Silicon Graphics Total Performance 9300, User Manual

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RAID Controllers
007-4644-001 17
RAID Controllers
Each TP9300 controller enclosure contains two 2882 RAID controller modules. These
controllers slide into the same opening that the ESMs occupy on the expansion
enclosures. Each controller contains RAID logic, cache memory, a rechargeable battery
for the cache, and additional environmental monitoring circuitry. Each controller also has
two labels on its rear panel: one shows the MAC address of the controller and one shows
the battery service date (see Figure 2-4).
The RAID controllers provide the following features and capabilities:
• Support for RAID levels 0, 1, 3, and 5
• Dual-porting for failover
• Support for 2 hosts per controller (4 per controller module)
• 256 MB of cache memory with 7-day battery backup
• Array sizes up to 112 drives
• Data transfer rates up to 200 MB/s
The RAID controller has the following connectors (see Figure 2-4):
• 2 Fibre Channel host ports with small form-factor pluggable transceivers (SFPs)
• 1 Ethernet host port
• 1 Fibre Channel drive expansion port
• 1 RS-232 diagnostic port
The RAID controller has the following LED indicators (see Figure 2-4):
• Host 1 link and speed LEDs
• Host 2 link and speed LEDs
• Battery charging/charged LED
• Cache active LED
• Fault LED
• Expansion loop LED
• Expansion loop bypass LED