Datasheet

Intel® Solid-State Drive DC S3500
Product Specification April 2013
22 Order Number: 328860-001US
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). 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.
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. 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.