Lenovo HX5 Configure-to-Order Uživatelská příručka stáhnout pdf (Strana 10)

Optimized for virtualization and database applications with maximum

memory and compute capacity in a blade

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10.

Storage Controllers

HX5 models support an optional LSI 1064E SAS/SATA controller (required for SSD support).

This controller supports up to two internal solid-state drives and offers hardware RAID-0/1/1E

support.

Drive Bays

HX5 servers contain two bays that support 1.8-inch fixed internal solid-state drives (SSDs)

totaling up to 400GB. (A two-node server with 4 processors supports up to four SSDs.) Each

individual SSD is capable of sustaining approximately 4,300 IOPS, which is more than 10X what

an enterprise 15,000 RPM 2.5-inch 146.8GB SAS HDD can achieve (420 IOPS). Thus, a server

(containing 2 SSDs) is capable of producing up to 8,600 IOPS, vs. only 840 IOPS for 2 SAS

HDDs. Likewise, a two-node HX5, with four SSDs, is capable of generating 17,200 IOPS, vs. only

about 1,680 IOPS for typical storage servers using an equal number of HDDs. Combining 4

SSDs with 2 IBM 640GB High IOPS MLC Duo Adapters in a BladeCenter PCIe Expansion Unit 4

(BPE4) produces an astonishing 408,600 IOPS for a single two-socket server (double that for a

two-node server with four 40GB High IOPS adapters.).

(Note: Because SSDs offer triple

the reliability of SAS HDDs, RAID support is less necessary.)

Supported single-blade configurations include:

• Up to 2 1.8-inch SSDs

• Plus 2 High IOPS adapters (in a BPE4)

Supported double-blade configurations include:

• Up to 4 1.8-inch SSDs

• Plus 2 High IOPS adapters (in a BPE4)

For still more storage, NAS, iSCSI SAN, or FC SAN external expansion options can be added,

using an optional controller.

High Performance/High-Availability Internal Storage

The HX5 supports up to two fixed 1.8-inch solid-state drives (SSDs) internally per blade (two

blades maximum). In addition, two IBM High IOPS SSD adapters can be used.

• SATA-based solid-state — 50, 200GB capacity (400GB maximum—1 blade; 800GB—two blades)

 High I/O Performance

– Offers up to 8X more IOPS than HDDs (67/33% read/write OLTP transaction base mix);

– Optimized for heavy mix of read and write operations, such as transaction processing, media

streaming, surveillance, file copy, logging, backup / recovery, and business Intelligence

 Lower-Cost IOPS Performance

– Yields better $/IOPS: lower capacity (GB) required to achieve higher IOPS

– Consumes less energy and produces less heat than a conventional disk drive

 Superior Uptime

– 3X the availability of mechanical disk drives

– No moving parts to fail

– Enterprise wear-leveling to extend life even further

 Full OS Support

– Supports all ServerProven OSes

Due to the statistically higher failure rates for traditional spinning media, IBM recommends the

use of the solid state drives (SSDs) as an alternative. They store data on flash memory chips,

rather than on magnetic media. Like HDDs, SSDs can be used as boot media and for random

access storage. However, SSDs offer higher thresholds of shock and vibration, and a higher

operating temperature range (between 0 and 70 degrees C). This yields a failure rate only 1/3

that of HDDs (approximately 3,000,000 hours MTBF vs. 1,000,000 hours). In addition, the IBM

50GB 1.8” Solid State Drive requires only 2W. This reduces the storage power requirement and

heat output by as much as 80%, compared to 2.5-inch HDDs. If used as a boot device, no special

device drivers are required.

High IOPS SSD PCIe Adapters

• IBM 160GB High IOPS SS Class SSD PCIe Adapter (x4 Gen 1—100K IOPS, 750MBps)

• IBM 320GB High IOPS SS Class SSD PCIe Adapter (x4 Gen 1—100K IOPS, 750MBps)

Approximately 3,000,000 hours MTBF for SSDs vs. approximately 1,000,000 hours for enterprise 3.5-inch 15K SAS HDDs.

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