Grass Valley Profile XP Service Manual - Manual (Page 27)

Profile XP system overview
23 July 2004 Profile XP Service Manual 27
Real Time subsystem
The Real Time Subsystem contains a real time processor and peripheral devices and
runs the VXWorks operating system.The Real Time Subsystem manages all the
hardware involved in controlling the flow of video, audio, and timecode in and out of
the system. This includes video I/O boards, audio I/O boards, video compression
boards, and networking and storage. The Real Time Subsystem is controlled by
applications running on the Applications Subsystem using Inter-Processor Messaging
channels (IPM). It is responsible for the execution of events on the play time line.
Media storage subsystem
NOTE: If your Profile XP Media Platform is part of an Open SAN, refer to the
Open SAN Installation Guide for information about media storage.
The Storage Subsystem is where the video, audio, timecode and other media related
data is stored. This storage system is made up of one or more external RAID level 3
storage chassis containing Fibre Channel disks. The Profile XP Real Time Subsystem
controls read/write disk operations by sending SCSI protocol commands over one or
more Fibre Channel links.