Lenovo ThinkSystem DE Series Manual page 136

Converting from iSCSI to FC
• Asynchronous Mirroring requires both the local storage array and the remote storage array to
use the same protocol. If you are currently using Asynchronous Mirroring with the baseboard
ports, you must deactivate Asynchronous Mirroring before changing the protocol.
• Refer to the online help for ThinkSystem System Manager to delete all mirror consistency
groups and remove all mirrored pairs from the local and remote storage arrays. In addition,
follow the instructions in the online help to deactivate Asynchronous Mirroring.
Converting from FC to FC/iSCSI (not applicable to controllers without two base-board
ports on the rear)
Mirroring considerations:
• Synchronous Mirroring is not supported for iSCSI.
• If a storage array used for mirroring currently has only FC ports, and you want to convert some
of them to iSCSI, you must determine which ports are used for mirroring.
• You do not need to convert the ports on the local storage array and the remote storage array to
the same protocol as long as both storage arrays have at least one active FC port after the
conversion.
• If you plan to convert the ports that are being used for mirrored relationships, you must
deactivate any synchronous or asynchronous mirror relationships before applying the feature
pack.
• If you plan to convert the ports that are not being used for mirroring, asynchronous mirroring
operations will be unaffected.
• Before applying the feature pack, you should confirm that all mirror consistency groups are
synchronized. After applying the feature pack, you should test the communication between the
local storage array and the remote storage array.
Data Assurance considerations:
• The Data Assurance (DA) feature is not supported for iSCSI.
To ensure that data access remains uninterrupted, you might need to remap or remove DA
volumes from host clusters before applying the feature pack.
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