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What is an ASC Network
The ASC Storage Network can be either a dedicated storage network, just like
traditional Fibre Channel SANs, or it can be embedded into the existing LAN for
small or low impact applications. Acer recommends that a separate network
segment be dedicated to the Storage Network; this flexibility allows the
building and testing of different topologies, the scaling of the Storage
Network, and the sharing of networking resources to suit the varied
requirements of different computing environment.
PC Clients
Public LAN
Database/Messaging Application Servers
Ethernet Switch for Storage Network
Altos NAS 700
Altos Storage Sub-system
ASC uses in-Band design.
In-Band is using a group of dedicated appliance boxes located between the
Storage and the Host servers to manage the storage. It uses at least 2 Ports –
One as “Target” to Hosts, and One as Initiator to Arrays. When setting up ASC
ports, Hosts are mapped to Target Ports and Arrays are mapped to Initiator
Ports.
ASC utilizes SCSI, the standard for server class storage devices. ASC supports all
types of SCSI devices, including those running the fastest Ultra 320 SCSI
specification.
SCSI is the standard for server class storage because it is fast, intelligent
(operations can occur independently of activity on the bus,) and expandable
Acer Altos® NAS 700 Solution Guide
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