Lenovo HS22 Betriebsanweisung PDF herunterladen (Seite 9)

Versatile, easy-to-use blade optimized for performance, energy and cooling

Please see the Legal Information section for important notices and information.

Power guidelines:

 Fewer larger DIMMs (for example 6 x 4GB DIMMs vs. 12 x 2GB DIMMs) will generally have

lower power requirements

 x8 DIMMs (x8 data width of rank) will generally draw less power than equivalently sized x4

DIMMs

Reliability guidelines:

 Using fewer, larger DIMMs (for example 6 x 4 GB DIMMs vs. 12 x 2GB DIMMs is generally

more reliable

 Xeon 5500 and 5600 series memory controllers support IBM Chipkill™ memory protection

technology with x4 DIMMs (x4 data width of rank), but not with x8 DIMMs

For increased availability, the HS22 offers two additional levels of IBM Active Memory protection:

memory mirroring and memory sparing.

Memory mirroring works much like disk mirroring. The total memory is divided into two channels.

Data is written concurrently to both channels. (The third channel is unused.) If a DIMM fails in one

of the DIMMs in the primary channel, it is instantly disabled and the mirrored (backup) memory in

the other channel becomes active (primary) until the failing DIMM is replaced. With mirroring

enabled, one-third of total memory (4 DIMMs) is available for use. (Note: Due to the double

writes to memory, performance is affected.) Mirroring is handled at the hardware level; no

operating system support is required.

In memory sparing, one of the three memory channels (Ch2) for each processor is reserved as a

spare for the other two channels (Ch0 and Ch1). This means that unlike mirroring (where one

third of the memory is reserved for redundancy and one-third is unused), with sparing only one-

third is reserved, leaving two-thirds (8 DIMMs) available as usable memory. Note: Although

DIMMs within a channel do not have to be identical, the DIMMs in each of the three channels

must be identical to the other channels regarding capacity and organization. (In other words, if

the DIMMs in Ch0 are 2GB 2Rx4 and 8GB 1Rx8, respectively (all 1.35V), then the DIMMs in Ch1

and CH2 must also be 2GB 2Rx4 and 8GB 1Rx8 (all 1.35V), in that order.)

DDR3 memory is available in 1GB, 2GB, 4GB, 8GB, and 16GB DIMMs. DIMMs are installed

individually (not in pairs).

Integrated Virtualization

All models of the x3550 M3 support a USB 2.0 Flash Key installed preloaded with VMware

vSphere Hypervisor (formerly ESXi). Rather than management through a Service Console

based on a Linux operating system, vSphere Hypervisor relies on aggregate management tools,

including VirtualCenter, the Remote Command Line interface and the introduction of CIM for

standards-based and agentless hardware monitoring.

vSphere Hypervisor includes all the performance, scalability and compatibility features of a

hypervisor installed on disk, including full VMFS support across FC SAN, iSCSI SAN, and NAS,

and 4-way VSMP. Because it runs from flash memory, it’s extremely fast and ideal for diskless

configurations. It also offers enhanced security, because it runs without an operating system-

based console and is updated/patched much like firmware.

Disk Controllers

All HS22 models include an integrated LSI 1064E SAS/SATA controller. This controller supports

up to two internal SAS or SATA HDDs or two internal solid-state drives and offers hardware

RAID-0/1 support. 256MB of optional battery-backed cache memory is available.

An optional ServeRAID-MR10ie controller (CIOv form-factor) adds RAID-5/50/6/60 support for

direct-attach BladeCenter S storage or external System Storage EXP3000 access, along with

256MB of cache memory and battery backup. For SAN storage, use the optional IBM SAS

Connectivity Card (CIOv). For iSCSI storage, use an Ethernet Expansion Card (CIOv). For

Fibre Channel SAN storage, use an optional Fibre Channel Expansion Card (CIOv).

The SAS controller provides data transfer speeds of up to 3Gbps per second

in each direction

(full-duplex) across the SAS bus, for an aggregate speed of 6Gbps. The serial design of the

SAS bus allows maximum performance to be maintained as additional drives are added.

Flexible Internal Storage

The HS22 offers a choice of internal 2.5-inch storage: up to two hot-swap SAS or SATA drives

or two hot-swap solid-state drives:

Data transfer rates depend on many factors and are often less than the maximum possible.

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