Parameter value | Description |
Read Error Rate | The frequency of errors during disk read operations. |
Spin Up Time | Average time of spinup from 0 spins per minute to the working speed. |
Reallocated Sectors Count | Number of reallocated sectors. A sector is marked as reallocated when a read, write or verification error occurs on the disk. The data is moved to a special backup (spare area). When a large number of sectors are reallocated, the data reading speed drops sharply (up to 10% or more). |
Seek Error Rate | The rate of seek errors of the magnetic heads. Seek errors will arise there if is a partial failure in the mechanical positioning system, damage to a servo, or thermal widening of the hard disk. |
Spin-Up Retry Count | The number of attempts to reach the fully operational disk spin speed. |
Temperature | Hard drive temperature. |
Power-On Hours | The count of hours in power-on state. |
Power Cycle Count | The count of full hard disk power on/off cycles. |
Hardware EСС Recovered | Number of errors detected and fixed by the ECC memory of the drive. |
Reallocation Event Count | Number of sector reallocation events. |
Current Pending Sector Count | The number of unstable sectors for reallocation to the disk’s spare area. |
Uncorrectable Sector Count | The number of unstable sectors detected when testing the disk offline. |
End-to-End Error | A count of errors that occurred when transferring data via the drive's cache. |
Reported Uncorrected Errors | The count of sectors that were declared as unstable for reallocation for the whole lifecycle of the drive. If a sector is declared a unstable for a second time, the value of the attribute will also increase. |
Command Timeout | The count of operations that were canceled because their execution time exceeded the drive timeout period. |
Disk Shift | Distance the disk has shifted relative to the spindle. |
Percentage Lifetime Remaining | Remaining lifetime of the hard drive in percents. |
Media Wearout Indicator | Information about HD wearout. |
Average Erase Cycle | The average number of erase cycles. |
Host Writes | Number of writes to the NAND memory (Not-And). |
Soft Read Error Rate | Frequency of software read errors. |
Total Written | Total volume of information on the disk. |
Total Read | Total volume of information read from the disk. |
Max Erase Cycle | Maximum possible number of disk erase cycles. |
Total Erase Cycle | Total number of disk erase cycles. |
Available Spare | The amount of spare memory remaining on the disk. |
Unknown | A parameter that could not be determined. |