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

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Wear leveling
HP wear leveling technology uses sophisticated algorithms to re-map logical blocks receiving frequent
writes to different physical pages. It evenly distributes erasures and rewrites across the storage
medium to maximize endurance.
Wear Gauge
HP ProLiant and BladeSystem servers have HP SMARTSSD Wear Gauge technology. Through
configuration and management software, it monitors and reports the percentage of SSD drive life
used and the amount of life remaining under the workload-to-date. Alerts notify you when little drive
life remains so you can replace a drive before it fails.
SSD performance
Enterprise Value, Mainstream, and Performance SSDs all deliver I/O performance comparable to
Enterprise HDDs. SSDs differ from HDDs primarily by the read/write workload levels they can support
(Table 4) and their expected service life:
• Enterprise Value SSDs provide relatively large storage capacities at lower costs, but they do not
have the endurance of the Mainstream or Performance SSDs.
• Enterprise Mainstream SSDs have smaller capacities but greater endurance than Value SSDs.
• Enterprise Performance SSDs have capacities similar to Mainstream SSDs but have greater
endurance.
The higher data rates of SSDs can increase the probability that an unreported data bit error can
occur. Our Enterprise class SSDs and HDDs have full data-path error detection. Some of our drives
also have error correction.
Our SSDs have power loss protection. It ensures that if a drive loses power, including hot plug
removal, it can recover quickly when power is restored.
Our SSDs fit seamlessly into the existing HP server infrastructure and deliver exceptional performance
in high random-read IOPS applications as shown in Table 4. All performance values are typical and
for comparison only.