User Guide

User Guide
Troubleshooting: Dell PowerVault 110T LTO Drive User's Guide

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Troubleshooting: Dell™ PowerVault™ 110T LTO Tape Drive User's Guide

General GuidelinesProblems with the Host ComputerProblems with the Drive and CartridgeInterpreting the LEDsReinstalling the Tape Backup SoftwareReinstalling Drivers for Windows NT and Windows 2000Tape Backup Software Errors


General Guidelines

If you experience problems when using the tape drive, you need to isolate the cause of the problem. For example, if you have just installed a new SCSI host bus adapter and your system will not start, the cause of the problem is likely to be the adapter.

When installing multiple items of hardware and software, we recommend that you install each in turn and restart the system each time. Similarly if you have already installed multiple devices and software and you experience problems, remove or uninstall each in turn to establish which one is causing the problem.

Remember that the system recognizes devices during boot-up. If you swap or connect a product when your system is running, you will need to reboot the system. Rebooting the system will reset devices and will often resolve problems. It is good practice to reboot every time you add a driver or install firmware.

The first step in problem-solving is establishing whether the problem lies with the cartridge, the drive, the host computer and its connections, or with the way the system is being operated. If none of the following advice helps you solve the problem, call for assistance.


Problems with the Host Computer

Most modern SCSI host bus adapters (HBA) locate and display attached devices when the system is booting up. If the device is not detected at this stage, there is probably a problem with the physical hardware: cables, termination, connections, power or the HBA itself.

If your drive is found on system boot up but cannot be found in the operating system, this is more likely to be a software problem.

Computer does not boot up

Possible cause Potential solution
You have connected the tape drive to an existing SCSI bus that has other devices connected to it and the SCSI address of your DELL PowerVault 110T LTO drive is identical to the address used by another device. Make sure that each device on the SCSI bus has a unique ID. We recommend that the DELL PowerVault 110T LTO drive is connected to a dedicated host bus adapter. Do not connect the drive to a disk RAID controller as this is not supported.
You have installed an additional SCSI host bus adapter and its resources are clashing with an existing adapter. Remove the new host bus adapter and check the server documentation
You have disconnected the power or SCSI cable from the computer�s boot disk during the drive installation process. Check that the cables to all devices are firmly connected.

Computer boots, but does not recognize the tape drive

Possible cause Potential solution
The power or SCSI cable is not connected properly. Check that the cables to the tape drive are firmly connected. Ensure that the SCSI cable is LVDS-compliant and that it does not have any bent pins. Replace, if necessary.
The SCSI bus is not terminated correctly. Remove the new host bus adapter and check the server documentation
The tape drive�s SCSI ID address is not unique. Check that the cables to all devices are firmly connected.
External drives only: the tape drive may have been switched on after the computer was booted up. The computer checks for SCSI devices only at power-on. Switch on the tape drive, then switch the computer off and then on again.

 


Problems with the Drive and Cartridge

During system start-up, the computer accesses the tape drive and retensions any tape cartridge in the drive to prepare the drive for operation. The noise and vibration associated with this activity are normal for this technology and do not indicate a problem with the drive.

Tape Drive Does Not Power Up

Possible cause Potential solution
The power cable is not connected properly.

Check that the cables to the tape drive are firmly connected.

Make sure that the power cable is firmly connected.

  • For internal drives, try another power connector.
  • For external drives, the power on/off switch incorporates a green LED. If this is not on, check the power cable connection and replace the cable if necessary. You can use the power cable from your monitor or another device to check that the connection is working.

If the power supply is present and all LEDs remain off, call for assistance.

The self-test fails (Ready light is off and the other LEDs are on solidly). If there is a cartridge in the drive, remove it. Power down the drive and power it up again. If the self-test still fails, call for assistance.

The Application Does Not Recognize the Tape Drive

Possible cause Potential solution
The application does not support the tape drive.

Check the application's documentation for details of drives supported. Load any service packs as necessary.

Some applications require drivers to be loaded. Check that the correct SCSI and tape drive drivers are installed. Consult the backup application�s installation notes for details.

 


Interpreting the LEDs

The DELL PowerVault 110T LTO drive has four LEDs (light emitting diodes) on the front panel which indicate drive status (see Figure 1). The power switch is also illuminated when power is switched on.

The tape drive performs a power on self-test whenever power is applied or the drive is reset. The test takes about 2 seconds. The green 'Ready' light and the three orange lights for the other LEDs flash briefly and then go out. The green 'Ready' LED flashes and then remains on if self-test passes. If it fails, all the front panel LEDs will remain off.

Figure 1: Tape Drive LEDs

Use the following table to interpret the LED sequences and the appropriate action to take.

Symptom Action
Drive fails to execute power-on self-test. LEDs remain off.

Check power is being supplied to the drive.

For external drives, the power on/off switch incorporates a green LED. If this is not on, check the power cable connection and replace the cable if necessary. You can use the power cable from your monitor or another device to check that the connection is working.

For internal drives try another power connector.

If the power supply is present and all LEDs remain off, call for assistance.

 

The 'Use Cleaning Tape' LED is flashing

The drive requires cleaning. Load a Dell approved cleaning cartridge.

 

The 'Drive Error' LED is flashing

The drive mechanism has detected an error. Power cycle or reset the drive.

If the condition clears load a new tape. If the 'Drive Error' LED remains on, call for assistance.

 

The 'Tape Error' LED is flashing

Make sure the tape cartridge is not write-protected.

Unload the tape cartridge. Insert a different tape cartridge, preferably a new one.

If the 'Tape Error' LED is now off, discard the 'suspect' tape cartridge.

If it is still on, call for assistance.

 

The 'Tape Error' and 'Drive Error' LEDs are both flashing

Unload the tape cartridge. Power cycle or reset the drive.

If the condition clears, load a new tape and discard the 'suspect' tape cartridge.

If the error condition reappears, call for assistance.

 

The tape is ejected immediately and the 'Tape Error' LED is flashing,or the 'Drive Error' LED flashes on unloading tape

The tape cartridge memory (CM) may be faulty. Write-protect the cartridge by sliding the red switch on the tape cartridge. The tape can be loaded and the data read. Once the data is recovered, the cartridge must be discarded.

 

The cleaning cartridge is ejected immediately after loading Make sure that you are using a Dell approved cleaning cartridge.

 


Reinstalling the Tape Backup Software

Refer to the Operating Guide supplied with your tape backup application for full details of how to reinstall this software should that be necessary.


Reinstalling Drivers for Windows NT and Windows 2000

Click here for details on installing drivers for a tape drive on a Windows NT or Windows 2000 operating system.


Tape Backup Software Errors

Refer to the Operating Guide supplied with your tape backup application for full details of how to troubleshoot backup application software errors


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