Compaq BL10e Drive technology overview
Compaq BL10e - HP ProLiant - 512 MB RAM Manual
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UPC - 613326445501
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Compaq BL10e manual content summary:
- Compaq BL10e | Drive technology overview - Page 1
RAID 9 Advanced controllers ...9 Solid state drives for servers...9 HP solid state drive reliability requirements 10 NAND over provisioning and wear-levelling 10 Power loss protection ...10 Value, mainstream and performance SSDs 11 SSD performance ...12 Conclusion...12 For more information...13 - Compaq BL10e | Drive technology overview - Page 2
or as boot disks for entry-level servers. HP Midline drives provide larger capacity and greater reliability than Entry drives. HP Midline drives have improved resistance to rotational and operational vibration, so they are better suited than Entry drives for use in multi-drive configurations. For - Compaq BL10e | Drive technology overview - Page 3
three classes of HP server drives. Table 1. Categories of HP server disk drives General description Use environments Entry drives (ETY) Performance and reliability intended for entry-level servers, lowest unit cost Low I/O, non-mission critical usages - Boot disk - Entry server storage Midline - Compaq BL10e | Drive technology overview - Page 4
systems often use the binary-based approximation of 230, or 1,073,741,824 bytes, per gigabyte. Thus, the operating system may report that a disk drive with 100 actual gigabytes of storage has only 93 gigabytes. Disk drive performance Several factors determine the performance of a disk drive. These - Compaq BL10e | Drive technology overview - Page 5
Increasingly sophisticated approaches become practical as the embedded processing power and memory incorporated into the drive increases. There are several approaches that can be used: buffering the data to be written to disk (write caching) queuing read operations read-ahead caching queuing - Compaq BL10e | Drive technology overview - Page 6
HP development engineers work closely with disk drive suppliers to execute a comprehensive set of approximately 50 different procedures and specifications that determine the testing and metrics that a candidate drive design must satisfy. Approximately 1000 unique hard disk drives are typically used - Compaq BL10e | Drive technology overview - Page 7
HP option kitting configuration sites. Product quality data is reviewed on a daily, weekly, and monthly basis. Interconnect technology Various interconnect technologies are used to connect one or more disk SAS and SATA interfaces for industry-standard servers 2nd Gen. SATA SAS SAS-2 - Compaq BL10e | Drive technology overview - Page 8
were first introduced with HP ProLiant G6 servers in 2009. The SAS-2 interface will support SAS and SATA drives; however, the 6 Gb/s link speed is only achieved using new SAS-2 compliant disk drives. SAS-2 also supports SAS expanders to create a SAS fabric supporting large numbers of drives - Compaq BL10e | Drive technology overview - Page 9
enough to be used for server storage requirements. Unlike traditional disk drives, SSDs store data to, and retrieve data from, NAND flash memory. Until recently, storage devices based on flash memory could not meet the performance or reliability requirements for use in server environments. By taking - Compaq BL10e | Drive technology overview - Page 10
memory controllers, HP has been able to develop solid state drives that can meet the performance and reliability requirements for use in server environments. Figure 1. HP flash array itself. All HP ProLiant SSDs feature power loss protection, which ensures that in the case of power loss to the drive - Compaq BL10e | Drive technology overview - Page 11
deliver I/O performance, particularly read performance that is as good as or better than Enterprise class disk drives. SSDs are differentiated primarily by the read/write workload levels that they are able to support and their endurance, or expected service life. The current 2nd generation HP SSDs - Compaq BL10e | Drive technology overview - Page 12
and vibration (up to 1000G) Environments requiring drives with lower power consumption (2 watts) HP SSDs are designed for an operational life of over three years, the typical service life for a new server. The NAND memory used in SSDs has a relatively well understood lifespan that is primarily - Compaq BL10e | Drive technology overview - Page 13
http://h20000.www2.hp.com/bc/docs/support/Support Manual/c00301688/c00301688.pdf http://h20000.www2.hp.com/bc/docs/support/Support Manual/c01613420/c01613420.pdf Technology brief Solid state drive technology for ProLiant servers http://h20000.www2.hp.com/bc/docs/support/SupportManu al/c01580706
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Abstract
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Introduction
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Categories of server disk drives
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Characteristics of disk drives
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Small form factor and large form factor disk drives
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Disk drive capacity
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Disk drive performance
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Reliability
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Drive qualification process
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Interconnect technology
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Serial Attached SCSI (SAS)
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SAS-2
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Second generation Serial ATA (SATA)
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Interconnect bandwidths and drive throughput
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Improved performance and reliability with RAID
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Advanced controllers
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Solid state drives for servers
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HP solid state drive reliability requirements
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NAND over provisioning and wear-levelling
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Power loss protection
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Value, mainstream and performance SSDs
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SSD performance
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Conclusion
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For more information
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Call to action
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Drive technology overview
technology brief, 3
nd
edition