IBM 7945D2U Product Manual page 14

Leadership enterprise server with significantly lower cost of ownership in a highly available and
expandable, rack-dense, 2U dual-socket server
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keep your fingers on the pulse of your e-business.
Processors —Intel Xeon processors provide high clock rates, 4 to 6 cores, 64-bit extensions, and
advanced features for performance, availability and power management. Large cache size,
combined with fast 1333MHz, 1066MHz, or 800MHz memory access and an integrated memory
controller reduce memory latency and facilitate the movement of data. (Note: System
performance depends not only on the number of processors in the server but also on the
frequency and functionality of each processor.) Adding a second processor may be a cost-
effective way to achieve significant performance improvements.
Memory — Memory is a major factor in systems application performance. Adding more memory
to a System x server is one of the most effective ways to increase application performance. For
best performance in a server with a 4-core processor, there should be twice as much memory as
for a 2-core processor. A 6-core processor should have three times as much memory as a 2-core
processor.
Hard Disk Drives — IBM hard disk drives help you improve the transaction and cost performance
of your System x servers. The choice of hard disk drives can be a critical aspect of maximizing the
I/O throughput of the system. 2.5-inch SAS hard disk drives are available for the x3650 M3 with
capacities of 1TB at 7,200 RPMs, up to 600GB at 10K RPMs, and up to 146.8GB at 15,000
RPMs. 2.5-inch SATA HDDs are available in capacities up to 1TB at 7,200 RPMs and 300GB at
10K RPMs.
Solid State Drives — IBM solid-state drives offer high IOPS (I/O operations per second)
performance and the ultimate in reliability, with 3X the MTBF (mean time between failure) rate of
enterprise HDDs. IBM SSDs. are available in 50GB capacities. They can be used as a highly
available boot drive, for storing disk images, or for other uses that stress read performance.
Power Supply — The optional second power supply for the x3650 M3 enables redundancy for
hot-swap power. In addition, its design, up to 95%-efficient, helps lower your energy bill for power
and cooling.
Virtual Media Key — The x3650 M3 includes a plethora of systems management features built-in;
however, sometimes additional management capability is needed. In those situations, the Virtual
Media Key not only offers powerful new features, it does so without taking up a valuable PCI-X or
PCIe adapter slot, instead using a dedicated connector on the motherboard.
ServeRAID Controllers — System x servers using ServeRAID technology allow companies to
build a reliable foundation for business-critical computing. IBM ServeRAID technology allows an
array consisting of multiple physical hard disk drives to be treated as one logical drive. ServeRAID
technology also allows data to be stored redundantly, across multiple hard disk drives—enhancing
both the integrity and the availability of the data. SAS and SATA ServeRAID controllers offer
enhanced performance due to onboard processors and cache. Because IBM ServeRAID
controllers can help significantly improve data transfer rates, this technology is extremely effective
when implementing demanding, transaction-oriented applications. By employing the advanced
fault tolerance of IBM ServeRAID technology, companies can effectively implement networked
business systems that require large amounts of storage space for data and applications that must
be available for their businesses to continue operating.
The ServeRAID-BR10il v2 SAS/SATA Controller offers RAID-0/1/1E support, with up to 3Gbps
per SAS port. The IBM ServeRAID-M1015, x8 PCIe and 6Gbps, offers RAID-0/1/10; optionally
RAID-5/50 with SED support. The IBM ServeRAID-M5014, x8 PCIe and 6Gbps, provides 256MB
cache and RAID-0/1/10/5/50; optionally RAID-6/60 with SED, and battery backup. The IBM
ServeRAID-M5015, x8 PCIe and 6Gbps, includes 512MB of battery-backed cache and RAID-
0/1/10/5/50; optionally RAID-6/60 with SED. For external storage, the ServeRAID-M5025
controller provides RAID-0/1/10/5/50 support and 512MB of onboard cache and enables
connection to up to four IBM System Storage SAS/SATA expansion units (240 HDDs total). The
IBM ServeRAID M1000 Series Advance Feature Key adds RAID-5/50 and SED support to the
ServeRAID-M1015. Similarly, the IBM ServeRAID M5000 Series Advance Feature Key adds
RAID-6/60 with SED support to the M5014, M5015, and M5025. The IBM ServeRAID M5000
Series Battery Key adds battery backup support to the M5014 and CTO servers containing an
M5015 or M5025.
External Storage — The IBM System Storage EXP810 and EXP3000 expansion units, as well
as the DS3000, DS4000, and DS8000 series storage subsystems and N3000, N5000, N6000, and
N7000 NAS systems comprise a powerful and broad shared storage family with integrated
management software designed to meet midrange and enterprise needs.
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