Host Port Protocol; Overview And Requirements; Host Protocol Overview; Requirements For Changing The Host Protocol - Fujitsu ETERNUS AB Series Maintaining Hardware

Host port protocol

You can convert the protocol of a host to a different protocol so that compatibility and communication can be
established.

Overview and requirements

Learn about the HB5000 baseboard host ports and the requirements you need to know about before
converting the host protocol.

Host protocol overview

You can convert the host port protocol of the baseboard host ports in the HB5000 controller shelf.
The following figure shows the HB5000 with its SFP+ (optical) baseboard host ports
two IB HIC ports.

Requirements for changing the host protocol

Learn about the requirements you need to keep in mind when changing the host port protocol.
• You have scheduled a downtime maintenance window for this procedure.
• You must stop host I/O operations when you perform the conversion, and you will not be able to access
data on the storage array until you have successfully completed the conversion.
• You are using out-of-band management. (You cannot use in-band management to complete this
procedure.)
• You have obtained the necessary hardware for the conversion. Your Fujitsu Sales Representative can help
you determine what hardware you need and help you order the correct parts.
• If you are attempting to change the baseboard host ports of your storage array, and it currently uses dual-
protocol (also referred to as unified) SFP transceivers that you purchased from Fujitsu, you do not need to
change your SFP transceivers.
• Dual-protocol SFP transceivers support both FC (at 4 Gbps, or 16 Gbps) and iSCSI (at 10 Gbps), but they do
not support 1 Gbps iSCSI. See
SFP transceivers are installed.

Considerations for changing the host protocol

The considerations for changing the host protocol depend on the starting and ending protocols of the
baseboard host ports and the HIC ports.
If you use a Mirroring feature or the Data Assurance (DA) feature, you must understand what happens to
these features when you change the host port protocol.
Determine whether you have dual-protocol SFPs
and the optional
to determine what type of
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