Compaq ProLiant 1000 Drive technology overview
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- Compaq ProLiant 1000 | Drive technology overview - Page 1
SAS-2 ...8 Second generation Serial ATA (SATA 8 Interconnect bandwidths and drive throughput 8 Improved performance and reliability with RAID 9 Advanced controllers ...9 Solid state drives for servers...9 HP solid state drive reliability requirements 10 NAND over provisioning and wear-levelling - Compaq ProLiant 1000 | Drive technology overview - Page 2
or less. Typical intended applications for Entry drives are internal/archival storage 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 - Compaq ProLiant 1000 | Drive technology overview - Page 3
and electrically with HP ProLiant servers or storage products. This mechanical commonality extends to most SAS-based StorageWorks and HP Integrity server products as well. Thus, mixed HP Enterprise solutions can be supported by a common family of hard drives. Technological advances continue - Compaq ProLiant 1000 | Drive technology overview - Page 4
, have hastened this transition. By the end of 2010, all new enterprise class drives and all new 10k and 15k RPM drives will be SFF. HP expects to continue to develop 3.5-inch midline and entry class drives. Disk drive capacity The capacity of a drive, measured in gigabytes, is set at manufacturing - Compaq ProLiant 1000 | Drive technology overview - Page 5
decouple the logical and physical operations of the disk. 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 - Compaq ProLiant 1000 | Drive technology overview - Page 6
3. Supplier production qualification 4. Continuous improvement/performance monitoring 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 - Compaq ProLiant 1000 | 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 drives -standard servers 2nd swap support yes yes yes Drive ID Drives supported Optional - Compaq ProLiant 1000 | Drive technology overview - Page 8
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 on a disk - Compaq ProLiant 1000 | Drive technology overview - Page 9
SCSI interfaces. For further details, see the technology brief entitled "HP Smart Array Controller Technology," at http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00687518/c00687518.pdf. Solid state drives for servers Solid state drives represent a new type of storage technology that is now - Compaq ProLiant 1000 | Drive technology overview - Page 10
speed DRAM on the controller and periodically written to metadata regions in the NAND flash array itself. All HP ProLiant SSDs feature power loss protection, which ensures that in the case of power loss to the drive (including hot plug removal) all of this information is written to the NAND metadata - Compaq ProLiant 1000 | Drive technology overview - Page 11
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 service life. Unconstrained workloads < 1 year Usage environment Interface Power Operating Environment Boot devices - Compaq ProLiant 1000 | Drive technology overview - Page 12
higher shock 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 - Compaq ProLiant 1000 | 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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1
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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8
Interconnect bandwidths and drive throughput
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8
Improved performance and reliability with RAID
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9
Advanced controllers
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9
Solid state drives for servers
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9
HP solid state drive reliability requirements
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10
NAND over provisioning and wear-levelling
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10
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
rd
edition