v Physical link (phy) speed of 3 Gbps SAS supporting transfer rates of 300 MB per second
v Optimized for SAS disk configurations that use dual paths through dual expanders for
redundancy and reliability
v Adapter managed path redundancy and path switching for multiport SAS devices
v Embedded PowerPC
®
RISC Processor, hardware XOR DMA Engine, and hardware Finite Field
Multiplier (FFM) DMA Engine (for Redundant Array of Independent Disks (RAID) 6)
v Support for RAID 0 and 10 disk arrays
v RAID disk arrays supported as a boot device
v Advanced RAID features:
– Hot spares for RAID 10 disk arrays
– Background parity checking
– Background data scrubbing
– Disks that are formatted to 528 bytes per sector, providing cyclical redundancy checking
(CRC) and logically bad block checking
– Optimized skip read/write disk support for transaction workloads
Related concepts:
“SAS storage configurations”
Several SAS subsystem configurations are supported on the 8202-E4C, 8202-E4D, 8205-E6C, or 8205-E6D
system.
Related information:
Serial attached SCSI cable planning
System parts
SAS storage configurations
Several SAS subsystem configurations are supported on the 8202-E4C, 8202-E4D, 8205-E6C, or 8205-E6D
system.
The configuration that you use depends on the combination of SAS features that you have installed on
your system. The following table provides an overview of the features and related configurations.
Note: All SAS subsystem configurations for 8202-E4C, 8202-E4D, 8205-E6C, or 8205-E6D systems share
the same integrated base system board (custom card identification numbers (CCIN) 2B2C or 2B4A for the
two-socket model and 2B2D or 2B4B for the one-socket model). The physical location code for the base
system board is Un-P1.
Table 4. SAS subsystem configurations for the 8202-E4C, 8202-E4D, 8205-E6C, or 8205-E6D system
SAS
subsystem
configuration
RAID cache
enablement
card
External SAS
components SAS port cables SAS cables Limitations
SAS base
subsystem
(FC 5618)
No None None Not applicable
v Either solid-state
drives (SSDs) or
hard disk drives
(HDDs) can be
used, but the two
can never be
mixed in the
same RAID array.
v IBM i is not
supported.
SAS subsystem 5
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