Technology considerations in selecting a direct attached storage solution for HP ProLiant Gen8 servers

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Table 5: Performance data for HP IO Accelerators
160 GB
ioDrive
320 GB
ioDrive
320 GB
ioDrive Duo
640 GB
ioDrive Duo
1.28 TB
ioDrive Duo
Write bandwidth 750 MB/s 510 MB/s 1.5 GB/s 1.0 GB/s 1.1 GB/s
Read bandwidth 770 MB/s 735 MB/s 1.5 GB/s 1.5 GB/s 1.5 GB/s
IOPS (75% reads) 123,000 67,000 238,000 138,000 150,000
Read access
latency
26 µs 29 µs 26 µs 29 µs 30 µs
HP quality focus
Our high standards ensure that all of our drives are reliable and integrate smoothly into HP server
and storage systems. We refine our processes continuously to ensure ongoing improvement in both
current and future products.
We have an extensive qualification program where HP engineers work closely with drive suppliers to
determine testing procedures and metrics that a drive must meet. The test population typically requires
approximately 1,000 individual drives to evaluate a product family during the selection-evaluation
and development-verification steps. These two steps require approximately two million drive-hours of
testing.
Drive products that pass the HP qualification process move into the HP drive performance-monitoring
phase during volume production, where continuous improvement is possible.
HP engineers and the drive suppliers work as a team during the volume production phase of a
product. The team monitors each product’s performance through quality control methods at the
supplier’s factory and at HP option kitting configuration sites. We review product quality data on a
daily, weekly, and monthly basis.
Conclusion
Because of the advancements in storage technology, you can choose from a broad spectrum of direct
attach storage solutions, each with unique capacity, performance, and reliability characteristics.
When considering which technology to choose for your storage needs, consider all factors that
contribute to the solution.
The interface type affects performance, future expansion, and reliability of the storage system. Serial
Attached SCSI has advantages in these areas over the SATA interface.
Controller technology determines system performance, capacity limits, manageability, and data
security. For all but smaller, lower performance systems, choosing an appropriate Smart Array
Controller adds state-of-the-art availability and security options to your system.
Drives perform best when matched to the goals of the storage system. Our portfolio of hard disk
drives satisfies capacity, performance, and cost goals. Add solid-state storage for the highest
performance and data availability when endurance limits and cost are justified, and IO Accelerators
where lowest access latency is required.
HP has industry-leading storage technologies to handle all of your requirements. Our storage products
are rigorously tested and certified for their targeted applications.