Hi,

I have debian Squeeze installed on my machine. Computer is deployed with hard drive MAXTOR STM3320613AS. Recently, smartd have printed to logs the following messages:

Feb 4 20:53:18 zsm-debian smartd[1868]: Device: /dev/sda [SAT], 3 Currently unreadable (pending) sectors Feb 4 20:53:18 zsm-debian smartd[1868]: Device: /dev/sda [SAT], 3 Offline uncorrectable sectors Feb 4 20:53:18 zsm-debian smartd[1868]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 68 to 69 Feb 4 20:53:18 zsm-debian smartd[1868]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 32 to 31

After that I ran short selftests on given device, but they haven't found any error:

# smartctl -l selftest /dev/sda
smartctl 5.40 2010-07-12 r3124 [x86_64-unknown-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF READ SMART DATA SECTION ===
Raw_Read_Error_Rate, Seek_Error_Rate and Reallocated_Sector_Ct - See more at: http://www.dlaube.com/2010/04/how-to-determine-if-a-sata-drive-is-failing/#sthash.MbF88UnI.dpuf Raw_Read_Error_Rate, Seek_Error_Rate and Reallocated_Sector_Ct - See more at: http://www.dlaube.com/2010/04/how-to-determine-if-a-sata-drive-is-failing/#sthash.MbF88UnI.dpuf
SMART Self-test log structure revision number 1
Raw_Read_Error_Rate, Seek_Error_Rate and Reallocated_Sector_Ct - See more at: http://www.dlaube.com/2010/04/how-to-determine-if-a-sata-drive-is-failing/#sthash.MbF88UnI.dpuf Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 2  Short offline       Completed without error 00% 6285         -
# 3  Short offline       Completed without error 00% 6285         -

Parameters of given disk are as follows:

# smartctl -A /dev/sda
smartctl 5.40 2010-07-12 r3124 [x86_64-unknown-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF READ SMART DATA SECTION ===
SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x000f 117 099 006 Pre-fail Always - 145320438 3 Spin_Up_Time 0x0003 100 100 000 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 505 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 7 Seek_Error_Rate 0x000f 077 060 030 Pre-fail Always - 55435033 9 Power_On_Hours 0x0032 093 093 000 Old_age Always - 6286 10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 507 184 End-to-End_Error 0x0032 100 100 099 Old_age Always - 0 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0 188 Command_Timeout 0x0032 100 098 000 Old_age Always - 44 189 High_Fly_Writes 0x003a 080 080 000 Old_age Always - 20 190 Airflow_Temperature_Cel 0x0022 069 056 045 Old_age Always - 31 (Lifetime Min/Max 31/33) 194 Temperature_Celsius 0x0022 031 044 000 Old_age Always - 31 (0 15 0 0) 195 Hardware_ECC_Recovered 0x001a 039 032 000 Old_age Always - 145320438 197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 3 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 3 199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0 240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline - 146926536235149 241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 1178970182 242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 2406483650

where Seek_Error_Rate grows slowly (aprox. by 3 every 2 seconds).

I have read that important pre-failing parameters are Raw_Read_Error_Rate, Seek_Error_Rate and Reallocated_Sector_Ct but still I can't decide whether disk is failing or not. Can somebody help, whether it is needed to replace disk or not? Any help is appreciated...

Regards

Matus Valo
Raw_Read_Error_Rate, Seek_Error_Rate and Reallocated_Sector_Ct - See more at: http://www.dlaube.com/2010/04/how-to-determine-if-a-sata-drive-is-failing/#sthash.MbF88UnI.dpuf

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