S.M.A.R.T. Details (Advanced Mode)

This page becomes accessible after switching to the Advanced mode, and is intended for the computer hardware specialists familiar with S.M.A.R.T. technology. The page contains detailed information about important parameters describing various aspects of the drive's performance and reliability. This information is used by Hard Drive Inspector (HDI) for a drive condition analysis (the results of the analysis are represented on the Health Summary page).

If you are not familiar with S.M.A.R.T., we strongly recommend you to read this brief introduction first.

ATA S.M.A.R.T. (Attributes table)

HDI displays S.M.A.R.T. attributes information as a table of six columns:

1. Graphical indicator in the first column is a visual representation of the current state of the attribute. There are five possible states:
   

   	- the attribute value hasn't changed since the beginning of monitoring.
   	- the attribute value changed since the beginning of monitoring.
   	- the attribute value is lower than 50%.
   	- the attribute value is lower than 30%.
   	- the attribute value has fallen below its threshold.



2. S.M.A.R.T. attribute number.
3. Attribute name and short description.
4. Current state in percent. Here you can also see a diagram that shows the history of attribute changes. Note: a drive itself doesn't keep the history of changes, so HDI can show this data only since the time the program was installed on the computer.
5. Attribute value. Besides the current value and the threshold value described in the S.M.A.R.T. standard, HDI also shows the best and the worst values registered during attribute monitoring.
6. Attribute flags.
   • Life-critical (LC) - attribute directly affects disk reliability.
   • Performance related (PR) - attribute indicates disk performance degradation.
   • Error rate (ER) - means that attribute measures frequency of errors.
   • Event count (EC) - means that attribute is used as an event counter.
   • Self-preserving (SP) - attribute is automatically preserved and restored each time when performing S.M.A.R.T. tests.
   • Online collection (OC) - the value of this attribute is calculated during Online test.

SCSI S.M.A.R.T. (Attributes table)

SCSI devices have S.M.A.R.T. attributes similar to those of ATA disks, but their values a less informative because only current value is available for each attribute, threshold values are not defined. This makes it impossible for HDI to estimate SCSI disks' health automatically, so user has to do it manually using these raw data. Values of  some S.M.A.R.T. attributes in SCSI devices are counted separately for Read, Write and Verify operations, such values are displayed in a 4-column table.