You know, I’ve never really paid much attention to the SMART info / diagnostic stats stored by my hard drive.

Here’s my old mid-2012 MacBook Air 11” with a 128GB SSD:

=== START OF INFORMATION SECTION ===
Model Family:     Apple MacBook Air SSD
Device Model:     APPLE SSD TS128E
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000a   100   100   000    Old_age   Always       -       0
  2 Throughput_Performance  0x0005   100   100   050    Pre-fail  Offline      -       0
  3 Spin_Up_Time            0x0007   100   100   050    Pre-fail  Always       -       0
  5 Reallocated_Sector_Ct   0x0012   100   100   050    Old_age   Always       -       0
  7 Unknown_SSD_Attribute   0x000b   100   100   050    Pre-fail  Always       -       0
  8 Unknown_SSD_Attribute   0x0005   100   100   050    Pre-fail  Offline      -       0
  9 Power_On_Hours          0x0012   100   100   000    Old_age   Always       -       4135
 10 Unknown_SSD_Attribute   0x0013   100   100   050    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0012   076   076   000    Old_age   Always       -       24812
167 Unknown_Attribute       0x0012   100   100   000    Old_age   Always       -       0
168 Unknown_Attribute       0x0012   200   200   000    Old_age   Always       -       0
169 Unknown_Attribute       0x0013   100   100   010    Pre-fail  Always       -       1576417167151
170 Unknown_Attribute       0x0013   100   100   010    Pre-fail  Always       -       0
171 Unknown_Attribute       0x0000   100   100   000    Old_age   Offline      -       0
173 Wear_Leveling_Count     0x0013   168   168   100    Pre-fail  Always       -       2680123491006
175 Program_Fail_Count_Chip 0x0013   100   100   010    Pre-fail  Always       -       0
177 Wear_Leveling_Count     0x0000   000   000   000    Old_age   Offline      -       13
181 Program_Fail_Cnt_Total  0x0032   000   000   000    Old_age   Always       -       0
182 Erase_Fail_Count_Total  0x0032   000   000   000    Old_age   Always       -       0
187 Reported_Uncorrect      0x0012   100   100   000    Old_age   Always       -       10
192 Power-Off_Retract_Count 0x0012   000   000   000    Old_age   Always       -       114
194 Temperature_Celsius     0x0023   100   026   000    Pre-fail  Always       -       0 (Min/Max 0/74)
197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0
199 UDMA_CRC_Error_Count    0x0012   200   200   000    Old_age   Always       -       0
233 Media_Wearout_Indicator 0x0000   000   000   000    Old_age   Offline      -       76254
240 Unknown_SSD_Attribute   0x0013   100   100   050    Pre-fail  Always       -       0
241 Host_Writes_GiB         0x0032   000   000   000    Old_age   Always       -       26713
242 Host_Reades_GiB         0x0032   000   000   000    Old_age   Always       -       31747

Honestly, I’m not 100% sure what this means.

26.7 TB written? That’s it?

4,135 hours powered on? Again, that’s it? That’s like, half a year. When in the last 7 years has this laptop been off?

Media Wearout Indicator = 0, but raw value = 76254. What does it mean? I don’t know. I think that means it’s got 0% left, it’s just completely tuckered out, but I can’t be sure (I should have kept historicals, too bad).

It is about 26 C, so maybe that celsius reading is correct (even though it’s in the worst column). I’m starting to think those 2 columns are mixed up. I feel like when people run this on newer Macs they get better info. This is the newest Mac I have..