Configuring the Fujitsu ETERNUS to use with the SAN Volume Controller

Ensure that you use the settings that are required to use the Fujitsu ETERNUS with the SAN Volume Controller. It is important that you use the correct settings to avoid data access problems.

Use the following sequence of steps to configure the Fujitsu ETERNUS system:

Configure the SAN Volume Controller host response pattern.
Register the host world wide names (WWNs) and associate them with the host response pattern.
Setup the affinity group for SAN Volume Controller volumes or setup LUN mapping.
Create or reassign storage to the SAN Volume Controller.

For all other settings and procedures, consider the SAN Volume Controller a host. See the documentation that is provided with the Fujitsu ETERNUS system.

CA parameters

The following table lists the port settings that are required. See the documentation that is provided with your Fujitsu ETERNUS system for more information because some options are only available on certain models.

Option	Fujitsu ETERNUS default setting	SAN Volume Controller required setting
Connection Topology/FC Connection Settings	FC-AL Connection	Fabric Connection
Service Class	Class 3	Class 3
FC Transfer Rate	Auto Setting	Any
Reset Scope/Scope of LUR Actions	T_L	T_L Note: If this option is not set correctly, data corruption can occur.
Release Reservation upon Chip Reset	Enable/valid	Enable/valid
HP-UX Connection Setting	Disable	Disable
Frame Size Setting	2048	Any
Affinity/Addressing Mode	Off	Any

Host response pattern

The SAN Volume Controller requires that a new host response pattern is created. If the Host Affinity/Host Table Settings Mode is used, this host response pattern must be associated with each WWN. If the Host Affinity/Host Table Settings Mode is not used, this host response pattern must be associated with the target port.

The following table lists the settings that are required. See the documentation that is provided with your Fujitsu ETERNUS system for more information because some options are only available on certain models.

Option	Fujitsu ETERNUS default setting	SAN Volume Controller required setting
Command timeout interval	Depends on the Fujitsu ETERNUS model	Default
Response status in overload	Unit Attention	Unit Attention
Byte 0 of Inquiry response/Response to inquiry commands	Default	Default
Inquiry Standard Data NACA Function	Disable	Disable
Inquiry Standard Data Version	Depends on the Fujitsu ETERNUS model	Default
Inquiry Command Page 83/Inquiry VPD ID Type	Depends on the Fujitsu ETERNUS model	Type 01
Reservation Conflict Response to Test Unit Ready Commands	Disable/Normal Response	Enable/Conflict Response
Target Port Group Access Support	Disable	Enable
Host Specific Mode	Normal Mode	Normal Mode
Response Sense at Firmware Hot Switching	Enable	Enable
Change LUN mapping	No Report	Report
LUN Capacity Expansion	No Report	Report
Aymmetric / Symmetric Logical Unit Access	Active/Active	Active/Active
Pattern of Sense Code Conversion	No Conversion	No Conversion

Notes:

If you set Inquiry VPD ID Type option to Type 3 on E4000 or E8000 range, the MDisks go offline.
If you set the Target Port Group Access Support option to Disabled on E3000 range, a 1370 error is shown in the error log.

Host WWNs

After the SAN Volume Controller is zoned on the fabric to see the Fujitsu ETERNUS, the system might not initially appear in the list of controllers when you issue the lscontroller CLI command. This is normal and expected behavior.

See the documentation that is provided with the Fujitsu ETERNUS system to add all SAN Volume Controller WWPNs as host WWNs. The following restrictions apply:

The SAN Volume Controller WWNs must be associated with a host response pattern. The host response pattern must be defined prior to registration. If you use an incorrect or default host response pattern, you can lose access to data.
All SAN Volume Controller WWNs must be registered on all Fujitsu ETERNUS ports on the same fabric. If the WWNs are not registered, you can lose access to data.

Affinity groups/zones

Use the affinity groups/zones mode to protect the SAN Volume Controller LUs if the SAN is incorrectly configured. The affinity group mode is setup in the CA configuration. See the documentation that is provided with your Fujitsu ETERNUS system for more information about using the affinity groups/zones mode. The following restrictions apply:

Each SAN Volume Controller must have exactly one affinity group/zone.
The SAN Volume Controller affinity group/zone must be associated with all SAN Volume Controller WWNs.

LUN mapping

You can use the LUN mapping mode (also called the zone settings mode for some models) with the following restrictions:

The SAN zoning must only allow a single SAN Volume Controller access to this target port.
The host response pattern must be set in CA configuration using the required SAN Volume Controller settings.

Note: If you use the LUN mapping mode, you cannot use the host affinity mode. The host affinity mode is set to OFF.

Assigning storage to the SAN Volume Controller

Ensure that you understand all SAN Volume Controller and Fujitsu ETERNUS restrictions before you assign storage to the SAN Volume Controller. See the documentation that is provided with the Fujitsu ETERNUS system for more information.