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Intel® Solid-State Drive DC S3500
Product Specification December 2013
24 328860-003US
Table 19. SMART Attribute Status Flags
Status Flag Description Value = 0 Value = 1
SP
Self-preserving attribute
Not a self-preserving attribute
Self-preserving attribute
EC
Event count attribute
Not an event count attribute
Event count attribute
ER
Error rate attribute
Not an error rate attribute
Error rate attribute
PE
Performance attribute
Not a performance attribute
Performance attribute
OC
Online collection attribute Collected only during offline activity
Collected during both offline and
online activity
PW
Pre-fail warranty attribute
Advisory
Pre-fail
5.4.1 Timed Workload Endurance Indicators
Timed Workload Media Wear Indicator — ID E2h
This attribute tracks the drive wear seen by the device during the last wear timer loop, as
a percentage of the maximum rated cycles. The raw value tracks the percentage up to 3
decimal points. This value should be divided by 1024 to get the percentage.
For example: if the raw value is 4450, the percentage is 4450/1024 = 4.345%. The raw
value is held at FFFFh until the wear timer (attribute E4h) reaches 60 (minutes) after a
SMART EXECUTE OFFLINE IMMEDIATE (B0h/D4h) subcommand 40h to the SSD. The
normalized value is always set to 100 and should be ignored.
Timed Workload Host Reads Percentage — ID E3h
This attribute shows the percentage of I/O operations that are read operations during the
last workload timer loop. The raw value tracks this percentage and is held at FFFFh until
the workload timer (attribute E4h) reaches 60 (minutes). The normalized value is always
set to 100 and should be ignored.
Workload Timer — ID E4h
This attribute is used to measure the time elapsed during the current workload. The
attribute is reset when a SMART EXECUTE OFFLINE IMMEDIATE (D4h) subcommand 40h
is issued to the drive. The raw value tracks the time in minutes and has a maximum value
of 232 = 4,294,967,296 minutes (8,171 years). The normalized value is always set to
100 and should be ignored.
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.