I have a hard drive that was donated to me from a client's old computer. I'm trying to determine how old it is, and how much it has been used.
Do hard drives keep track of statistics about their use? E.g. how many hours they've been running for in their lifetime? How many times they've been power cycled?
I found a few utilities that gave me "statistics" about the hard drive from it's S.M.A.R.T data, but the figures are confusing. How come 99% of them are "253"? The warnings are opposite of what I would expect. Apparantly my power cycles rating is LOWER than expected and this is a bad thing? Doesn't make sense
Can somebody explain these statistics to me?
Or point me at a better way of determining usage information about a hard drive?
Attached is the SMART data analysis:
Your hard disk is a Maxtor 6E040L0 with firmware NAR61HA0.
The average temperature for this hard disk is 33C (MIN=21C MAX=46C) and yours is 43C.
Spin Up Time 222 8928 Normal
Start/Stop Count 252 2069 Watch
Warning: Start/Stop Count is below the average limits (253-253).
Reallocated Sector Count 253 0 Very good
Read Channel Margin 253 0 Very good
Seek Error Rate 253 0 Very good
Seek Time Performance 244 55465 Watch
Warning: Seek Time Performance is below the average limits (246-253).
Power On Hours Count 232 63318 Normal
Spin Retry Count 253 0 Very good
Calibration Retry Count 253 0 Very good
Power Cycle Count 248 2074 Watch
Warning: Power Cycle Count is below the average limits (249-253).
Power Off Retract Count 251 2033 Watch
Warning: Power Off Retract Count is below the average limits (252-253).
Load Cycle Count 251 8737 Watch
Warning: Load Cycle Count is below the average limits (252-253).
Hardware ECC Recovered 253 8194 Very good
Reallocated Event Count 253 0 Very good
Current Pending Sector 253 0 Very good
Offline Uncorrectable Sector Count 253 0 Very good
Ultra DMA CRC Error Rate 199 1 Very good
Write Error Rate 253 0 Very good
Soft Read Error Rate 253 1 Very good
TA Increase Count 253 0 Very good
Run Out Cancel 253 0 Very good
Shock Count Write Opern 253 0 Very good
Shock Rate Write Opern 253 0 Very good
Spin High Current 253 0 Very good
Spin Buzz 253 0 Very good
Offline Seek Performance 186 0 Normal
Unknown attribute 99 253 0 Very good
Unknown attribute 100 253 0 Very good
Unknown attribute 101 253 0 Very good
NOTE: not all warnings are reflected on fitness and performance overall values as relevancy is based upon the settings from the hard disk manufacturer who is the best entity deputed to define such relationships.
NOTE : your hard disk Power Cycle Count attribute current value (248) is below the normal range (249 - 253) reported for your specific hard disk model. Basically your hard disk was power cycled more times than the maximum number the average hard disk was. Power cycles put some stress on the hard disk mechanic. Sometimes power cycles can be caused by a loose hard disk power connector. Make sure it is properly fastened.
The overall fitness for this drive is 87%.
The overall performance for this drive is 87%.