I just bought a WD Blue 500GB SSD that was sold as "new" but as a returned item (package had been opened). I am uncertain if there is an issue in the SMART report--which I did in the WD Dashboard immediately upon receiving the drive.
This shows Power On Hours of only 15, which seems reasonable if someone tried out the drive and decided to return it because it was not adequate for their needs. However, what concerns me is that the SSD shows a Drive Power Cycle Count of 4875 (RAW #, but I think this is the actual number of power cycles being indicated), and the Unexpected Power Loss Count is stated as 4869 (RAW value again). If these are the actual numbers, that would seem to indicate that the drive powered off, perhaps unexpectedly, MANY times in those 15 hours of run time. Only 6 power cycles were considered normal.
So, first of all, am I understanding the data given by SMART correctly?
My thought is that there could be several reasons for these numbers, and some might not have to do with any problem with the drive itself--I need help in how to consider this information. For example, there could have been a serious problem with the cable or the controller the drive was connected to. If that was it, it might not be the drive's fault (though that might account for it being returned), but do I need to be concerned about the drive being damaged anyway? If I see no further progression in unexpected drive restarts (so far, there are none), should I not be too concerned with these numbers? Or should I? NOTE: The short and extended tests both report the drive as OKAY, but the above numbers are troubling.
I should add that the SMART report includes a RAW SLC Block Erase Count of 3604523. Perhaps that's just because whatever data was put on the drive by the first owner was then deleted? Also, Maximum Bad Blocks /Die is given as 36, and Total Bad Blocks shows as 521. (Both are RAW numbers.)
Any help with understanding how to read the SMART status with these numbers, or advice about how to consider the status of this drive? Should I be concerned?
Thanks,
Michael
This shows Power On Hours of only 15, which seems reasonable if someone tried out the drive and decided to return it because it was not adequate for their needs. However, what concerns me is that the SSD shows a Drive Power Cycle Count of 4875 (RAW #, but I think this is the actual number of power cycles being indicated), and the Unexpected Power Loss Count is stated as 4869 (RAW value again). If these are the actual numbers, that would seem to indicate that the drive powered off, perhaps unexpectedly, MANY times in those 15 hours of run time. Only 6 power cycles were considered normal.
So, first of all, am I understanding the data given by SMART correctly?
My thought is that there could be several reasons for these numbers, and some might not have to do with any problem with the drive itself--I need help in how to consider this information. For example, there could have been a serious problem with the cable or the controller the drive was connected to. If that was it, it might not be the drive's fault (though that might account for it being returned), but do I need to be concerned about the drive being damaged anyway? If I see no further progression in unexpected drive restarts (so far, there are none), should I not be too concerned with these numbers? Or should I? NOTE: The short and extended tests both report the drive as OKAY, but the above numbers are troubling.
I should add that the SMART report includes a RAW SLC Block Erase Count of 3604523. Perhaps that's just because whatever data was put on the drive by the first owner was then deleted? Also, Maximum Bad Blocks /Die is given as 36, and Total Bad Blocks shows as 521. (Both are RAW numbers.)
Any help with understanding how to read the SMART status with these numbers, or advice about how to consider the status of this drive? Should I be concerned?
Thanks,
Michael
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