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1.4
Configuration Scenarios
requires high reliability, high request rates, high data transfers, and
medium-to-large capacity.
Note:
Having virtual drives of different RAID levels, such as RAID
0 and RAID 5, in the same drive group is not allowed. For
example, if an existing RAID 5 virtual drive is created out
of partial space in an array, the next virtual drive in the
array has to be R5 only.
There are two main scenarios in which you can use this ServeRAID
controller:
•
Low-end, internal SATA configuration: In this configuration, use
the ServeRAID controller as a high-end SATA compatible controller
that connects to several SATA disks. This type of configuration is
mostly for low-end or entry servers. Enclosure management is
provided through out-of-band I
internal SAS connectors support the SFF-8485 (SGPIO) interface.
•
Midrange, internal SAS configuration: This configuration is like the
internal SATA configuration, but with high-end disks. This type of
configuration is more suitable for low-range to midrange servers.
The following figure shows a direct-connect configuration. The Inter-IC
2
(I
C) interface communicates with peripherals. The external memory bus
provides a 32-bit memory bus, parity checking, and chip select signals
for pipelined synchronous burst static random access memory
(PSBRAM), nonvolatile static random access memory (NVSRAM), and
Flash ROM.
Configuration Scenarios
2
C bus. Side bands of both types of
1-7
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