HP Surestore Disk Array FC60 HP SureStore E Disk Array FC60 Service Manual (A5 - Page 164
Applying Power to the Disk Array, What happens if the disk enclosures are powered up before
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Applying Power to the Disk Array Once the hardware installation is complete, the disk array can be powered up. It is important that the proper sequence be followed when powering up the components of the disk array. To ensure proper operation, power should be applied to the disk enclosures first and then to the controller enclosure, or all components can be powered up simultaneously. This gives the disks time to spin up, ensuring that the disks are detected when the controller comes on line. Once power is applied to all components, proper operation of the disk array is verified by checking the LEDs on both the controller enclosure and disk enclosure. Note What happens if the disk enclosures are powered up before the controller enclosure? When the disk array controller enclosure is powered up, it checks for the presence of the disks in the disk enclosures. If the disk enclosures have not yet been powered on, the controller will not detect the disks. This will result in no LUNs appearing because none of the disks are visible to the controller. In this case it will be necessary to power down the disk array and power it up again in the proper sequence. To power up the disk array: Note The following procedure assumes the disk array components will be powered up individually. All disk array components can also be powered up simultaneously using a single rack power switch. 1. Open all front doors on the disk enclosures. 2. Power up each disk enclosure using the disk enclosure power switch (A in Figure 66). 164 Applying Power to the Disk Array