StorageTek SL150 Modular Tape Library
 

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Goal

Solution

References

Applies to:

Goal

 SL150 How to check for robot obstructions 

Solution

Steps to follow in order to check for any obstruction in the line of movement that is not allowing the free movement of the robot:

I. Visual inspection of the library from outside.

II. Visual inspection of the library from inside.

I. Visual inspection of the library from outside

1. Remove the Robot Lock at the back of the library, turn it to the unlock position to allow the robot to move. Please note that with the 2.50 code release the SL150 will detect if the rotary robot lock is fully engaged before it will allow the power down to continue.

2. Check that the base and expansion modules are fully seated and aligned.

3. Check that the drives are fully seated and aligned.

II. Visual inspection of the library from inside.

1. Watch how the robot initializes.

This is how it should initialize:
The Robot initialization starts with its hand fully retracted. The ‘Z’ platform is then moved to the top home position. It then moves to the bottom, interrupting the Module Locate Sensor in each expansion module as it moves down. This signal is sent back to the KLC via USB from the KLE, so by the time the Robot locates the floor of the library the order of each Expansion Modules, has been determined. At the floor of the library the hand is fully checked.
After a successful initialization, the library’s contents are audited.

The FE/Customer can check for any obstruction that the robot/hand could be catching on when it is doing the tray sweep.

The best way to do this is to take the magazines out and see if there is anything that is noticeable that is hanging down that the bot/hand could be catching on.

There are two methods available, disruptive and non disruptive method.

Note: The robot may need to be allowed to drop down a little so that you can see around in the top of the base module of the SL150 library.

Disruptive method:

1. Remove any magazine using either the WEB BUI or the front operating panel, by clicking on the magazine then Unlock and manually remove it.

SL150 - How To Remove/Replace a Cartridge Magazine CRU In the StorageTek SL150 Modular Tape Library [VCAP]

2. Check magazine sensors/Locate Sensors on back of library and they were all seated okay.

3. Check vertical robot channel guide for any obstructions preventing the robot movement.

4. Check for tapes sticking too far out of the magazines.

5. Check for USB cables to be plugged in, KLEs seated, power on in all modules,the cable that connects the Z home sensor to the back of the KLM card should be checked to make sure the connections on the Z home sensor and the KLM are connected and fully seated. This should be checked on each module.

6.Check for any cables that might be in the path of the robot. If nothing is found then try to park the robot by powering down via the Web GUI and checking the "Park Robot" option.

-If that doesn't work then manually park the robot via the procedure documented in the Knowledge doc:
     SL150 - How to Remove/Replace the Robot CRU in a StorageTek SL150 Modular Tape Library:ATR:1473774.1:0 (Doc ID 1473774.1)

7.  Pull the robot out and check it for any loose cables and also for any slack in the suspension cables that the robot assembly hangs from and also check to see if the suspension cables have jumped off of the pulleys. If they have and they cannot easily be fixed then a new robot should be ordered.

- If nothing was found wrong when the robot was pulled out, put the robot back in and unlock it.  Pull all of the drives but the bridge drive so you can watch the library initialize. Power up the library and watch it initialize through the empty drive bays.

- Watch specifically to see if the robot catches on anything during the initialization. If the initialization completes OK then run the "Full Self Test" with the diagnostic tape.

Non-disruptive method:

1. Take a look at the back of the library for any unused plate covers like a plate for a unused drive location or unused power supply location.

2. Remove the plates to gain visual access to inside of the library.

3. Check the robot location and check if the robot is able to move.

4. Check for tapes sticking too far out of the magazine

5. If the robot is able to move then try to park the robot by powering down via the Web GUI and checking the "Park Robot" option. -If that doesn't work , then continue with the disruptive method.

-If that doesn't work then manually park the robot via the procedure documented in the Knowledge doc:
       SL150 - How to Remove/Replace the Robot CRU in a StorageTek SL150 Modular Tape Library:ATR:1473774.1:0 (Doc ID 1473774.1)

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