Typically once this starts to happen will the see the drive fail completely. There are 4 smart values that are of interesting: 1 Raw_Read_Error_Rate 0x000f 072 063 044 Pre-fail Always - 14974679 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 195 Hardware_ECC_Recovered 0x001a 029 019 000 Old_age Always - 14974679 and I think its this one: 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0 If the counts on (1) and (195) are the same you are good. If (5) is not 0 that means the drive is replacing bad blocks. Watch the valiue if it rises over time backup the drive and replace it. And you may well be seeing (198) rise in which case you are losing data. The other thing to look for is uncorrectable disk accesses that you can see in dmesg (I think UNC is in the message as well). Once you get these you have lost data and you are likely to lose the whole drive. Also note that on a desktop motherboard smart error can prevent you booting into the OS. Server motherboard do not do this. Barry |
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