Also, you can check that they are not running hot. When the error rate starts going up, its time to look for a replacement. This gives you a way to measure the drive health subjectively. The stuff that most interest me are the following: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUEġ Raw_Read_Error_Rate 0x000f 100 100 051 Pre-fail Always - 0ħ Seek_Error_Rate 0x000f 100 100 051 Pre-fail Always - 0ĩ Power_On_Hours 0x0032 097 097 000 Old_age Always - 13946ġ3 Read_Soft_Error_Rate 0x000e 100 100 000 Old_age Always - 0ġ90 Airflow_Temperature_Cel 0x0022 075 066 000 Old_age Always - 25ġ94 Temperature_Celsius 0x0022 075 064 000 Old_age Always - 25ġ96 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0ġ99 UDMA_CRC_Error_Count 0x003e 100 100 000 Old_age Always - 0Ģ00 Multi_Zone_Error_Rate 0x000a 100 100 000 Old_age Always - 0Ģ01 Soft_Read_Error_Rate 0x000a 100 100 000 Old_age Always - 0 However, if your system is a home server, just checking manually is often better. Firstly, use the fdisk command with superuser privileges to display information about all your disk drives or flash memory plus their partitions: sudo fdisk -l List Linux Filesystem Partitions Then scan your Linux disk drive to check for bad sectors/blocks by typing: sudo badblocks -v /dev/sda10 > badsectors. There is a daemon called smartd which can help you with continuous monitoring. To run a long test, the command is: sudo smartctl -t long -a /dev/sdX. The s and display commands work with physical volumes (pv), volume groups (vg), and logical volumes (lv) so it is a good place to start when trying to figure out the current settings. It can query the SMART interface on your disks, which is in most modern disks. The first thing you may need to do is check how your LVM is set up. Typically, what you wan is a package called smartmontools.
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