User manual QUANTUM VIPER 200 LTO 20-08-2002

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Manual abstract: user guide QUANTUM VIPER 200 LTO20-08-2002

Detailed instructions for use are in the User's Guide.

 [. . . ] Viper 200 LTO Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . STU42001LW,  STU42001WD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . STU62001LW,  STU62001WD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . STU42001FC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  [. . . ] This way,  if one connection fails,  the other can be used to continue the data transfer. 

Fibre channel optical connector
Figure 10. Rear view of the Viper 200 FC internal drive showing fibre channel optical connectors

Connecting a Serial Interface Cable (for tape libraries) The Viper 200 drive includes an RS-422 serial interface for tape libraries. The RS422 serial interface connector is on the top of the extension on the back of the drive,  as shown in Figure 11. 

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Viper 200 LTO Product Manual

Serial Interface connector pin numbers
BA
17 15 13 11 9 7 5 3 1

18 16 14 12 10 8

6

4

2

Pin Numbers

(Pin 17 removed to prevent connector from being attached incorrectly)

Figure 11. Rear view of the Viper 200 FC internal drive showing fibre channel optical connectors

Pin and signal descriptions for the Serial Interface connector are shown in the table below. Pin 1 is used by the drive to detect the presence of a tape library. The serial interface cable must connect this pin to the adjacent pin 3. 
Pin number 1 2 3 4 5 6 7 8 9 through 18 Description Library detect (cable should connect pin 1 to pin 3) Lib TXn (output from drive,  transmit negative) GND Lib TXp (output from drive,  transmit positive) GND Lib RXn (input to drive,  receive negative) GND Lib RXp (input to drive,  receive positive) Reserved (do not use)

Connecting a power cable Attach a four-pin power cable to the power connector on the back of the drive. Figure 7 on page 23 shows the location of the power connector on Viper Fibre Channel drives. The recommended 4-pin power connector for the internal Viper 200 is an AMP 148024-0 housing with AMP 60617-1 pins or equivalent. 

Installation

27

Installing an external Viper drive
The external Viper 200 drives (STU62001LW and STU62001WD) are compact subsystems that connect to the host computer through an external SCSI port. Installing an external drive involves the three simple steps shown below:

1. Configuring an external drive
Setting the SCSI ID Make sure that the drive is turned off. Then set the SCSI ID for the drive using the push-button switch on the back of the external drive,  as shown in Figure 12. The change will take effect when you turn the drive back on. 
SCSI ID selector

68-pin wide SCSI connectors

+ ­

On/Off switch

AC Power connector

Figure 12. Back of external Viper 200 showing switches and connectors

2. Connecting the SCSI interface cable
The external Viper 200 provides two 68-pin,  shielded connectors (ANSI Alternative 2) on the rear panel of the enclosure (see Figure 12). These connectors consist of two rows of ribbon contacts spaced 2. 16 mm (0. 085 in) apart. Either connector can be used as a SCSI IN or SCSI OUT connection,  so you can use either connector to attach the drive to a host computer or to another SCSI device. Note: Turn off all power before connecting or disconnecting SCSI cables. 

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Viper 200 LTO Product Manual

SCSI termination If the Viper drive is the last device or the only device in a SCSI chain,  you must install a terminating plug on the unused SCSI connector. See Figure 13 below for two SCSI termination examples. You can purchase appropriate terminating plugs on the Internet at http://buytape. seagate. com. Termination power is enabled as a default for the external Viper 200 drive. 
External SCSI device SCSI Terminators

External Tape Drive

External Tape Drive

External SCSI device

SCSI Controller
(termination disabled)

SCSI Controller
(termination enabled)

Internal SCSI device (termination enabled)

Example 1: SCSI termination in a system that has only external SCSI devices. 

Example 2: SCSI termination in a system that has both internal and external SCSI devices. 

Figure 13. SCSI termination examples for external tape drives

3. Connecting the power cord
Attach the power cord securely to the power connector on the back of the drive (see Figure 12 on the previous page). 

Operation and maintenance

29

Operation and maintenance

4

This section describes important operational procedures for the Viper 200 drive.  [. . . ] It measures about 4 inches square and is a little more than 3/4 of an inch thick. The cartridge features a write-protect switch and built-in cartridge memory (described below). As shown in Figure 25,  there is a door near one corner of the cartridge. When the cartridge is inserted into the drive,  the drive opens this door to expose the leader pin that is attached to the beginning of the tape.  [. . . ]

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