged into it. Remove
terminators on all other devices connected in between.
3. When both internal and external devices are connected to the DC-395 series adapter:
Leave only the terminators mounted on the last internal device and the last external
device. As in the above case, remove the terminators from all other devices connected in
between.
Note1: For DC-395UW/F only: When both Narrow (8-bit) and Wide (16-bit) devices are
connected to the Wide SCSI connector (either Internal or External), arrange the
devices so that a Wide device with termination enabled is at the end of the bus. A
Narrow device at the end of the bus can have termination problems in this case,
since the Wide bus is 16-bit and the terminator on the Narrow device is only
effective for the lower 8-bit (not the whole 16-bit).
Note2: There are two types of termination available on SCSI devices, active and passive.
Active termination is strongly recommended to ensure system integrity, particularly
when devices with high transfer rates are being used. A SCSI CD-ROM drive
usually comes with a passive terminator. For proper termination, it is recommended
that you keep this terminator disabled, i.e. avoid connect the CD-ROM drive at the
end of the SCSI bus

2. HARDWARE SETUP
DC-395 Series User’s Manual
1010
2.5 Cable Connection
Model # External Internal
DC-395U CN1: 50-pin; 8-bit CN2: 50-pin; 8-bit
DC-395UW*CN1: 50-pin; 8-bit CN2: 68-pin; 16-bit (wide)
CN3: 50-pin; 8-bit
DC-395F CN1: 68-pin; 16-bit CN2: 68-pin; 16-bit (wide)
CN3: 50-pin; 8-bit
* Only two of the three connectors can be used to connect SCSI devices at the same time.
External SCSI connector: This high density D-type SCSI connector is for connecting
external SCSI devices.
Internal SCSI connector: The internal flat cable should connect to the internal SCSI
connector with its colored stripe, normally red, aligned with Pin 1 of the connector.
Maximum length of the SCSI bus is determined by the number of devices and the data
transfer rate. The following table summarizes the maximum allowable cable lengths for the
DC-395 series:
Model # SCSI Type Data Xfer
Rate Max. # of Devices Max. Cable Length
DC-
395U/UW/F Ultra /Ultra Wide SCSI 20/40 MB/Sec 43meters (9.8 feet)
•If there are internal devices connected, the internal cable length must be included in
the measurement of SCSI bus length.

DC-395 Series User’s Manual 1111
3. CONFIGURING YOUR SCSI CARD
3.1 Setting the System BIOS
After the DC-395 is inserted in an available PCI-BUS slot and the jumpers and cables are
properly set, first turn on the power to your external SCSI devices and then power on the
system. When installing a SCSI drive as drive C: (or D:), set the CMOS HDD drive type
according to the IDE drive installed. The CMOS HDD is NOT related to SCSI HDD.
Note:With most mainboards, IDE (Intelligent Drive Electronics)/ST506 and ESDI
(Enhanced Small Device Interface) drives always take precedence over SCSI drives.
That means that if one IDE/ST506/ESDI drive has already been installed, you cannot
install the SCSI drive as drive C:. If two IDE/ST506/ESDI drives already exist, no
SCSI drives can be installed as C: or D:. However, if your mainboard BIOS has
multiple boot options, such as “boot from SCSI device”, this will allow the system to
boot from any bootable SCSI device connected to the DC-395 series controller.
Since the mainboard BIOS will automatically shadow the PCI adapter’s BIOS, there is no
need to set the shadow option between C800 and DFFF. This option is for ISA adapter ROM
only. The I/O Base Address and IRQ ROM shadow addresses are also assigned by the
mainboard BIOS automatically. You do not need to worry about it. Just Plug & Play and
enjoy it.
Right after exiting the system BIOS CMOS setup, the following message will pop up and
prompt you to enter the PCI Configuration Utility to configure the card:
TEKRAM DC-395UW PCI-SCSI Controller
BIOS v3.00 Date: 1999-02-22
Installed at IOPORT = 6800h, IRQ =10 - Level triggered
BIOS ROM mapped at C800h
<< Press F2 or F6 to enter configuration Menu >>
ID-LUN:6-0 MICROP 2217-15MZ1001905HQ30 Fixed disk 1678MB ==> C: (80h)
C/H/S=214/253/63, Xfer Rate=20.0MB/Sec, Sync Offset=15Bytes
ID-LUN:3-0 SONY CD-R CDU924S 1.1d CD-ROM
Xfer Rate=4.0MB/Sec, Sync Offset=15Bytes
SCSI BIOS installed !

3. CONFIGURING YOUR SCSI CARD
DC-395 Series User’s Manual
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3.2 Running the PCU (PCI Configuration Utility)
Since the DC-395 series is PCI compliant with Plug-&-Play (PnP) readiness, the system
should allocate the proper Interrupt Level, Adapter BIOS Address and other settings
automatically. Still, entering the PCU allows you to view more information and set additional
options for both the DC-395 series adapter and the SCSI Devices. Utilities for verifying bad
blocks and low level formatting are also included. Another alternative is to run the provided
DOS utility program UTIL.EXE, which performs the same functions as the PCU does.
Note: UTIL.EXE may be the only way to change options in the configuration of DC-395
series adapter in the event that either a) The DC-395’s BIOS is disabled OR b) The
option “F2 or F6 Function During Bootup” is disabled. It also allows you to modify
your settings without rebooting to enter the PCU. When running UTIL.EXE, it’s best
to boot clean from a DOS floppy disk.
After powering up the system, the DC-395's BIOS will show a message indicating its BIOS
version with a date code and information about the IOPORT address, IRQ number and
address that the ROM BIOS is mapped at. Upon pressing the <F2> or <F6> key, the
following screen will pop up:
Select An Adapter To Setup
DC-395U/UW/F or DC-315/U BUS#00 DEV#0C IOPORT = 9600h IRQ = 11
If two or more adapters are installed, choose the desired adapter to proceed with the
configuration. After pressing <Enter>, the SCSI bus will be reset and the SCSI IDs for all
devices installed on the SCSI bus will be scanned. A selection table for further operations
will be shown as follows:
Function Selection
Show Adapter Information
Set Adapter Options
Set Devices Options
Show SCSI Devices
Low Level Format
Verify Disk
The sections that follow contain detailed descriptions of the above options.

3. CONFIGURING YOUR SCSI CARD
DC-395 Series User’s Manual 1313
3.2.1 Show Adapter Information
This screen displays detailed information about the SCSI chip, ROM BIOS address, I/O port
address, IRQ, PCI interrupt line, etc. The information about the SCSI Chip, IRQ Trigger
Type and Data Xfer Type is provided by the DC-395 series adapter itself. The rest of the
information in this table is provided by the mainboard's BIOS, which should support the PCI
PnP specification. This information cannot be modified.
Adapter Information
SCSI Chip …………………... TRM-S1040
Bus Type ……………………. PCI Bus
Bus# ………………………… 00h
Device# ……………………... 08h
Function# ……………………. 00h
BIOS ROM mapped at ……... C800h
IO Address ………………….. D800h
PCI Interrupt Line ………….. INTA#
IRQ# ………………………... 11
IRQ Trigger Type …………... Level triggered
Data Xfer Type ……………... PCI Bus Master

3. CONFIGURING YOUR SCSI CARD
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3.2.2 Set Adapter Options
Set Adapter Options
Adapter SCSI ID ………………………. SCSI ID 7 -- Default
Boot Device ID ………………………… SCSI ID 0 -- Default
Boot Device LUN ……………………... LUN 0 -- Default
Boot From CD-ROM ………………….. Disabled -- Default
INT13 Extension ……………………… Enabled -- Default
Greater Than 1G Support ……………... Enabled -- Default
More Than 2 Drives Support ………… Enabled -- Default
Removable Media as BIOS Device …. Boot only -- Default
Immediate Return on SEEK Command… Disabled -- Default
Scan All LUN For Devices…………… Disabled -- Default
Active Negation ……………………….. Enabled -- Default
Power on RESET SCSI Bus ………….. Enabled -- Default
Delay Before BIOS scans device ……… 3 sec -- Default
Max Number of Tagged Commands … 32 -- Default
Parity Check ….…………………….. Enabled -- Default
F2 or F6 Function During Bootup ……. Enabled -- Default
Pressing <F8> will reset all the settings to their default values.
Adapter SCSI ID: 0-7. The default ID for the DC-395 series adapter is 7. It is recommended
not to change this default value of 7, as it gives the adapter the highest priority on the SCSI
bus. However, if you have two adapters on the same SCSI bus, you should give one of them a
currently unassigned ID.
Note:For DC-395UW, sixteen SCSI IDs 0-15 are available. If there is any 8-bit device
connected on the SCSI bus, avoid setting the adapter SCSI ID to the number 8 or
larger otherwise you may run into difficulties.
Boot Device ID: SCSI ID 0 (default) – 7 (DC-395U) or 15 (DC-395UW). This option allows
you to boot from any bootable devices connected. To ensure proper operation, see the
following notes:
•If a bootable IDE drive is
installed in the system: The IDE drive will boot by default before any SCSI
devices. This is a function of the mainboard’s BIOS. To
boot from a SCSI device in this case, a setting in the
mainboard BIOS such as “Boot From SCSI” must be
available.

3. CONFIGURING YOUR SCSI CARD
DC-395 Series User’s Manual 1515
•Booting from a removable
SCSI device:The above applies. Also, the setting Removable media as
BIOS device (see page 17) should be set to “Boot drive
only” *
•Booting from a SCSI CD-
ROM:The setting Boot From CD-ROM (see below) must be
“Enabled” (for CD-Changer, Boot Device LUN may need
additional configuration). This setting takes precedence
over the boot device setting in the mainboard’s BIOS.
(*) Since removable media with 2048 Byte/sector is not supported by the system BIOS,
this type of media won’t be accepted as a Bootable device by the system.
Boot Device LUN: LUN 0 (default) - 7. If the SCSI device you wish to boot from has a LUN
number other than 0, this option must be set for the specific LUN number in addition to
setting the Boot Device ID for the SCSI ID number.
Boot From CD-ROM: Disabled/Enabled. When enabled, the option will be given to boot
from CD-ROMs detected by the controller as bootable. This setting takes precedence over
any settings in the mainboard BIOS such as “boot from IDE”. The Boot Device ID and Boot
Device LUN (if LUN is not 0) settings can be adjusted to ensure proper operation. If these
options are left on the default, the bootable CD-ROM with the lowest SCSI ID / LUN number
will boot if there is more than one bootable CD-ROM.
Note: Don’t confuse these settings with the “Boot From CD-ROM” option in the
mainboard’s BIOS setup, which is relevant only to ATAPI CD-ROMs.
INT13 Extension: Enabled (default)/Disabled. When enabled, the DC-395 will support more
than 1024 cylinders for use with operating systems supporting the INT13 Extension. The
conventional INT 13H disk interface supports a maximum of only 1024 cylinders. For
operating systems such as Win95 OSR2 or later, supporting INT13 Extension, the DC-395
will support >1024 cylinders by using the Command Packet Mechanism instead of the
cylinder/head/sector mechanism and thus work with SCSI disks greater than 8GB.
•For operating systems not supporting the INT13 Extension this option will be ignored.
•This setting is not to be confused with Greater Than 1GB Support, which simply remaps
the device’s parameters to compensate for the 1024 cylinder limit. Greater Than 1GB
Support can handle drives up to 8GB in size due to fact that the maximum
cylinders/heads/sectors is 1024/255/63 = 8GB. INT13 Extension supports drives beyond
8GB in supported operating systems by using the Command Packet Mechanism.
Greater Than 1G Support: Enabled/Disabled. FAT (File Allocation Table) file system
Operating Systems such as DOS have traditionally imposed a barrier on the number of
cylinders supported (1024). The option "Greater Than 1GB Support" in the Tekram BIOS
should be enabled if any device has more than 1024 cylinders IF you are using a FAT file
system (DOS, Windows 3.X, Windows 95). Some Operating Systems such as OS/2 and
Windows NT can use either FAT or HPFS/NTFS respectively. For these Operating Systems,

3. CONFIGURING YOUR SCSI CARD
DC-395 Series User’s Manual
1616
the Greater Than 1GB Support feature only needs to be enabled if FAT is to be used as the
file system. *NTFS and HPFS do not impose a 1024 cylinder limit.
•NetWare and UNIX are two Operating Systems that do not have a 1024 cylinder barrier
and therefore do not require that Greater Than 1GB Support be enabled.
•If your HDD was formatted without Greater Than 1GB Support enabled originally, you
will have to backup the data and re-FDISK the drive in order to use the maximum
capacity under DOS or any Operating System using FAT.
•Enabling the Greater than 1G support option will reassign the parameters to 512Bytes
per Sector, 63Sectors and 255Heads for SCSI disk drives with a capacity larger than 1
GByte. This allows the operation of hard drives with a capacity up to 8GByte with
operating systems such as DOS, Windows 95, etc.
•For drives smaller than 1GByte, the 64Head/32Sector translation scheme will always be
employed, regardless of this option being enabled or not.
More Than 2 Drives Support: Enabled/Disabled. When enabled, this option provides
support of up to eight devices (controlled by BIOS INT 13H), such as IDE/ESDI/ST506/
SCSI fixed disks, removable cartridges, and re-writable optical disks (MO) without the need
for device drivers under DOS 5.0 or above. This setting may be disabled under other
operating systems than DOS. Under DOS environments, the devices connected to the DC-
395 can be controlled through BIOS INT 13H or device drivers. When the option “Included
in BIOS Scan” is set to Yes, that device is controlled by BIOS INT 13H. If this option is set
to No, that device must be controlled through device drivers. The two options for More Than
2 Drive Support are as follows:
•Enabled (default)
Under DOS 5.0 or above, the ability to control up to eight devices, controlled by BIOS INT
13H is provided. Devices controlled could be IDE/ESDI/ST506/SCSI fixed disks, removable
cartridges, and re-writable optical disks (MO).
•Disabled
When this option is disabled, only the number of drives in your mainboard CMOS setup is
supported without drivers. All other devices such as fixed disks (over two), removable
cartridges, re-writable optical disks (MO), tape streamers, DATs, and CD-ROMs, would
require device drivers. When devices are under the control of BIOS INT 13H, IDE drives
always have higher priorities over SCSI drives. The following is an example describing all
the combinations:
Device Case 0 Case 1 Case 2
IDE HDD 0 none Drive C: Drive C:

3. CONFIGURING YOUR SCSI CARD
DC-395 Series User’s Manual 1717
IDE HDD 1 none None Drive D:
SCSI Device 0 Drive C: Drive D: (*)
SCSI Device 1 Drive D: (*) (*)
*Number of drives supported by CMOS (2) has been reached. Device driver must be used
for this device.
Case 0: No IDE drives. Two SCSI drives can be controlled with BIOS INT 13H.
Case 1: One IDE drive is installed as drive C:. One SCSI drive can be controlled
through BIOS INT 13H.
Case 2: Two IDE drives are installed as C: and D:. Since the maximum number of
drives supported by the CMOS (2) has been reached, no more SCSI device
can be controlled by BIOS INT 13H.
Removable media as BIOS device: Disabled/Boot drive only/All devices.
A BIOS device here is a device that can be controlled via BIOS INT 13H, meaning that it
does not need a device driver and can be bootable. However, when used as a BIOS device,
the full removability of removable media devices is not preserved. The following constraints
apply:
a) The Device can only work as a fixed disk, i.e. media change is not allowed.
b) The Media must be inserted before the system boots-up.
c) Only media with 512 Bytes/sector is supported.
Disabled If this option is disabled, the removable media devices will not be used as
BIOS devices.
Boot drive
only (default) This setting allows only the removable media installed as Drive C: to work as a BIOS device, thereby allowing it to boot. As stated above, this
device would function as a hard drive, not a removable. However,
installing the provided device driver on this bootable drive would enable
full removability for other removable media devices installed.
All Disks Enables all removable disk drives to work as BIOS devices. Enable More
than 2 drives support if necessary.
Note1: Generally, unless a Removable device is to be used as a boot drive, this setting
should be kept at its default, and the driver TRMDISK.SYS should be used to
control removable devices.
Note2: For a removable media device to boot properly, you’ll have to use DOS FDISK
partitioning utility and FORMAT it under DOS with the /S switch. Win95’s
FORMAT will treat the removable media as a Super Floppy, i.e., with no partition
table, and thus the disk will not be bootable.

3. CONFIGURING YOUR SCSI CARD
DC-395 Series User’s Manual
1818
Immediate return on SEEK command: Disabled(default)/Enabled. Enable this option to
bypass the BIOS SEEK command.
Scan all LUN for devices: Disabled(default)/Enabled. Each SCSI ID can have up to eight
Logic Unit Numbers (LUN: 0-7). With this option enabled, all the LUNs for all SCSI IDs on
the SCSI bus will be scanned and recognized as BIOS Devices. If Disabled, only LUN0 of
each SCSI ID will be scanned and recognized as a BIOS device.
Active Negation: Enabled(default)/Disabled. Enable this option to enhance the noise
immunity on the SCSI bus.
Power on RESET SCSI Bus: Enabled(default)/Disabled. When enabled, the SCSI BIOS is
reset upon initialization.
Delay before BIOS scans Device: 3 - 120 seconds. The default is a 3-second delay before
the BIOS starts to scan for SCSI devices during initialization. This amount of time is enough
for most devices to get ready for proper operation. Since some older hard drives may need
more time to spin up, you may need to extend the delay for those devices.
Max number of tagged commands: 2/4/8/16/32 (default). The setting of this option depends
largely on your application software. In general, a larger number of tagged commands results
in better random disk access performance.
Parity Checking: Yes/No. This option defaults to enabled, i.e., Yes. If set to No, the DC-395
won’t perform parity checking. For devices that do not implement the parity function, you
should disable this option.
F2 or F6 Function During Bootup: Disabled/Enabled (default). This setting determines
whether or not the user can access the DC-395’s BIOS via the F2 or F6 keys during system
boot. When disabled, the option to enter the PCU will not be displayed, in which case the
only way to configure the DC-395’s settings will be to run the UTIL.EXE program in the
\DOS directory on the driver diskette. You may want to disable this setting to prevent users
from using potentially damaging functions such as the low-level format.

3. CONFIGURING YOUR SCSI CARD
DC-395 Series User’s Manual 1919
3.2.3 Set Devices Options
This sub-menu allows you to change options for each device on the SCSI bus. Device
information related to each SCSI ID is displayed in the lower portion of the screen.
DC-395U/395UW/395F: MaxSyncXferRate replaced with MaxSyncXfers. Wide Negotiation
added:
SCSI ID #0 #1 #2 #3 #4 #5 #6 #7
Allow Disconnection No Yes Yes Yes Yes Yes Yes Yes
Send START UNIT Command No No No No No No No No
Tagged Command Queuing Yes Yes Yes Yes Yes Yes Yes Yes
Wide Negotiation Yes Yes Yes Yes Yes Yes Yes Yes
Synchronous Negotiation Yes Yes Yes Yes Yes Yes Yes Yes
Max Sync Xfers 20.0 20.0 20.0 20.0 20.0 20.0 20.0 20.0
Included in BIOS Scan Yes Yes Yes Yes Yes Yes Yes Yes
SCSI ID Model Device Type Capacity
0
SEAGATE
ST31230W
Fixed disk 1010 M
1
FUJITSU
M2513A
Optical disk 604 M
2
SONY
CD-R CDU924S
CD-ROM 121 M
3
NEC
CD-ROM DRIVE:462
CD-ROM
4
IOMEGA
ZIP 100
Removable disk 95 M
5
6
WANGTEK
5525ES SCSI M74H
Tape drive
7
*For DC-395UW: Press <Tab> to see the next screen for SCSI ID 8-15, if available.
*For DC-395U: "Wide Negotiation" is always set to “No” and cannot be changed.
Allow Disconnection: Yes/No. Yes is the default option and allows a SCSI device to go off-
line, thereby freeing the SCSI bus when performing multi-tasking operations. In this way, the
DC-395 can simultaneously process multiple operations on the SCSI bus and thus improve
efficiency in a multiple device environment.
Send START UNIT Command: Yes/No (default). Some specific drives require additional
spin-up commands to start their motors during system initialization. These devices would
require that this setting be set to Yes. However, most drives will spin up their motors
automatically during power up, and would not require the START UNIT Command. Some
drives have a jumper to enable/disable this option.

3. CONFIGURING YOUR SCSI CARD
DC-395 Series User’s Manual
2020
Note:Enabling this feature would reduce the load on your computer's power supply by
allowing the DC-395 to turn on SCSI devices one at a time during system
initialization, starting from the lowest SCSI ID. However, each device would be
required to support this option.
Tagged Command Queuing: Yes/No (default). The Yes option is useful for enhancing
overall system performance under multi-tasking operating systems such as OS/2, Windows
NT and Unix.
Wide Negotiation: Yes/No. This option is ignored when the DC-395U, a non-Wide SCSI
adapter, is installed. It is suggested that you enable this option, i.e., Yes, for 16-bit Wide
SCSI devices in order to gain the best performance and that you disable it for 8-bit devices
for less compatibility problems.
Synchronous Negotiation: Yes/No. Yes (default) is for Active Synchronous Negotiation. In
this mode the DC-395 series adapter will initiate SCSI synchronous negotiation when the
system boots up. NO, Asynchronous Negotiation mode, is normally at a lower rate and not
related to timing.
MAX Sync Xfer Rate : 20.0 - 40.0 MB/sec. . The DC-395’s will negotiate an optimum
speed depending on the transfer rate of each device under the chosen option.
MAX Sync Xfers (for DC-395U/395UW):
Model # SCSI
width Byte/Xfer Max Sync Xfer (MXfer/sec)
DC-395U 8-bit 120
DC-395UW 16-bit 240
Included In BIOS Scan: Yes (default)/No. When set to Yes, the DC-395’s BIOS will scan
and display the device’s information during system bootup. HDD scanned by the BIOS will
be controlled by BIOS INT 13H (See More Than 2 Drives Support). When set to No, the DC-
395’s will not scan the device and device drivers will be needed to control it.
You may set this option to No for SCSI ID(s) without device(s) connected to speed up the
device scanning during boot. But, beware that any connected device will not be scanned and
recognized by the BIOS when this option is set to No. So, if any connected devices are not
presented in DC-395’s BIOS display message during bootup, check this option first.