Raid Controllers - Silicon Graphics InfiniteStorage S330 RAID User Manual

RAID Controllers

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Each SGI S330 controller enclosure can contain one or two 2822 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
• 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
RAID Controllers
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