Powering On the Array

C H A P T E R 7

This chapter describes initial tray power-on procedures in the following sections:

Before Powering On

Powering On the Storage Array

Powering Off the Array

Next Steps

Before Powering On

You should decide on a IP address method before powering on. The controllers will obtain IP addresses from DHCP if it is available on the network. If DHCP is not available, the controller tray defaults to internal static IP addresses. (See the Sun StorageTek Common Array Manager Software Installation Guide for information about configuring IP addresses on controller modules.)

For instructions on configuring IP addresses on the controllers using the serial interface, see Configuring the IP Address of the Controller Modules. For an example of how to set up the DHCP server, see Configuring a DHCP Server.

Powering On the Storage Array

Use this procedure to turn power on for all trays installed in the cabinet (FIGURE 7-1).

Note - The order in which you power up the trays is important. Be sure to power on the controller tray last in order to ensure that the disks in the drive expansion trays have enough time to spin completely before being scanned by the controllers in the controller tray.

Figure showing the power switches at the back of the controller tray.

FIGURE 7-1 Tray Power Connectors and Switches

Figure showing the tray power connectors and switches.

1. Prepare the power cables as specified in Connecting the Power Cables.

2. Turn on the cabinet circuit breakers, if applicable.

3. Press the power switches at the back of each expansion tray to the On position.

While the tray powers on, the green and amber LEDs on the front and back of the controller tray turn on and off intermittently. Depending on your configuration, it can take several minutes for the tray to power on. When the power-on sequence is complete, the LEDs are steady green.

Wait until all the disk drive indicator lights on the expansion trays are steady green before proceeding to the next step.

4. Press each power switch at the back of the controller tray to the On position.

5. Check the status of each tray.

After the power-on sequence is complete, confirm the following:

The green OK/Power LEDs on each drive in the tray are steady on.

The green OK/Power LED on the tray is steady on.

If all tray and drive OK/Power LEDs are steady green and the amber Service Required LEDs are off, the power-on sequence is complete and no faults have been detected.

Powering Off the Array

The array rarely needs to be powered off. You remove power only when you plan to physically move the storage array to another location or are adding additional trays to a controller tray.

To power off the storage array, do the following:

1. Stop all I/O from the hosts, if connected, to the storage array.

2. Wait approximately 2 minutes until all disk drive LEDs have stopped flashing.

Note - If Disk Scrubbing is enabled, the disk drive LEDs will continue to flash after the 2-minute period has elapsed. By waiting the 2-minute period, you ensure that the data residing in cache has been written to disk. The LED flash rate during disk scrubbing (slow, periodic blink) is different from the flash rate of I/O (fast, random).

After the 2-minute period, data residing in cache is written to disk and the battery mechanisms are disengaged.

3. Check the Cache Active LED on the controller (FIGURE 1-11) to determine if any outstanding cache needs to be written.

If the LED is on, there is still data that needs to be flushed and written to disk.

4. Ensure that the Cache Active LED is no longer flashing before powering off the storage array.

5. Press each power switch at the back of the controller tray to the Off position.

6. Press the power switches at the back of each drive expansion tray to the Off position.

Next Steps

After you have connected the management host and data hosts, you are ready to install the management host software as described in the Sun StorageTek Common Array Manager Software Installation Guide and the data host software as described in Chapter 8. For iSCSI, proceed to Appendix A.