Adaptec 2120S - SCSI RAID Controller User manual
R
INSTALLATION
GUIDE
ADAPTEC SCSI CARD 19160
ULTRA160 SCSI CONTROLLER
ASC-19160_IG.book Page 1 Wednesday, December 1, 1999 12:47 PM
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Adaptec SCSI Card 19160
The Adaptec SCSI Card 19160 Ultra160 SCSI controller enables
you to connect up to 15 SCSI devices—such as hard disk drives,
scanners, and CD-ROM drives—to any Intel-based computer
with 32-bit PCI expansion slots.
You can connect newer LVD SCSI devices, such as Ultra160 and
Ultra2 SCSI devices, to the 68-pin internal Low Voltage
Differential/Single-Ended (LVD/SE) connector. You can also
connectSingle-Ended(SE)Fast/Ultra SCSIdevices,to the50-pin
internal and external Fast/Ultra-SE connectors.
This installation guide explains how to
•Install the Adaptec SCSI Card 19160
•Set up SCSI devices
•Connect SCSI devices
INTRODUCTION
50-pin External Fast/Ultra-SE Connector
68-pin Internal LVD/SE Connector50-pin Internal Fast/Ultra-SE Connector
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Installation Guide
Bus Segments on the Adaptec SCSI Card 19160
The Adaptec SCSI Card 19160 features Adaptec SpeedFlex™
technology. SpeedFlex technology ensures that you get the best
performance from your LVD SCSI devices by electronically
isolating the LVD/SE segment from the SE segment on the SCSI
bus. This allows the Adaptec SCSI Card 19160 to support LVD
SCSI devices at speeds up to 160 MBytes/sec on the LVD/SE seg-
ment while at the same time supporting SE Fast/Ultra SCSI
devices at speeds up to 20 MBytes/sec on the SE segment. The
following figure shows the two SCSI segments.
If you attach Wide Ultra or Ultra SCSI devices to the
connector on the LVD/SE segment, the data transfer rate for
all attached LVD SCSI devices will drop to Ultra SCSI perfor-
mance levels. However, if you attach onlyLVD SCSIdevicesto
the connector on the LVD/SE segment, data will be trans-
ferred at the maximum possible rate (80 MBytes/sec for
Ultra2 devices and 160 MBytes/sec for Ultra160 devices).
AIC-3860
AIC-7892
SE Segment LVD/SE Segment
NOTE
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Adaptec SCSI Card 19160
Dischargeanystaticelectricitybuild-upbeforehandlingtheSCSI
cardbytouchingagroundedmetalobject(like theexposedmetal
parts on the back of your computer).
After you turn off your computer and unplug the powercord,
remove the cover from the computer.
Locate an unused 32-bit PCI expansion slot and remove the
expansion slot cover. (The expansion slot must be compliant
with PCI Rev. 2.1 or higher and must support Bus Mastering.)
Save the slot cover screw for use in Step 4.
INSTALLING THE ADAPTEC SCSI CARD 19160
STEP 1
Turn OFF power to the computer and disconnect
the power cord.
WARNING
STEP 2
STEP 3
Slot Cover Screw
Expansion
Slot Cover
PCI Expansion Slots
(Typically White or Ivory)
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Installation Guide
Computersmayhave verticalorhorizontalexpansionslots.Refer
to your computer manual to locate the PCI slots. If your com-
puter is a tower model, lay it on its side tomake it easier to install
the Adaptec SCSICard 19160.
Insert the Adaptec SCSI Card 19160 into the PCI expansion slot;
pressdownfirmlyuntilthecardclicksintoplace,thenreplacethe
slot cover screw. When installed properly, the card should appear
level with the expansion slot, as shown below.
STEP 4
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Adaptec SCSI Card 19160
There are several things you may need to do to your SCSI devices
before you connect them to the Adaptec SCSI Card 19160:
•Check the SCSI IDs
•Terminate the Ends
•Mount the Devices
Since setup can vary from device to device, always refer to the
device’s documentation for specific instructions.
Beloware some guidelines for checking SCSI IDs, setting termi-
nation, and mounting devices in your computer. Refer to the
Adaptec SCSI Card 19160 User’s Reference for more information
on these topics.
Check the SCSI IDs
The Adaptec SCSI Card 19160 and each device you connect to it
must have a unique SCSI ID number ranging from0 to 15.
No two devices can have the same number.
The Adaptec SCSI Card 19160 is preset to SCSI ID 7 and should
not be changed. If your computer will boot from a SCSI hard
disk, make sure the SCSI ID of that hard disk is set to 0. (Most
SCSI hard disks are preset to SCSI ID 0 at the factory.)
The SCSI IDs for internal devices are usually set with jumpers;
SCSI IDs for external devices are usually set with a switch on the
back of the device.
Terminate the Ends of the SCSI Bus
To ensure reliable communication on the SCSI bus, the device at
the end of each cable, or the end of the cable itself,must have a
terminator installed (orenabled). Terminatorsmustbe removed,
or termination must be disabled, on devices between the ends of
each cable.
Terminating LVD (Ultra160 and Ultra2) SCSI Devices
LVD SCSI devices are automatically un-terminated. If you have
internal LVD SCSI devices, a special 68-pin internal LVD cable is
required to connect the devices. Internal LVD cables usually have
SETTING UPSCSI DEVICES
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Installation Guide
an LVD or Auto switching terminator built into the end of cable.
With this type of cable, itis not necessary to terminate individual
internal LVD SCSI devices. If your cable does not have a termina-
tor built-in, you must add a terminator to theend of the cable.
Terminating Fast/Ultra SCSI Devices
OnmostinternalFast/UltraSCSIdevices,theterminationsetting
is controlled by setting a jumper or a switch, or by physically
removing or installing a resistor module(s). If you are using an
internal SCSI cable that has a built-in terminator, you must dis-
able termination on all internal devices connected to the cable.
On most external Fast/UltraSCSI devices, termination is con-
trolled by installing or removing a terminating plug. For more
information, refer to the documentation for each SCSI device.
Mount the Devices
If you have internal SCSI devices, mount each device in an avail-
able drive bay inside your computer, as shown below. Refer to
yourcomputer and device documentation for instructions on
installing devices inside your computer.
External LVD devices arenot supported by the Adaptec
SCSI Card 19160.
NOTE
Internal SCSI Device
Mounted in Drive Bay
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Adaptec SCSI Card 19160
You can connect up to 15SCSI devices tothe Adaptec SCSI Card
19160. Before connecting devices, be sure to review Setting Up
SCSI Devices on page 5. For additional details on connecting
devices, refer to the Adaptec SCSI Card 19160 User’s Reference.
Connecting Internal LVD (Ultra160 and Ultra2) SCSI
Devices
Connect internal LVDSCSI devices to the internal LVD/SE
connector on the Adaptec SCSI Card 19160. To do this, use a
68-pin internal LVD cable like the one shown in Step 1 below.
Follow these steps to connect the devices:
Locate a 68-pin internal LVD SCSI cable, which should have
twisted wires as shown below to support LVD devices.
CONNECTING SCSI DEVICES
We recommend that you keep your LVD SCSI devices
separate from your SE (Ultra SCSI) devices. This allows LVD
SCSI devices to transfer data at their maximum speed. (See
BusSegments on the Adaptec SCSI Card 19160 on page 2.)
NOTE
STEP 1
Terminated End Nonterminated End
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Installation Guide
Plug the nonterminated end of the cable to the internal LVD/SE
connector.
PlugtheinternalLVDSCSIdevicestotheothercableconnectors,
starting with the connector at the terminated end of the cable.
STEP 2
68-pin Internal LVD
SCSI Cable
68-pin Internal LVD/SE Connector
STEP 3
Internal LVD SCSI devices come from the factory with
termination disabled and cannot be changed. Proper SCSI
bus termination is provided by the terminator at the end of
the LVD SCSI cable. See Terminate the Ends of the SCSI Bus
on page 5 for more information.
LVD (e.g., Ultra160 or
Ultra2) SCSI Devices
Built-in Terminator
on Cable
Plug First Device
to this Connector
NOTE
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