Monitoring wear leveling

Posted Feb 20, 2011 0:47 UTC (Sun) by rwa (subscriber, #69887)
In reply to: Monitoring wear leveling by ayers
Parent article: Optimizing Linux with cheap flash drives

Well not really standard but Intel SSDs support something like this. This is from one of our build servers:

ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  3 Spin_Up_Time            0x0020   100   100   000    Old_age   Offline      -       0
  4 Start_Stop_Count        0x0030   100   100   000    Old_age   Offline      -       0
  5 Reallocated_Sector_Ct   0x0032   100   100   000    Old_age   Always       -       11
  9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       3516
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       26
192 Unsafe_Shutdown_Count   0x0032   100   100   000    Old_age   Always       -       11
225 Host_Writes_32MiB       0x0030   200   200   000    Old_age   Offline      -       715312
226 Workld_Media_Wear_Indic 0x0032   100   100   000    Old_age   Always       -       3701
227 Workld_Host_Reads_Perc  0x0032   100   100   000    Old_age   Always       -       1
228 Workload_Minutes        0x0032   100   100   000    Old_age   Always       -       16928063
232 Available_Reservd_Space 0x0033   099   099   010    Pre-fail  Always       -       0
233 Media_Wearout_Indicator 0x0032   096   096   000    Old_age   Always       -       0
184 End-to-End_Error        0x0033   100   100   099    Pre-fail  Always       -       0

The wearout indicator (233) started ad 100 and is no at 96 after writing 21TB in almost 5 Months. It's an 160GB X-25M from Intel.