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Memory and Performance
S e n d d o c u m e n t c o m m e n t s t o u c s - d o c f e e d b a c k @ c i s c o . c o m
Memory Mirroring and RAS
The Intel CPUs within the blade server support memory mirroring only when no more than two channels
are populated with DIMMs. If three channels are populated with DIMMs, memory mirroring is
automatically disabled. Furthermore, if memory mirroring is used, DRAM size is reduced by 50% for
reasons of reliability.
If this RAS (Reliability, Availability, and Serviceability) option is required, Memory RAS Config should
be set to 'Mirroring' and channel 3 must not be populated. Other RAS features (such as ECC) are not
related to the status of the third memory channel.
Removing or Installing an Adapter Card
The Cisco UCS B250 blade server can accept up to two dual-port adapter card connections for up to 40
Gbps of redundant I/O throughput. The network adapters and interface cards all have a shared
installation process.
Table 8
Cisco Product ID
N20-AI0002
N20-AQ0002 or
N20-AE0002
N20-AC0002
N20-AB0002
N20-AI0102
N20-AQ0102
N20-AE0102
1. Requires UCS Manager 1.3(1) or later.
Table 9
Cisco Product ID
N20-AI0002
N20-AQ0002 or
N20-AE0002
N20-AB0002
N20-AI0102
N20-AQ0102
N20-AE0102
N20-AC0002
UCS-VIC-M82-8P
1. Requires UCS Manager 1.3(1) or later.
2. Requires UCS Manager 2.0(2) or later.
Cisco UCS B250 Extended Memory Blade Server Installation and Service Note
30
Table 8
and
Table 9
show the available options:
M1 Model Adapter Card Options
Name
Cisco UCS 82598KR-CI 10 Gb Ethernet Adapter
Cisco UCS M71KR-E/Q Converged Network Adapter
Cisco UCS M81KR Virtual Interface Card
Cisco UCS NIC M51KR-B Broadcom BCM57711 Network Adapter
Cisco UCS CNA M61KR-I Intel Converged Network Adapter
Cisco UCS CNA M72KR-Q QLogic Converged Network Adapter
Cisco UCS CNA M72KR-E Emulex Converged Network Adapter
M2 Model Adapter Card Options
Name
Cisco UCS 82598KR-CI 10 Gb Ethernet Adapter
Cisco UCS M71KR-E/Q Converged Network Adapter
Cisco UCS NIC M51KR-B Broadcom BCM57711 Network Adapter
Cisco UCS CNA M61KR-I Intel Converged Network Adapter
Cisco UCS CNA M72KR-Q QLogic Converged Network Adapter
Cisco UCS CNA M72KR-E Emulex Converged Network Adapter
Cisco UCS M81KR Virtual Interface Card
Cisco UCS Virtual Interface Card 1280
1
1
2
1
1
1
1
1
1
OL-22474-03
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