Stop Host I/O - Fujitsu ETERNUS AB Series Maintaining Hardware

5. Enter the information required to obtain the feature pack.
• Chassis serial number
• Feature Activation Code
• Feature Enable Identifier
Important: The Premium Feature Activation web site includes a link to "Premium Feature Activation
Instructions." Do not attempt to use those instructions for this procedure.
6. Choose whether to receive the key file for the feature pack in an email or download it directly from the site.
What to do next
Go to Stop host I/O.

Stop host I/O

You must stop all I/O operations from the host before converting the protocol of the host ports. You cannot
access data on the storage array until you successfully complete the conversion.
About this task
This task applies only if you are converting a storage array that has already been in use.
Procedure
1. Ensure that no I/O operations are occurring between the storage array and all connected hosts. For
example, you can perform these steps:
• Stop all processes that involve the LUNs mapped from the storage to the hosts.
• Ensure that no applications are writing data to any LUNs mapped from the storage to the hosts.
• Unmount all file systems associated with volumes on the array.
Note: The exact steps to stop host I/O operations depend on the host operating system and the
configuration, which are beyond the scope of these instructions. If you are not sure how to stop host I/O
operations in your environment, consider shutting down the host.
Attention: Possible data loss - If you continue this procedure while I/O operations are occurring,
the host application might lose data because the storage array will not be accessible.
2. If the storage array participates in a mirroring relationship, stop all host I/O operations on the secondary
storage array.
3. Wait for any data in cache memory to be written to the drives.
| Host port protocol |
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