Reliabilit

yMANUAL CARTRIDGE

UNLOADSuper DLT1

PresentedBy

Quantum Technical Services

Reliability Overview

• Understand why & how tapes get stuck

• Considerations

• Tape removal

• Detached leader

• Rewinding: when and how

• How It All Fits Together

Reliability Tools

• 5lbs. Torque driver

• Driver bits: #8 Torx, #2 Phillips

• Slotted Screwdriver

• ESD ground strap

• 9Volt battery

• Finger Cots or Latex Gloves

• Tweezers

• Non-contaminating probe

• Alcohol wipes

Reliability Drive Handling

• Reduce Damage to the drive– Take proper ElectroStatic Discharge (ESD)

precautions.

– Do not handle the drive without ESD protection/grounding.

– Ensure that proper tools are used

• Reduce Contamination– Latex gloves or finger cots to prevent

contamination.

– Use alcohol wipes to clean leader

Reliability Causes Of A Stuck Tape

• Faulty unload button– Try SCSI unload/eject command

• Detached leader

• Improper or no SCSI bus termination

• Another device on the bus was powered off

• Misalignment, Post-it or other label attached

• Wrong type of cartridge inserted (rare)– DLTtape III/IIIXT or Cleaning Tape III

Reliability Troubleshoot First

• Verify that the drive or bus is properly terminated

– Termination matches bus?

• Drive has good power?– Tried other sources (if possible)?

• If other devices on the bus, are they powered on?

– Were any devices powered off on an active bus?

• SCSI device/bus reset & eject command attempted?

• Device has been powered off and on?

Reliabilit

yDRIVE DISASSEMBLY

Reliability Table Top Cover

Removal

• Ensure that power is off and/or disconnected– Take proper ESD precautions

• Tool(s) – Phillips or Torx (it may vary)

• Cover screws are located on the bottom– Generally Phillips head screws

– Rotate counterclockwise direction

• Cover slides towards the rear of drive

Reliability Bezel Removal

• Tools– You will need a flat head screwdriver

– A little patience

• Care must be used in unlatching the clips– Don’t apply too much pressure

– The clips are delicate

• Start from the bottom sides – Do the bottom clips first

– Work upwards

– Slowly pivot the bezel outward from the bottom

– It should not be necessary to depress the top clips

Reliability Chassis Cover Removal

• There are three T8 Torx screws– One screw on each side of the chassis

(excluding the front)

– 5lbs. of torque is used to fasten these screws

• After removing the screws, grab the front of the cover and pivot cover back towards the rear

– You cannot pull the chassis cover straight up.

– The rear screw retainer is not flush with the rear

Reliabilit

yCARTRIDGE REMOVAL

Reliability Inspect Drive & Tape

Leader

• Visually inspect and determine the drive’s condition

– Is there tape on the take-up reel?

– Is tape fully rewound?

– Is take-up reel leader still attached?

– What is the position of the buckling arm?

• Purpose: determine first course of action– Proceed to eject tape

– Destroy tape, rewind, attach leader, etc.

Reliability If Tape Is On Take-up

Reel

• Destroying the tape is recommended– It limits the potential for damage to the heads

– If there is resistance, explain the risk of head damage

– Reattaching a leader is less invasive to the head

– Point out the head shield for protection from the leader

• A manual tape rewind is to be used only in an emergency situation.

– There must be a critical business need

– For instance, the data on the tape is unique

Reliability Manual Tape Ejection

• Tool– Fresh 9V Battery

• Considerations– Ensure power is off and power connector is

unplugged Never apply battery to the eject motor terminals

with power on Disconnect power connector from the tape drive

- Battery life is extended when disconnected

– Tape is clear of the take-up reel or is fully rewound

– Take-up reel leader is clear of tape or attached to buckling arm

– You may need to reverse the polarity first to reset the mechanism

Reliability Manual Tape Eject

• The tape cartridge is ejected by placing the contacts of a 9V battery on the contacts of the eject motor

• You may need to retract the buckling arm to reset the eject process

Reliability Manual Tape Eject

Negative (-) contact to rear post retracts the buckling arm

Postive (+) contact to rear post engages buckling arm and tape is ejected

Reliabilit

yTAPE REWIND

MANUAL AND POWER REWIND

Reliability Rewinding

Considerations

• Caution: The tape leader splice may hang on the tape head

– Stop and release the tension

– The splice should now pass over the head

• The buckle between the tape and take-up reel leaders will hang on the head

– Stop and carefully close the head shield

– Continue rewinding the buckle past the head

Reliability Manual Rewind

Supply Motor Access Hole

T8 Driver

Base Plate

Reliability Manual Rewind

• Carefully position the drive onto one of its sides– Locate the supply motor access hole on the

drive base plate

– Insert the T8 Torx driver into the access hole – Couple with the supply motor screw

– Rotate counterclockwise (right to left)

• Stop when there is any resistance– Visually inspect the tape path

– The leader splice or buckle could be hung on the head assembly or a roller

– It the motor is frozen, return the drive to the supplier.

Reliability Power Rewind

• Carefully position the drive onto one of its sides

• The supply motor access hole is located on the base plate

• Insert the T8 Torx driver into the access hole and couple with the supply motor screw

• Ensure power tool is set to reverse (counterclockwise) and keep RPM low

Reliability Power Rewind

• Caution: Using an electric power driver will damage the tape and the drive leaders if you do not stop before reaching the end of the tape

• Visually monitor tape rewind progress

• Stop before tape is fully rewound

• Switch to T8 hand tool to complete the rewind

Reliabilit

yDETACHED LEADER

Reliability Threading The Leader

• Start at roller #4

• Keep leader low to the rollers

• Follow the roller path

• Caution: the head shield may be retracted

Reliabilit

yQuestions?