SGI InfiniteStorage 4000 Series Guia do Utilizador descarregar pdf (Página 36)

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2: Storage Enclosures

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 2-5).

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 or 4 host ports per controller (a 3992 controller supports two ports and

a 3994 controller supports four ports)

• 256 MB of cache memory with 7-day battery backup or 1 GB of cache memory with

3-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 2-5):

• 2 or 4 Fibre Channel host ports (depending on the controller installed) with small

form-factor pluggable transceivers (SFPs)

• 2 Ethernet host ports: the first is configured for out-of-band management, the other

is reserved for optional network reporting of technical problems with the array

• 1 Fibre Channel drive expansion port

• 1 RS-232 diagnostic port

The RAID controller has the following LED indicators:

• Host 1 link and speed LEDs

• Host 2 link and speed LEDs

• Host 3 and 4 link and speed LEDs (when using 3994 controllers)

• Battery charging/charged LED

• Cache active LED

•Fault LED

• Expansion loop LED

• Expansion loop bypass LED

For more information about these LEDs, see “Checking the Indicator Lights” on page 32.

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SGI InfiniteStorage 4000 Series Guia do Utilizador Página 36