IBM X3850 X6, Installation And Service Manual

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PC3-12800R 1600 MHz, PC3L-12800 1600 MHz or PC3L-10600 1333 MHz Load
Reduced (LR), single-rank, dual-rank, or quad-rank, DDR3 (third-generation
double-data-rate), registered, synchronous dynamic random access memory
(SDRAM) DIMMs.
The server also supports 200 GB and 400 GB eXFlash DIMMs. You can use Flash
DIMMs to utilize unused DIMM slots to increase high performance storage
capabilities. For additional information about installing Flash DIMMs, see “Flash
DIMMs” on page 51.
v Light path diagnostics
Light path diagnostics provides LEDs to help you diagnose problems. For more
information about light path diagnostics and the LEDs, see “LCD system
information display panel” on page 28 and “Light path diagnostics LEDs
description” on page 167.
v
Memory mirroring
Memory mirroring provides a redundant copy of all code and data that are
addressable in the configured memory map. Through the microprocessor
memory controller chip set, memory mirroring replicates and stores data across
DIMMs on two or four memory channels simultaneously. If a failure occurs, the
memory controller switches from the DIMMs on the primary channel to the
DIMMs on the backup channel. To enable memory mirroring through the Setup
utility, select
System Settings → Memory → Memory Mode → Mirroring . For
information about installing DIMMs for memory mirroring, see “Memory
mirroring” on page 53 and “Installing a memory module” on page 47 for more
information.
v
Memory sparing
The server supports memory sparing. Memory sparing reserves memory
capacity for failover in the event of a DIMM failure, and the reserved capacity is
subtracted from the total available memory. Memory sparing provides less
redundancy than memory mirroring does. If a predetermined threshold of
correctable errors is reached, the contents of the failing DIMM are copied to the
spare memory, and the failing DIMM or rank is disabled. To enable memory
sparing through the Setup utility, select
System Settings
→
Memory
→
Memory
Mode
→
Sparing . For information about installing DIMMs for memory sparing,
see “Memory rank sparing” on page 54.
v Mobile access to IBM Service Information Web page
The server provides a quick reference (QR) code on the system Service Card that
you can scan with a mobile device using a QR code reader application to get
quick access to the IBM Service Information Web page. The Service Information
Web page provides additional information for parts installation and replacement
videos, and error codes for server support. For the location of the system Service
Card and QR code, see “QR Codes” on page 4.
v
Multi-core processors
The server supports up to four Intel Xeon
™
EX versions of the E7-48xx v2 or
E7-88xx v2 Series, up to fifteen-core microprocessors (depending on your
model). A base model of the server comes with one DDR3 compute book, all
other modules come with two DDR3 compute books. One microprocessor comes
in each DDR3 compute book.
v
Network support
The server comes with optional Ethernet adapters that supports dual-port 1 Gb
and 10 Gb connections and connection to a 10 Mbps, 100 Mbps, or 1000 Mbps
network. For more information, see “Configuring the Ethernet controller” on
page 146.
Chapter 1. The IBM System x3850 X6 and x3950 X6 Types 3837 and 3839 server
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