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.
- 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 access to the data
because the storage is not accessible.
- If the storage
array participates in a mirroring relationship, stop all host I/O
operations on the secondary storage array.
- Wait for any data in cache
memory to be written to the drives.
The green Cache Active LED on the back of each controller is
on when cached data needs to be written to the drives. You
must wait for this LED to turn off.
Callout |
Type of host ports |
 |
Cache Active LED |
- From the Home page of ThinkSystem System
Manager,
select View Operations in Progress.
- Wait for all
operations to complete before continuing with the next step.