Datasheet

Intel® Solid-State Drive DC S3700 Series
User Notes
• Sending a SMART EXECUTE OFFLINE IMMEDIATE (B0h/D4h) subcommand 40h to the SSD
resets and starts all three attributes (Media Wear Indicator, Attribute E2h, Host Reads
Percentage, Attribute E3h, and the Workload timer, Attribute E4h) to FFFFh.
• The Attribute raw values are held at FFFFh until the Workload timer (Attribute E4h) reaches a
total of 60 (minutes) of power on time. After 60 minutes, the Timed Workload data is made
available.
• After the Workload timer (E4h) reaches 60 (minutes), the Timed Workload data is saved every
minute so only 59 seconds of data is lost if power is removed without receiving ATA STANDBY
IMMEDIATE. Accumulated data is not reset due to power loss.
• Upon power up, the attributes hold a snapshot of their last saved values for 59 seconds and
live data is available after 60 seconds, once the initial one hour interval is completed.
Example Use Cases
The Timed Workload Endurance attributes described in this section are intended to be used to
measure the amount of media wear that the drive is subjected to during a timed workload.
Ideally, the system that the drive is being used in should be capable of issuing SMART commands.
Otherwise, provisions have been provided to allow the media wear attributes to be persistent so
the drive can be moved to a SMART capable system to read out the drive wear attribute values.
Use Case 1 – With a System Capable of SMART Commands
1. On a SMART capable system issue the SMART EXECUTE OFF-LINE IMMEDIATE (D4h)
sub-command 40h to reset the drive wear attributes.
2. Run the workload to be evaluated for at least 60 minutes. Otherwise the drive wear attributes
will not be available.
3. Read out the drive wear attributes with the SMART READ DATA (D0h) command.
Use Case 2 – With a System Not Capable of SMART Commands
1. On a SMART capable system, issue the SMART EXECUTE OFF-LINE IMMEDIATE (D4h)
sub-command 40h to reset the drive wear attributes.
2. Move the drive to the system where the workload will be measured (and not capable of
SMART commands).
3. Run the workload to be evaluated for at least 60 minutes. Otherwise the drive wear attributes
will not be available.
4. Do a clean system power down by issuing the ATA STANDBY IMMEDIATE command prior to
shutting down the system. This will store all the drive wear SMART attributes to persistent
memory within the drive.
5. Move the drive to a SMART capable system.
6. Read out the drive wear attributes with the SMART READ DATA (D0h) command within 59
seconds after power-up.
January 2015 Product Specification
328171-010US 25