Powering off the 5U expansion enclosure

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Before you power down a 5U expansion enclosure, review the following procedure.

Before you begin

Attention: To avoid potential equipment damage during transport and subsequent loss of data, see Procedure: Transporting a 5U 92-drive expansion enclosure. The procedure describes what to do for the following situations.
  • When you are powering off a 92F, 92G, or an A9F 5U expansion enclosure because you intend to transport it to another location
  • When you intend to move a rack that contains a 92F, 92G, or an A9F 5U expansion enclosure
The procedure describes how to remove each drive from the 5U enclosure and transport the enclosure. Removing the drives prevents damage to the drives and makes the lighter enclosure easier to move.

When you power off an expansion enclosure, the drives in that enclosure are no longer available to the control enclosure. The SAS chain also breaks. Any expansion enclosures that are beyond the enclosure that is powered down are also disconnected from the control enclosure.

Before you power off an enclosure, use the management GUI to show the volumes that depend on that enclosure. In the system view, select the expansion enclosure to be powered off. Then, select Dependent Volumes. If no configuration changes are made, other volumes remain available to the system.

Procedure

  1. Stop all I/O to the system from hosts that access the expansion enclosure.
  2. Unmount any associated file systems.
  3. Wait 5 minutes for all write data to be flushed to the drives.
  4. Unplug both of the power cords from the rear of the expansion enclosure to remove all power from the enclosure.