3.3 Powering Off the Array and Removing It From the Rack

Use the procedures in this section when you are referred to them from the removal and replacement procedures.

To Power Off the Array

Before attempting to work inside the array enclosure, power it down as follows:

1. Shut down the J4500 array from main power as described in Chapter 2, Configuring and Powering On the Sun Storage J4500 Array.

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   Caution - When you use the Power button to enter standby power mode, power is still directed to the power supply fans, indicated when the Power/OK LED is flashing. To completely power off the array enclosure, you must disconnect the AC power cords from the back panel of the array.

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2. Disconnect both power cords from the array's power supplies.
3. Disconnect any other cables that must be disconnected in order to remove and replace a specific component.

   It is a good idea to label your cables as you disconnect them to ensure correct reconnection.

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   Caution - Before handling components, attach an electrostatic discharge (ESD) wrist strap to a grounding point on the chassis. The system's printed circuit boards and hard disk drives contain components that are extremely sensitive to static electricity.

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To Remove the Array Enclosure From the Rack

This procedure assumes you have turned off the system and removed any cables or cords that would restrict the movement of the system.

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Caution - To avoid serious personal injury and/or equipment damage while handling or moving this product, always use all four chassis handles to support the product weight. These systems can weigh up to 170 pounds (77 kg) when fully loaded with components. If only three people are available, remove power supplies, hard disks, and system controller to reduce the weight to about 50 pounds before removing the system. Leave the fan trays installed. Attempting this procedure without a mechanical lift or with fewer than four people could result in personal injury or equipment damage.

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1. If you do not have a mechanical lift, remove the following components from the rear of the rack to reduce the weight to a safe level for manual lifting:

   To remove power supplies, see To Replace a Power Supply.

   To remove the System Controller, see To Replace the System Controller Module.

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   Caution - Once components have been removed, do NOT attempt to lift the chassis at these openings, the sheet metal may deform. Use the lifting handles on the sides of the chassis (see “4” in Removing the Enclosure from the Rack).

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2. From the front of the rack, extend the rack anti-tip bar.
3. Slide out the system out to its service position by first releasing the latches on each side of the system, and then sliding it out until it reaches the stops. See the inset with arrows labeled 1 and 2 in Sliding the Enclosure Out of the Rack ).
   

   Figure 3-1 Sliding the Enclosure Out of the Rack

   
4. If you need to lighten the enclosure, open the hard disk drive access cover and remove the hard disk drives.

   See To Remove the Hard Disk Drive Access Cover.

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   Caution - Make sure you label the drives so you can replace them in their original locations. Not doing so may result in data loss.

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5. To completely remove the system from the rack, do the following:
   1. Press the green release lever (with embossed arrow) on each slide rail to disengage the system inner rails from the slide rail assembly (see the inset arrows labeled 1 and 2 in Removing the Enclosure from the Rack.
   2. Holding the handles located on each side of the system, slide the system completely out of the rack (see label 4 in Removing the Enclosure from the Rack) and set it down on a clean, stable surface.
      

      Figure 3-2 Removing the Enclosure from the Rack

      
6. To prevent the middle rails from blocking access to the aisle as you service your system out of the rack, release the middle rail locks and then slide the middle rails back inside the outer rails. See Releasing the Middle Rail Lock.
   

   Figure 3-3 Releasing the Middle Rail Lock

   

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   Note - When reinstalling the system into the rack, first pull the middle rails back out to their locking position (see Correct Setup for Inserting the System Into the Slide Rails) before attempting to reinsert the inner rails on the system into the middle and outer slide rails.

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   Figure 3-4 Correct Setup for Inserting the System Into the Slide Rails