Grass Valley K2 Storage System Instruction Manual v.3.2 Sep.24 2007 - Manual (Page 74)

74 K2 Storage System Instruction Manual September 7, 2007
Chapter 3 Installing the Level 2R Storage System
Level 2R system description
The Level 2 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 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 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 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 Media
POWER SERVICE K2 RAID STORAGE !
POWER SERVICE K2 RAID STORAGE !
! ! !
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