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Chapter 3 Installing External Tape Drives
Connecting a SCSI Cable
DDS-4/DAT 72 User’s Guide 41
Connecting a SCSI Cable 3
The external tape drives provide two 68-pin, shielded connectors on the
back panel (see
figure 15). You can use either connector to attach the drive
to the host computer or to another SCSI device.
The internal tape drives can be used with two SCSI interfaces:
• Wide SCSI — either Low Voltage Differential (LVD) or Single-ended
(16-bit Wide mode).
• Narrow SCSI — either Low Voltage Differential (LVD) or Single-
ended (8-bit Wide mode).
The tape drive automatically detects whether the SCSI bus is LVD or
single ended. Be sure the SCSI bus is terminated properly.
Connecting to a Wide SCSI
Connector
3
If your computer has a 68-pin wide SCSI connector:
1 Turn off your computer.
2 Connect the SCSI cable from the SCSI host adapter or from another
unterminated SCSI device to either of the two 68-pin SCSI connectors
on the back of the external tape drive (see figure 15
).
3 If desired, use the other SCSI connector on the back panel of the
external tape drive to attach another SCSI device.If the external tape
drive is the last or only device in the SCSI chain, terminate the SCSI
chain (see Checking SCSI Termination
).
Note: We strongly recommend that you attach the tape drive to SCSI
controllers that support the SCSI Ultra2 LVD interface only.
Attaching the tape drive to a non-LVD SCSI controller or an 8-
bit Narrow SCSO controller will degrade the performance of
your tape drive and backup operations. Performance will also
be degraded if you attach non-LVD SCSI devices on the same
bus cable as your LVD connection. Do not connect the tape
drive to a disk RAID controller (disk RAID controllers are not
supported). If you install an adapter, we recommend you
purchase a SCSI LVD controller kit that includes the SCSI
cable and terminator.
- ''6'$7 1
- Contents 3
- DDS-4/DAT 72 User’s Guide iv 4
- Chapter 6 Troubleshooting 58 5
- Index 66 5
- DDS-4/DAT 72 User’s Guide vi 6
- DDS-4/DAT 72 User’s Guide vii 7
- DDS-4/DAT 72 User’s Guide ix 9
- DDS-4/DAT 72 User’s Guide x 10
- Quick Start Installation 13
- Product Overview 14
- DDS-4/DAT 72 User’s Guide 2 14
- Figure 1 Drives Covered in 14
- This User’s Guide 14
- DDS-4/DAT 72 User’s Guide 3 15
- Tape Drive Components 1 16
- DDS-4/DAT 72 User’s Guide 5 17
- DDS-4/DAT 72 User’s Guide 6 18
- DDS-4/DAT 72 User’s Guide 7 19
- Chapter 2 20
- Unpacking 2 21
- What Else You Need 2 22
- Installation Summary 2 23
- DDS-4/DAT 72 User’s Guide 12 24
- Default jumper settings shown 26
- SCSI ID 2 28
- Parity Checking 2 29
- Terminator Power 2 30
- Data Compression 2 31
- Power-On Self-Test 2 32
- Host Operating System 2 33
- Host Operating System 34
- DDS-4/DAT 72 User’s Guide 22 34
- Vendor ID 2 36
- Recording Drive Information 2 36
- DDS-4/DAT 72 User’s Guide 25 37
- DDS-4/DAT 72 User’s Guide 26 38
- Tape Drive 38
- Side View 39
- Bottom View 39
- Connecting a SCSI Cable 2 41
- Checking SCSI Termination 2 42
- 2 Replace the computer cover 45
- Registering Your Tape Drive 2 46
- Installing External Tape 47
- Unpacking 3 48
- What Else You Need 3 48
- Installation Summary 3 49
- SCSI ID 3 50
- Parity Checking 3 51
- Data Compression 3 51
- Power-On Self-Test 3 52
- Host Operating System 3 52
- Connecting a SCSI Cable 3 53
- Checking SCSI Termination 3 54
- Connecting a Power Cable 3 55
- Registering Your Tape Drive 3 56
- Registering Your Tape Drive 57
- DDS-4/DAT 72 User’s Guide 45 57
- Operating Your Tape Drive 58
- Handling Cartridges 4 59
- Loading a Cartridge 4 60
- Unloading a Cartridge 4 61
- Write protected 63
- Write enabled 63
- Cleaning the Tape Heads 64
- DDS-4/DAT 72 User’s Guide 52 64
- Understanding the 65
- Drive LEDs 65
- Front Panel LEDs 66
- DDS-4/DAT 72 User’s Guide 54 66
- Figure 20 Front Panel LEDs 66
- LED Summary 5 67
- Clean LED 5 67
- Media LED 5 68
- Drive LED 5 69
- Troubleshooting 70
- Missing or Damaged Parts 6 71
- SCSI ID Problems 6 71
- SCSI Termination Problems 6 71
- Mounting Hardware Problems 6 72
- Drive Does Not Work 6 72
- Power-On Self-Test Fails 6 72
- Computer Does Not Boot 6 73
- Write Error 6 74
- Hardware Error 6 74
- Chapter 6 Troubleshooting 75
- Hardware Error 75
- DDS-4/DAT 72 User’s Guide 63 75
- Loading Revised 76
- Firmware 76
- Using Firmware Cartridges 1 77
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