Grass Valley K2 Level 2 RAID Oct.10 2006 - Manual (Page 19)

September 8, 2006 Level 2 RAID Instruction Manual 19
Chassis
An optional second RAID controller module in the K2 Level 2 RAID, allows for
continued access to the K2 Level 2 RAID if the primary RAID controller fails.
Adding a second RAID controller to the same chassis is not intended to increase
performance, but rather to add redundancy. Refer to the K2 Storage System
Instruction Manual for detailed connection and configuration instructions.
The following figure shows the RAID Storage Chassis components. Details on each
component follow the figure.
NOTE: Every K2 Level 2 RAID chassis power supply includes a backup battery so
that if electrical power is lost, data stored in cache memory will be saved. Data store
cache is not used in the K2 Level 2 RAID, so the Battery Backup module is not used,
even though it ships as part of the power supply.
Chassis
The chassis is a sheet-metal housing that contains a passive midplane and chassis slots
for the RAID controllers or expansion adapters, disk drives, power supplies, and the
LAN card.
A RAID chassis (which houses one or two RAID controllers) has a pre-set chassis
address of 0. An expansion chassis (which houses one or two expansion adapters)
must have its chassis address set to 1. This address is set by a control on the expansion
adapter. Refer to your K2 Storage System Instruction Manual for information on
setting the chassis address switch. See also,
“Addressing requirements” on page 27 .
LAN Card
Controller 0
Chassis
Controller 1
Power Supply 1
Power Supply 0