Service manual

Servers are connected by a serial cable which supports the heartbeat signal required for automatic
system recovery (failover) features.
The redundant K2 RAID chassis has redundant RAID controllers to support the Fibre Channel
connections from the K2 Media Servers. The redundant K2 RAID chassis is also connected to the
GigE control network. It also must be connected to the GigE control network.
On the redundant K2 RAID chassis there is one RAID 1 RANK (also know as LUN) for media le
system metadata le and journal le that comes with one hot spare drive. The rst set of drives
consists of 3 blank slots. The remainder of the RAID storage is RAID 5 or RAID 6 for media. An
online SAN has 2.5 inch 10K drives, with 24 drives per chassis. A production SAN has 3.5 inch
7.2K drives with 12 drives per chassis.
Optional 10 Gig NH K2 Media Servers are available to provide additional FTP bandwidth. If the
optional NH server is used, all FTP trafc goes to this server, so neither K2 Media Server is cabled
or congured for FTP.
The K2Cong control point PC is connected to the GigE control network. The K2Cong application
runs on this PC for conguring the SAN. The SiteCong application also runs on this PC.
FTP/streaming trafc accesses the K2 SAN via the FTP GigE port on K2 Media Servers.
FTP/streaming trafc does not go to K2 clients.
Related Topics
Description of K2 SAN Devices
Working with Ethernet switches on page 328
Basic Nearline K2 SAN description
Control
RAID Chassis
RAID Expansion Chassis
NH K2 Media
Server
Ethernet
Switch
Fibre Channel
connection
Control
FTP
Control point PC
Control
FTP to/from online system
The purpose of a Nearline SAN is to provide a large pool of storage to which les can be saved.
The Nearline system is considered an “ofine” system, which means the system stores les only,
such GXF les or MXF les, with no ability to record or play those les directly on the system.
This is because the Nearline system has no media database to support “movies” or “clips”, such as
there is on an “online” K2 SAN. However, the les on a Nearline system can be readily available
to an online K2 system via FTP transfer.
34 K2 Installation and Service Manual 2013 07 20
Product description