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Level 2r system description, Chapter 4 installing the level 2r storage system – Grass Valley K2 Storage System Instruction Manual v.3.1 User Manual

Page 96

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96

K2 Storage System Instruction Manual

September 6, 2006

Chapter 4 Installing the Level 2R Storage System

Level 2R system description

The Level two redundant (Level 2R) storage system has two Gigabit Ethernet
switches connected by Inter-Switch Links (ISLs) to support a redundant Ethernet
fabric. The storage system also has redundant K2 media servers. The media servers
are configured to have identical roles. This provides redundancy for database, file
system, iSCSI bridge, and FTP roles. One L2 RAID supports redundant Fibre
Channel connections. An Expansion chassis is optional for increased storage
capacity.

K2 Media Clients have a pair of redundant (teamed) Gigabit Ethernet ports for control
and two Gigabit Ethernet ports (A and B) for media (iSCSI). Each port of the control
team is connected to a different switch. The A media port goes to the A GigE switch
and the B media port goes to the B GigE switch. The GigE switches are configured
with V-LANs to keep the control/FTP and media (iSCSI) traffic separate.

Each K2 Media Server has two GigE connections for media, one GigE connection for
control, one GigE connection for FTP, and one Fibre Channel connection to the RAID
storage. All GigE connections on a server go to the same GigE switch. The media
server hosts iSCSI interface cards for the GigE media connections and a Fibre
Channel card for the RAID storage connection. The iSCSI interface cards provide a
bridge between GigE iSCSI and Fibre Channel SCSI. The media server also hosts
software components that allow it to function in various roles, including media file
system manager, media database server, and FTP server. Redundant K2 Media
Servers are connected by a serial cable which supports the heartbeat signal required
for automatic system recovery (failover) features.

L2R RAID chassis

L2R RAID Expansion
chassis (optional)

K2 media
servers

Multiple iSCSI clients

Gigabit Ethernet
switches

A

A

B

B

Fibre Channel
connections

Control

Control

FTP

Media

POWER

SERVICE

K2

RAID STORAGE

!

POWER

SERVICE

K2

RAID STORAGE

!

!

!

!

Media

Control

FTP

Media

Media

ISLs

Control point PC

Control

FTP/streaming

Control B

Media B

Control A

Media A

Control B

Media B

Control A

Media A

Control B

Media B

Control A

Media A

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