Chapter 3. Cabling for the DLT Drive Box

The internally mounted DLT drive used with Origin2000 products always mounts in the rackmount or deskside (tower) Origin Vault drive enclosure. In Origin200 products, the DLT drive mounts in the removable media bay. This chapter tells you how to cable your deskside or rackmount Origin Vault after the DLT drive is installed. It includes instructions on

To set up your system's DLT drive as a network resource, refer to IRIX Admin: Peripheral Devices and the IRIX NetWorker guides (IRIX NetWorker Administrator's Guide and NetWorker for IRIX User's Guide). If you need help with basic troubleshooting or maintenance procedures, go to Chapter 5, “DLT Drive Operation and Troubleshooting.”

Connecting the Drive to the Host System

The Origin Vault drive enclosure ships with two SCSI cables:

  • The first supports the 3.5-inch hard disk drive backplane and any installed drives.

  • The second supports the 5.25-inch full-height removable media bay.

The DLT drive kit is shipped with the presumption that the original cable is available and can be connected to a single-ended SCSI connector.

Note: If there is no cable available for connecting the 5.25-inch bay, you can obtain one from Silicon Graphics. North American customers can call 1-800-800-7441. International customers should contact their local Silicon Graphics support office.

Before you cable the Origin Vault enclosure, note the following:

  • For rackmount applications, the host to which you are cabling the Origin Vault enclosure should be in the same rack as the DLT drive.

  • Make sure the SCSI channel from the host system is single-ended.

  • Don't restart the vault's power until all the cables are in place.

Caution: If you connect a differential SCSI cable to a single-ended expansion option (such as the internal-mount DLT), the entire differential bus will shut down. If you connect a single-ended SCSI cable to a differential expansion option, none of the drives on the bus will work.

By default, the Origin2000 host system SCSI connector on the BaseIO board is single ended. Ultra SCSI XIO board output channels 1, 2, and 3 are always differential; channel 0 on the SCSI XIO board is auto-sensing to work with either differential or single-ended SCSI devices.

Rackmount Cabling

Note that the 5.25-inch drive bay and the 3.5-inch drives are on separate SCSI buses in the Origin Vault.

Figure 3-1 shows the SCSI connectors on the rackmounted enclosure rear panel.

Figure 3-1. Origin Vault Rackmounted Enclosure Rear View

If the vault does not have its power and SCSI cables connected, follow these steps:

  1. Connect the Origin Vault power cord to the rack's power distribution unit (PDU); see the example in Figure 3-2.

  2. Cable the SCSI connection to the SCSI port on the module's BaseIO board; you can also cable it to a single-ended SCSI port on an option board, such as channel 0 on the optional Ultra SCSI XIO board or (PCI option PCI-SCSI-Q-SE-1P).

If the Origin Vault enclosure is interfacing with the Ultra SCSI option board, you cable the Origin Vault SCSI port to SCSI connector 0 on the Y cable supplied with the XIO Ultra SCSI board option.

Figure 3-2. Connecting the Rackmount Power Cable

Figure 3-3. Connecting the Rackmount SCSI Cable to an Origin2000 Host

Figure 3-4 shows cabling to a PCI option board (PCI-SCSI-Q-SE-1P) in an Origin200 deskside tower.

Figure 3-4. Connecting Rackmount Origin Vault to an Origin200 Host

Cabling an Origin Vault Standalone Tower

To cable the standalone tower, follow these steps:

  1. Confirm the power cable and SCSI cable(s) included with the Origin Vault are plugged in properly.

  2. Locate the 5.25-inch drive SCSI connector on the tower (see Figure 3-5). You must have a SCSI connection to the lower (5.25-inch drive) SCSI port from the host system.

    Figure 3-5. Origin Vault Standalone Tower Rear View

    Caution: Make sure the SCSI connector on the host system matches the type (single ended) needed for the DLT drive. If you cable a differential SCSI connector to a single-ended expansion option, the entire differential bus shuts down.

By default, the Origin2000 or Onyx2 host system SCSI connector (on the BaseIO) is always single-ended. The optional XIO Ultra SCSI board's channels 1, 2, and 3 are differential; channel 0 auto-selects for differential or single-ended devices.

  1. Cable the SCSI connection by plugging the 1-meter SCSI cable into the Origin Vault's 5.25-inch drive bay controller port. You can also order and use the optional 2-meter cable (P/N 018-0546-401), marketing code X-S-2M.

  2. Attach the other end of the SCSI cable to the host system's single-ended SCSI connector (see Figure 3-6 for an example). You may also make the connection to channel 0 on the Ultra SCSI XIO board or PCI option board (PCI-SCSI-Q-SE-1P).

    Note: No additional SCSI devices should be daisy-chained with a vault-mounted DLT drive, or performance can be adversely affected.

  3. Power on the host system and its console or monitor.

Caution: Never connect the DLT drive to a host system with any cable combination that exceeds 19.6 feet (6 m), including any internal cable length. Doing so may result in SCSI bus errors or data loss.

Figure 3-6. Origin Vault and Origin2000 Host

Using the Power-On Self-Test

The power-on self-test (POST) starts automatically at power-on. Observe the LEDs on the front panel, making sure that they light in the following order:

  1. All LEDs on the right front panel light sequentially from top to bottom as the DLT's POST begins. The LEDs remain on for a few seconds.

  2. All LEDs on the left front panel light simultaneously for about three seconds, and then turn off.

  3. The green Operate Handle, the orange Write Protected, and the yellow Use Cleaning Tape LEDs turn off. The yellow Tape in Use LED blinks as the tape drive initializes.

  4. After initialization, if no tape cartridge is loaded, the yellow Tape in Use LED turns off, the green Operate Handle LED turns on, the handle unlatches, and the beeper sounds.

Figure 3-7 shows the LEDs on the DLT 2000XT and DLT 7000 front panel. Note that LED and control button placement on the 7000 is different from that on the 2000XT.

Note: The density selection switch on the front of the DLT7000 is not used and is completely nonfunctional.

The power-on self-test takes about 15 seconds. However, the media might require more time to become ready for use.

Figure 3-7. DLT 2000XT and 7000 Front Panels

After initialization, the DLT drive is in one of the states shown in Table 3-1.

Table 3-1. DLT Drive States

Drive State

Indicator Displays and Actions

No cartridge present

Yellow Tape in Use LED turns off; green Operate Handle LED turns on.

Handle unlatches; drive beeps momentarily.

You can raise the handle and insert a cartridge.

Cartridge present, handle down

The drive loads the cartridge. The drive is ready for use.

Cartridge present, handle up (not recommended); no cartridge present, handle could be up (not recommended)

Yellow Tape in Use LED turns off; green Operate Handle LED flashes. When you lower the handle, the cartridge loads.

Drive detects error condition

All right panel LEDs blink repeatedly.

Try to unload the cartridge and reinitialize the drive by pressing the Unload button, or power-cycle the drive (turn the drive power off and then on again).

The right panel LEDs stop blinking and the drive attempts to reinitialize. If the self-test is successful, the LEDs remain on, and then turn off.

If the power-on self test fails, or if you want to run optional system tests, see Chapter 5.

Configuring the Host System to Recognize the DLT Drive

Depending on how many DLT drives you installed, some configuration steps may be necessary. The hinv command can confirm if your system recognizes the new DLT drive(s) installed. Chapter 5 provides a sample hinv listing.

If you installed only a DLT drive, it should be ready to use with your system. For information on backing up and restoring data using the new tape drive, see the IRIX NetWorker guides (IRIX NetWorker Administrator's Guide and NetWorker for IRIX User's Guide).

Installing the SCSI Patch

Once you have installed the DLT drive in the chassis, load the CD supplied with the tape drive. Follow information in the release notes for which patches to install for your system; install the patch(es) with the Inst utility.

Powering Off Your DLT Drive

To power off the tape drive, follow these steps:

Caution: Do not shut down the Origin Vault containing the DLT drive until you are certain that nobody is logged in and accessing files stored on the drive, or unless there is an emergency and you must turn off the system immediately.

  1. Always shut down the host system before powering off the DLT drive. This order is important to prevent potential data loss.

  2. Remove the tape cartridge from the DLT drive and turn off the power to the Origin Vault (as applicable).

  3. Turn off the power button at the front; the LED goes dark. The power button is between the 5.25-inch drive bay and the 3.5-inch drives.

  4. Press the power switch located at the rear of the enclosure (the master power switch) to shut down all power to the system.

    Facing the back of the chassis, press the “O” side of the rocker switch (see Figure 3-8). The power turns off and the drive's front LEDs go dark.

    Figure 3-8. Main Power Switch on the Origin Vault