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SNC 6101 User’s Guide 29

Scalar Firewall Manager

Scalar Firewall Manager (SFM) is a software feature that collects all host and target information and

manages the end-to-end access control in the SAN. It allows the system administrator to control access

privileges between individual Host Bus Adapters (HBAs) and target devices connected to the SNC 6101

SCSI and Fibre Channels. The system administrator uses the ADIC Management Console to administrate

the SFM.

• SFM technology enables Storage Area Networks with multiple users to share the same connectivity

channels or pipes to access the same or different storage elements or resources. Therefore,

multiple virtual private connections can be created on the same Storage Networking infrastructure.

• SFM is completely host independent and requires no software components on the host. An optional

automatic Host Registration Service that provides periodic host status information is included. It has

no interface dependencies and supports Fibre Channel, SCSI, or any other SAN interface. It is also

independent of the storage elements and requires no change in legacy or in new storage devices.

• SFM keeps track of Fibre Channel HBAs by their unique World Wide Name (WWN). Because Fibre

Channel switches also have a WWN, SFM can see and can control access to FC switches

connected to the SNC 6101.

• SFM manages access for hosts connected through FC switches to the SNC 6101. The SNC 6101

supports up to 2048 LUNs across all of its interfaces. It has a virtual limit of how many hosts (HBAs

or Initiators) are connected to each port. The default setting allows 64 initiators per port.

Consequently, with the default setting, an SNC 6101 with its two Fibre Channel ports can support

up to 128 host connections.

• SFM creates and maintains a database in non-volatile memory to hold persistent information about

each HBA (or Initiator) and its LUN access privileges.

• When you perform a Save Configuration from the ADIC Management Console, it saves both the

persistent device map and the SFM database to a file. This allows all configuration settings to be

loaded onto another SNC 6101 in the event that the SNC 6101 needs to be replaced.

• When SFM is enabled for the first time, it takes a “snapshot” of the existing configuration. SFM

automatically assigns access between HBAs and the storage elements that they currently have

access to so that an existing configuration will not be affected. Consequently, online hosts attached

to an SNC 6101 will continue to retain their current access permissions to storage elements.

• Any HBA (or Initiator) that is added to a SAN connection at a later time will have access only to the

SNC 6101 Command and Control LUN. In this case, the system administrator must explicitly set

access privileges to the desired storage element for each host connection

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Quantum Scalar 100 Betriebsanweisung Seite 33