Hard disk health and reliability analysis

Almost every EIDE or SATA hard disk includes S.M.A.R.T. data. That information is collected by the drive itself and contains data that the manufacturer considered relevant to check reliability. The data is made up of several attributes that have a current value, a worst one, a threshold, some raw data, and some flags. Basically, when any attribute's current value is below its threshold, the hard disk is considered unreliable and likely to fail. By using several techniques, this report tries to give a wider range of information, basing its analysis on advanced comparisons with normal values based on real hard disks and on expert-like checks. The final results are not to be taken as an absolute truth, but they are almost as good as a professional expert advice about your hard disk status.

Your hard disk is a ST31000528AS with firmware CC38.
The average temperature for this hard disk model is 33°C (min=24°C max=42°C) and yours is 35°C.

  Attribute   Current   Raw
Raw Read Error Rate 120 00000E1FFED9
Spin Up Time 95 000000000000
Start/Stop Count 88 00000000300F
Reallocated Sector Count 73 000000000473
Seek Error Rate 78 0000041F462C
Power On Hours Count 68 000000006E7D
Spin Retry Count 100 000000000000
Power Cycle Count 100 0000000002FD
SATA Downshift Error Count 100 000000000000
End To End Error Count 100 000000000000
Reported Uncorrectable Errors 100 000000000000
Command Time Out 100 000100010007
High Fly Writes 100 000000000000
Hardware ECC Recovered 29 00000E1FFED9
Current Pending Sector 100 000000000000
Offline Uncorrectable Sector Count 100 000000000000
Ultra DMA CRC Error Rate 200 000000000000
Write head 100 4F0B00004BB7
Total LBAs Written 100 0000E6908566
Total LBAs Read 100 00005A461A5A

All the attributes of your hard disk are above the S.M.A.R.T. thresholds set by the manufacturer. This is good.

SERIOUS ISSUE : your hard disk has 1139 reallocated sectors. Hard disks do have spare sectors (usually from 256 up to 2560) used to replace bad ones. This remapping operation is transparent to the end user. Anyway, this can lead to degraded performances (because remapped sectors are in different places of the disk than the original ones and the head needs additional moving). If reallocated sectors grow over time, you might encounter some serious troubles. A backup of the most important data is suggested anyway.

NOTE : your hard disk Power On Hours Count attribute current value (68) is below the normal range (98 - 100) reported for your specific hard disk model. Basically your hard disk was powered on for more than the maximum time the average user did. This means that either all of the reports collected are from hard disks that were not powered on for too long (this is realistic for recent models) or that your hard disk is becoming old. Usually this is not considered as a pre-failure advisory, but you should check whether you want to replace the hardware or keep an eye on its performances over time.

The overall fitness for this drive is 0%.
The overall performance for this drive is 96%.

The link to get back and see a new report about this hard disk in the future is this. Consider that new hard disks and new checks are added over time.


DISCLAIMER: this report does its best to highlight issues and warnings related to your hard disk. It cannot be held responsible for any mistake. This page and its results cannot be used in any other way but the one defined by its author.