Converting From Fc/Iscsi To Iscsi; Same Host Protocol And Mirroring Operations; Change Host Protocol; Determine Whether You Have Dual-Protocol Sfps - Lenovo ThinkSystem DE Series Hardware Installation And Maintenance Manual

Converting from FC/iSCSI to iSCSI

• Synchronous Mirroring is not supported for iSCSI.
• If you plan to convert the ports that are being used for mirrored relationships, you must deactivate
mirroring relationships before applying the feature pack.
Attention: Possible data loss – If you do not delete the mirroring relationships that occurred over FC
before converting the ports to iSCSI, the controllers might lock down, and you might lose data.
• If you do not plan to convert the ports that are being used for mirroring, 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.

Same host protocol and mirroring operations

Mirroring operations are not affected if the host ports being used for mirroring keep the same protocol after
you apply the feature pack.
Even so, 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. Refer to the online help for ThinkSystem System Manager if you have questions on
how to do this.

Change host protocol

If you have a DE Series storage array with SFP+ (optical) host ports, you can change the host port protocol
from Fibre Channel (FC) to iSCSI or from iSCSI to FC. You can change the protocol used by the host ports
built into the controller (baseboard host ports), the protocol used by the host ports on the host interface card
(HIC ports), or the protocol of all host ports.

Determine whether you have dual-protocol SFPs

Use ThinkSystem System Manager to determine what type of SFP transceivers you have. Because these
SFPs can be used with both FC and iSCSI protocols, they are referred to as dual-protocol or unified SFPs.
Step 1. From ThinkSystem System Manager, select Support.
Step 2. Select the Support Center tile.
Step 3. On the Support Resources tab, locate and select the Storage Array Profile link.
Step 4. Type SFP in the text box, and click Find.
Step 5. For each SFP listed in the Storage Array Profile, locate the entry for Supported data rate(s).
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Chapter 3 Hardware replacement procedures
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