Understanding endurance and performance characteristics of HP solid state drives

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SMARTSSD Wear Gauge alerts and indicators
The Wear Gauge defines certain indicators and status level metrics for an SSD’s condition. All the tools
that report SMARTSSD status use these indicators consistently. Table 2 shows the indicators and the
status levels they represent.
Table 2: SMARTSSD Wear Gauge indicators.
SMARTSSD Wear Gauge
SSD Status
Drive has sufficient endurance remaining
Drive has reached one or more of the status metrics indicating
its remaining endurance is low.
 56 days of usage remaining at current workload
 5% of usage remaining
 2% of usage remaining
Drive has reached 0% usage remaining and has been marked
with a Predictive Failure.
Reaching 0% usage remaining does not mean that the Solid State Drive will stop operating
immediately. It indicates that the SSD has reached the end of its calculated lifespan and that you should
replace it to avoid potential data loss.
Integration of SMARTSSD Wear Gauge with Storage Agents
The Storage Agents for various Operating Systems support SMARTSSD data. The agents deliver
information on SSD wear status, power–on hours; percentage of endurance used and estimated
endurance remaining in days. The HP Systems Management Homepage for the server displays this
information. SMARTSSD data is currently supported by the Storage Agents for the following operating
environments:
 SNMP Storage Agents for Windows, Linux and VMWare® ESX
 WBEM Storage Agents for Windows and VMWare® ESXi
The storage agents also deliver SMARTSSD status and updates to the OS event logs and via SNMP
Traps. The agents send traps whenever the SSD endurance passes one of the four pre-defined
milestones.
 56 days estimated endurance remaining
 5% endurance remaining
 2% endurance remaining
 SSD Wear Out (0% endurance remaining)
SSDs and data retention
Data retention is the ability of a storage device to retain data after you remove it from service. SSD
data retention characteristics are different from those of traditional disk drives. Three factors influence
an SSD’s data retention:
 The percentage of the SSD’s remaining endurance (lifespan) when you remove it from service.