Compaq Deskpro 6000 Compaq Reference Guide Deskpro 4000 and Deskpro 6000 Serie - Page 108
such as SCSI tape and CD-ROM drives., When an IDE hard drive and SCSI hard drive are both
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s Every SCSI chain or circuit must be terminated (closed) at both ends. Termination can be accomplished by using the terminating feature on the device or by using a terminated cable. 4X and 8X devices may not have terminating jumpers on the device. Termination on these devices must be achieved with terminated cable. Turn on an external SCSI device before turning on power to the computer. This enables the system board controller to recognize the external SCSI device and automatically reset. When an external SCSI device is connected to the external SCSI connector on the rear panel of the computer, that device becomes the end of the SCSI chain and must be terminated. s All SCSI hard drives must be either internal or external, but never both. However, the system accommodates a combination of other internal and external SCSI devices, such as SCSI tape and CD-ROM drives. When an IDE hard drive and SCSI hard drive are both installed, the system can boot only from the IDE hard drive. Before you can install a SCSI device, you must first verify the SCSI ID of the drive and, if necessary, set the SCSI ID to a new number. Be sure that each SCSI device on the SCSI chain has a unique SCSI ID number. Second, you must determine if the device ought to have termination enabled or disabled. Set the termination if necessary. 6-26 Upgrading the Desktop Computer