Before you start
This task on the system involves powering down the SPs. When all SPs are down, all
I/O services stop and hosts lose access to the system. Once one or both SPs become
available to the system, I/O services to hosts will resume.
Before performing this procedure, you should disconnect all network shares and LUNs
from each host to prevent data loss. Once the system is fully powered up, you can
reconnect the hosts to these storage resources.
Pay careful attention when installing SAS cable connectors into the system SAS
ports. Improper installation can cause damage to the chassis requiring a
complete chassis replacement. If you meet resistance when installing the cable
connector into the SAS port, ensure that you are installing the connector in the
correct orientation before continuing.
Additional resources
As part of an improvement effort, revisions of the software and hardware are
periodically released. Therefore, some functions described in this document might not
be supported by all versions of the software or hardware currently in use. The product
release notes provide the most up-to-date information on product features. Contact
your technical support professional if a product does not function properly or does not
function as described in this document.
Where to get help
Support, product, and licensing information can be obtained as follows:
Product information
For product and feature documentation or release notes, go to Unity Technical
Documentation at: www.emc.com/en-us/documentation/unity-family.htm.
Troubleshooting
For information about products, software updates, licensing, and service, go to Online
Support (registration required) at: https://Support.EMC.com. After logging in, locate
the appropriate Support by Product page.
Technical support
For technical support and service requests, go to Online Support at: https://
Support.EMC.com. After logging in, locate Create a service request. To open a
service request, you must have a valid support agreement. Contact your Sales
Representative for details about obtaining a valid support agreement or to answer any
questions about your account.
Special notice conventions used in this document
Indicates a hazardous situation which, if not avoided, will result in death or
serious injury.
Replacing a faulted 2U DPE 3
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