Intel Solid-State Drive Toolbox User Guide

Intel
®
Solid-State Drive Toolbox User Guide
Intel
®
Solid-State Drive Toolbox
User Guide September 2011
14 Order Number: 325912-001US
C0
Unsafe Shutdown Count (Power-off Retract Count)
The raw value reports the cumulative number of unsafe (unclean) shutdown events over the life of the
device. An unsafe shutdown occurs whenever the device is powered off without STANDBY IMMEDIATE being
the last command.
C2
Temperature - Device Internal
Reports internal temperature of the SSD. Temperature reading is the value direct from the internal sensor.
The raw value is the current temperature. The normalized value is the results equation min(150-current
temp, 100).
C7
CRC Error Count
The total number of encountered SATA interface Cyclic Redundancy Check (CRC) errors.
E1
Host Writes
The raw value reports the total number of sectors written by the host system. The raw value increases by 1
for every 65,536 sectors written by the host.
E2
Timed Workload, Media Wear
Measures the wear seen by the SSD (since reset of the Timed Workload Timer, attribute E4), as a
percentage of the maximum rated cycles.
E3
Timed Workload, Host Read/Write Ratio
The percentage of I/O operations that are read operations (since reset of the Timed Workload Timer,
attribute E4).
E4
Timed Workload Timer
Measures the elapsed time (number of minutes) since starting this workload timer.
E8
Available Reserved Space
Reports the number of reserve blocks remaining. The normalized value begins at 100 (64h), which
corresponds to 100 percent availability of the reserved space. The threshold value for this attribute is 10
percent availability.
E9
Media Wearout Indicator
Reports the number of cycles the NAND media has undergone. The normalized value declines linearly from
100 to 1 as the average erase cycle count increases from 0 to the maximum rated cycles. Once the
normalized value reaches 1, the number will not decrease, although it is likely that significant additional
wear can be put on the device.
F1
Total LBAs Written
Counts sectors written by the host.
F2
Total LBAs Read
Counts sectors read by the host.
Note: To reissue the ATA IDENTIFY DEVICE command and refresh the SMART information for the selected
drive, click Refresh on the home screen.