Quantum SDLT 320 Guide de l'utilisateur Page 82

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CHAPTER 6: SCSI and Controller Interface Specification SDLT 220 and SDLT 320 Design & Integration Guide
6-16 March 2004 81-81148-01
6.10 Configuring the Drive
Configure the internal drive for TERMPWR or Wide/Narrow SCSI.
6.10.1 TERMPWR
A SCSI bus must be terminated at each end of the bus. All signals not defined as
RESERVED, GROUND, or TERMPWR shall be terminated exactly once at each
end of the bus. At least one device must supply terminator power (TERMPWR).
To enable TERMPWR, install the jumper across Pins 1 and 2 (refer to Figure 6-2
on page 6-5) on the TERMPWR jumper block. Remove the jumper to disable
TERMPWR. Pins 3 and 4 on this block are reserved and require no jumpering.
6.10.2 Wide SCSI
The 8-pin Configuration Jumper Block allows you to enable or disable the wide
SCSI bus. The default setting is for the wide SCSI bus to be enabled; there is no
jumper across Pins 1 and 2 when wide SCSI is enabled (refer to Figure 6-2 on
page 6-5). To disable wide SCSI, install a jumper across Pins 1 and 2. Pins 3
through 8 are reserved and require no jumpering.
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