Powering on the Storage System (by Pressing the Power Button)

Prerequisites

Ensure that all devices are properly installed and device installation check is completed. Otherwise, power on them after these devices and hardware are correctly installed.

Context

• Before powering on a storage system, ensure that all expansion cables have been properly connected. If expansion cable connections are adjusted after a storage system is powered on, the storage system may malfunction.
• During the power-on, do not remove or insert optical fibers, network cables, coffer disks, or interface modules to avoid system data loss.
• When powering on a storage system, do not wear an ESD wrist strap to avoid electric shock.

The correct power-on sequence is as follows:

1. Turn on the external power switches corresponding to all the devices.
2. Press the power button on each controller enclosure.
3. Power on switches (if any switch is deployed but not powered on).
4. Power on application servers.

Procedure

1. Connect the external power supply (PDB or PDU), as shown in Figure 5-1.
   1. In scenarios where PDB is used, check labels on power cables and match power cables with power switches in the cabinet PDB.

      For example, if the label on the AC power cable connected to a controller enclosure displays PowerBox Output B_8, it indicates that the power cable of the controller enclosure corresponds to power switch SW8 on module Output B. You can turn on that power switch to power on the controller enclosure.

   2. Connect devices in the cabinet with external power supplies in the following sequence: disk enclosure, controller enclosure, switch (in the SAN network), and application server.
   Figure 5-1 Connecting external power supplies
   

2. Press the power button on each controller enclosure.
   • You only need to press the power button once. If the power indicator of the controller enclosure is blinking green, the storage system is being started. Do not hold down the power button. If the power button is held for 5 seconds, the system is powered off.
   • The power-on process takes 15 to 30 minutes.
   • After the controller enclosure is powered on, other disk enclosures connected will be automatically powered on.
   • After system power-on, the disk initialization process automatically starts. The time required for the process is dependent on the quantity of the disks to be initialized.
   Figure 5-2 Power button on 2 U controller enclosure
   
   Figure 5-3 Power button on 4 U controller enclosure
   

Follow-up Procedure

After the storage device has been powered on, verify that the indicator of each hardware component is in a normal state by referring to Checking the Running Status of the Storage Device. If you find an anomaly for any indicator, try to rectify it by referring to the Event Reference or Troubleshooting.

Power-On Sequence

Regarding the system power-on sequence, two basic rules must be followed:

• If the system includes disk bays, they must be powered on before the system bays are powered on.
• System bays must be powered on in an ascending sequence from system bay 0 to system bay n. Disk bays can be powered on in any sequence.

Devices must be grounded before the storage system is powered on. Otherwise, devices may be damaged.

The overall system power is controlled by power switches on power distribution units (PDUs). Each bay is equipped with PDUs that reside at the left and right sides in the rear of the bay. Your PDUs can be either European standard or North American standard. Choose the correct power-on sequence according to the type of PDUs configured.

Power-On Sequence for Systems Configured with European Standard PDUs

For a system configured with European standard PDUs, the correct power-on sequence is as follows:

1. Turn on PDU switches of the system bays from system bay 0 to system bay n in sequence.
   • For European standard PDU switches (single-phase, 220 V, 32 A), turn on the switches in a sequence of B1 > B2.
     Figure 5-4 PDU that meets the Single-phase AC
     
   • For European standard PDU switches (three-phase, 380 V, 32 A), turn on the switches in a sequence of A1 > A2 > B1 > B2 > C1 > C2.
     Figure 5-5 PDU that meets the three-phase AC
     
2. Press the power buttons of all controller enclosures, as shown in Figure 5-6.

   In a scenario with multiple controllers, all the controller enclosures must be powered on within three minutes. If the controller enclosures fail to power on within the specified period, the storage system fails to power on. In this case, contact Huawei technical support engineers.

   To power on the storage system, press the power button. If the power indicator of the controller enclosure is blinking green, the storage system is being powered on. Do not hold down the power button for more than five seconds; otherwise, the storage system will be powered off.

   Figure 5-6 Power button on a controller enclosure
   

Power-On Sequence for Systems Configured with High Voltage DC PDUs

For a system configured with high voltage DC PDUs, the correct power-on sequence is as follows:

1. Turn on PDU switches of the system bays from system bay 0 to system bay n in sequence.

   For HVDC PDU switches, turn on the switches in a sequence of B1 > B2.

   Figure 5-7 PDU that meets the high voltage DC
   
2. Press the power buttons of all controller enclosures, as shown in Figure 5-8.

   In a scenario with multiple controllers, all the controller enclosures must be powered on within three minutes. If the controller enclosures fail to power on within the specified period, the storage system fails to power on. In this case, contact Huawei technical support engineers.

   To power on the storage system, press the power button. If the power indicator of the controller enclosure is blinking green, the storage system is being powered on. Do not hold down the power button for more than five seconds; otherwise, the storage system will be powered off.

   Figure 5-8 Power button on a controller enclosure