Compaq AP550 Compaq Professional Workstation AP550 Maintenance & Service G - Page 52

Table 3-2, Installing Optional SCSI Devices, Guidelines, Comment, before, CAUTION

Get Compaq AP550 - Professional - 128 MB RAM PDF manuals and user guides
UPC - 743172976857
View all Compaq AP550 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 52 highlights

Removal and Replacement Procedures 3-19 Table 3-2 Installing Optional SCSI Devices continued Guidelines Turn on all external SCSI device before turning on the power to the workstation. All SCSI hard drives must be either internal or external, but never both. Do not mix Wide-Ultra and narrow SCSI devices on the same SCSI chain or the same controller. Do not mix Wide-Ultra2 and Ultra3 with other types of SCSI devices. If two controllers are installed, each may use SCSI devices having widths and speeds different from the other. Comment This enables the system board controller to recognize the external SCSI device. The system accommodates a combination of other external and internal SCSI devices, such as tape and CD-ROM drives. Wide-Ultra can only be mixed with Wide-Ultra SCSI devices. Narrow can only be mixed with narrow SCSI devices. Wide-Ultra2 and Ultra3 SCSI devices can only be mixed with each other and can coexist in any combination. If a 68-pin data cable is used on a controller having a 50-pin SCSI devices, use an internal cable adapter (Compaq number 199618-001) or an external cable adapter (Compaq number 270187-B21). CAUTION: Do not route cables near the intake to the power supply. Cables routed in this manner may block airflow to the power supply, causing it to overheat.

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
Removal and Replacement Procedures
3-19
Table 3-2
Installing Optional SCSI Devices
continued
Guidelines
Comment
Turn on all external SCSI device
before
turning on the
power to the workstation.
This enables the system board controller to recognize
the external SCSI device.
All SCSI hard drives must be either internal or
external, but never both.
The system accommodates a combination of other
external and internal SCSI devices, such as tape and
CD-ROM drives.
Do not mix Wide-Ultra and narrow SCSI devices on
the same SCSI chain or the same controller.
Wide-Ultra can only be mixed with Wide-Ultra SCSI
devices. Narrow can only be mixed with narrow SCSI
devices.
Do not mix Wide-Ultra2 and Ultra3 with other types of
SCSI devices.
Wide-Ultra2 and Ultra3 SCSI devices can only be
mixed with each other and can coexist in any
combination.
If two controllers are installed, each may use SCSI
devices having widths and speeds different from the
other.
If a 68-pin data cable is used on a controller having a
50-pin SCSI devices, use an internal cable adapter
(Compaq number 199618-001) or an external cable
adapter (Compaq number 270187-B21).
CAUTION:
Do not route cables near the intake to the power supply. Cables routed in this
manner may block airflow to the power supply, causing it to overheat.