Grass Valley PRS 250 RAID Storage System - Manual (Page 12)

Chapter 1 Introduction
1-2 RAID Instructions
About the RAID Storage Chassis
This RAID Storage provides a compact, high-capacity, high-availability source of
disk storage for the Profile Professional Disk Recorder. A single RAID Storage
chassis offers a large capacity of high-availability disk storage in as many as 20 disk
modules that can individually be replaced while the system is powered up.
Two models are available, the PRS250 and the PRS250M. The PRS250M offers two
storage processors, which increase the bandwidth of the RAID chassis.
The following table lists the maximum number of RAIDs that can be connected to a
Profile Professional Disk Recorder.
Approximate storage times
a
a.
At 24 Mb/sec for MJPEG, 8 Mb/sec for MPEG, 4 audio tracks per video
Video Compression Type 10 Disk Drives 15 Disk Drive 20 Disk Drives
M-JPEG 6 hours 9 hours 12 hours
MPEG 12 hours 18 hours 24 hours
Maximum number of RAIDs per Profile system
Number Of Profile Channels Maximum Number of RAID Chassis a
a.
Requires Profile System Software V2.4. To reach maximum
capacity, connect no more than 3 RAID chassis per SCSI bus,
with no other external SCSI devices connected.
2 6
4 12