HP LH4r HP Netserver LXr 8500 Installation Guide - Page 55

Connecting External SCSI Devices

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Chapter 4 Installing Mass Storage Devices 19. Ensure you do not damage or bend the metal EMI clips and copper grounding gasket on the front edge of the peripheral bay or the memory bay cover as you insert it. Connecting External SCSI Devices The second LVD SCSI channel B is connected directly to the external VHD (Very High Density) 68-pin SCSI connector on the rear panel. All external SCSI devices are connected to the HP NetServer using this external connector, but the external SCSI devices must provide the necessary termination at the end of the SCSI chain. If no external devices are connected, then no termination is required. The internal SCSI controller terminates channel B electrically, if no external devices are sensed at the connector. CAUTION Do not put high voltage differential (HVD) SCSI devices on the same SCSI channel as Single-Ended (SE) or Low-Voltage Differential (LVD) devices or you will damage the devices. SCSI A SCSI B IDE (CD-ROM) Flexible Disk Drive Figure 4-6. SCSI Channel A and B Connectors 47

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Chapter 4
Installing Mass Storage Devices
47
19.
Ensure you do not damage or bend the metal EMI clips and copper
grounding gasket on the front edge of the peripheral bay or the memory
bay cover as you insert it.
Connecting External SCSI Devices
The second LVD SCSI channel B is connected directly to the external VHD (Very
High Density) 68-pin SCSI connector on the rear panel. All external SCSI devices
are connected to the HP NetServer using this external connector, but the external
SCSI devices must provide the necessary termination at the end of the SCSI chain.
If no external devices are connected, then no termination is required. The internal
SCSI controller terminates channel B electrically, if no external devices are sensed
at the connector.
CAUTION
Do not put high voltage differential (HVD) SCSI devices on
the same SCSI channel as Single-Ended (SE) or Low-Voltage
Differential (LVD) devices or you will damage the devices.
IDE
(CD-ROM)
Flexible
Disk
Drive
SCSI A
SCSI B
Figure 4-6. SCSI Channel A and B Connectors