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 ST9120821AS with firmware 3.14.
NOTE: a S.M.A.R.T. model for this hard disk is not available (yet). Attribute comparison has been made against standard values. New models are computed often and in the future this hard disk should take advantage of the additional crowd knowledge.

Your hard disk temperature is 34°C.

  Attribute   Current   Raw
Raw Read Error Rate 114 000004D6F859
Spin Up Time 97 000000000000
Start/Stop Count 96 0000000012E6
Reallocated Sector Count 98 000000000072
Seek Error Rate 87 00002285AD83
Power On Hours Count 79 000000004A5D
Spin Retry Count 100 000000000000
Power Cycle Count 96 0000000011E7
Reported Uncorrectable Errors 1 000000001288
High Fly Writes 14 000000000056
Power Off Retract Count 99 000000000E7A
Load Cycle Count 1 000000085140
Hardware ECC Recovered 68 00000B0EF120
Current Pending Sector 1 0000FFFFFFF2
Offline Uncorrectable Sector Count 1 0000FFFFFFF2
Ultra DMA CRC Error Rate 200 000000000000
Write Error Rate 100 000000000000
TA Increase Count 100 000000000000

Troubled attributes:
Attribute Airflow Temperature failed in the past. Its current value is 66, the worst value was 37 and the threshold is 45. According to the manufacturer, this is an advisory condition.

SERIOUS ISSUE : your hard disk has 114 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.

BLOCKING ISSUE : your hard disk has 65522 pending sectors (this value is very large and your hard disk should be replaced). Those are sectors that couldn't be properly read and that the hard disk logic is waiting for a write operation to try to remap to a spare sector (if available). According to the Reallocated Sector Count attribute, your hard disk seems to have available spare sectors. A simple disk surface scan won't be enough to force the remap operation. You need a read/write surface scan to remap the sector. The best option should be a tool that knows about what should be read from that sector so that it has some option to apply the best fix to the missing data.

BLOCKING ISSUE : your hard disk has 65522 offline uncorrectable sectors (this value is very large and your hard disk should be replaced). Those are sectors that an offline scanning found as unreadable. Offline scanning is a process that can be automatically started by the hard disk logic when a long enough idle period is detected or that can be forced by some tool. Those unreadable sectors are identified and the hard disk logic is waiting for a write command that will overwrite them to try to remap them to spare sectors (if available). According to the Reallocated Sector Count attribute, your hard disk seems to have available spare sectors. A simple disk surface scan won't be enough to force the remap operation. You need a read/write surface scan to remap the sector. The best option should be a tool that knows about what should be read from that sector so that it has some option to apply the best fix to the missing data.

The overall fitness for this drive is 0%.
The overall performance for this drive is 98%.

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.