Dell PowerEdge 1750 - Manual (Page 42)

If the drive has been online, the green power on/fault indicator will flash as the drive is powered down. When both drive indicators are off, the drive is
ready for removal.
4. Open the hard-drive handle to release the drive.
5. Slide the hard drive out until it is free of the drive bay.
6. Replace the optional front bezel, if one was attached. See " Replacing the Bezel ."
External SCSI Hard Drives
Follow these general guidelines when connecting external SCSI hard drives to the external SCSI connector on the system's back panel or to a SCSI controller
card.
1. Remove the optional front bezel, if present. See " Removing the Bezel ."
2. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.
3. Open the system covers. See " Opening the System Covers ."
4. If you are installing a SCSI controller card, install the card now. See " Installing an Expansion Card ."
5. Connect the external SCSI devices to the external SCSI connector on the system's back panel or to the SCSI controller card.
If you are attaching multiple external SCSI devices, daisy-chain the devices using the cables shipped with each device.
6. Close the system covers. See " Closing the System Covers ."
7. Reconnect the system to an electrical outlet and turn it on.
8. Replace the optional front bezel, if applicable. See " Replacing the Bezel ."
9. Connect the external device(s) to electrical outlet(s) and turn them on.
10. Install any required SCSI device drivers. See "Installing and Configuring SCSI Drivers" in the User's Guide.
11. Test the SCSI devices. See " Running the System Diagnostics ."
Configuring the Boot Device
If you plan to boot the system from a hard drive, the drive must be attached to the primary (or boot) controller. The device that the system boots from is
determined by the boot order specified in the System Setup program. See " Using the System Setup Program ."
Installing an External SCSI Tape Drive
This section describes how to configure and install an external SCSI tape drive with an add-in PCI controller card.
1. Remove the optional front bezel, if present. See " Removing the Bezel ."
2. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.
3. Open the system covers. See " Opening the System Covers ."
4. Ground yourself by touching an unpainted metal surface on the back of the system, unpack the drive and controller card, and configure the tape drive
according to the tape drive documentation, based on the following guidelines:
a. Each device attached to a SCSI host adapter must have a unique SCSI ID number. (Narrow SCSI devices use IDs 0 to 7; wide SCSI devices use
IDs from 0 to 15).
A SCSI tape drive is typically configured as SCSI ID 6.
b. SCSI logic requires that the two devices at opposite ends of a SCSI chain be terminated and that all devices in between be unterminated.
Therefore, you enable the tape drive's termination if it is the last device in a chain of devices (or sole device) connected to the SCSI controller.
CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. See
your System Information Guide for complete information about safety precautions, working inside the system, and protecting against
electrostatic discharge.
NOTE: The integrated SCSI controller does not support mixed mode (one channel SCSI and one channel RAID). For this reason, in a system with RAID,
Dell does not support an external tape drive connected to the external SCSI controller.
CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. See
your System Information Guide for complete information about safety precautions, working inside the system, and protecting against
electrostatic discharge.
NOTE: There is no requirement that SCSI ID numbers be assigned sequentially or that devices be attached to the cable in order by ID number.