HP ProLiant DL280 ISS Technology Focus, Number 11 - Page 1
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ISS Technology Focus Number 11 In this issue: » New HP Advanced Memory Error Detection Technology » Meet the Expert- Melvin Benedict » Recent publications ISS TechComm iTunes New posts are now available on Apple iTunes, either check your iTunes page or go to ours: iTunes page. Like us: New HP Advanced Memory Error Detection Technology More than a decade ago, HP introduced the industry's first pre-failure notification system, Pre-Failure Alert, to monitor and predict potential problems with critical components such as system memory modules (DIMMs). The notification system sends an alert to a system administrator when a DIMM exceeds a predefined threshold for correctable memory errors. This lets the administrator proactively schedule server maintenance to replace a DIMM that may fail, avoiding unexpected interruption of business operations. In the past few years, memory errors have increased significantly throughout the entire industry due to the growth in overall memory demand and the increase in the number of bits per DRAM chip. This article describes why memory errors are occurring more frequently. It also describes the history of HP memory technology innovations and the new HP Advanced Memory Error Detection Technology, which addresses the growing number of memory errors. Memory errors are on the rise The growth of high-performance computing and highly virtualized IT environments is driving the demand for higher DRAM chip density and greater server memory capacity. Over the past few years, DRAM density has increased from 512 Mb per chip to 4 Gb per chip. In the last 5 years, the average memory capacity per server has grown by more than 500%-from 5.6 GB to 33 GB per server across all HP ProLiant servers. The memory capacity per application type has grown even more. Maximum server memory capacity has also increased to meet these demands. In fact, an HP ProLiant DL580 G7 server fully populated with 32 GB DIMMs contains 2 TB of system memory, which translates to 18 trillion memory cells. Because of these trends, memory errors are occurring more frequently in the industry. HP memory technology innovations The only true protection from memory errors is to use a memory error detection or correction protocol. Over the past 18 years, HP has introduced several memory technology innovations to ensure data reliability and protection: • In 1993, HP introduced Error Correction Code (ECC) to detect both single-bit and multi-bit errors. ECC can correct single-bit errors. • In 1996, HP introduced Advanced ECC technology to improve memory protection beyond standard ECC.