smartctl -l scttemp output question

[tfran1990]

when i run this command what does the ( X skipped) mean?
im guessing it skips outputing the temperature if its the same X times in a row.

Code:

root@freenas:~ # smartctl -l scttemp /dev/ada4
smartctl 6.6 2017-11-05 r4594 [FreeBSD 11.1-STABLE amd64] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SCT Status Version:                  3
SCT Version (vendor specific):       522 (0x020a)
SCT Support Level:                   1
Device State:                        Active (0)
Current Temperature:                    34 Celsius
Power Cycle Min/Max Temperature:     23/36 Celsius
Lifetime    Min/Max Temperature:     20/43 Celsius
Under/Over Temperature Limit Count:   0/0

SCT Temperature History Version:     2
Temperature Sampling Period:         1 minute
Temperature Logging Interval:        94 minutes
Min/Max recommended Temperature:      1/61 Celsius
Min/Max Temperature Limit:            2/60 Celsius
Temperature History Size (Index):    128 (29)

Index    Estimated Time   Temperature Celsius
  30    2019-03-20 14:16    31  ************
  31    2019-03-20 15:50    32  *************
  32    2019-03-20 17:24    32  *************
  33    2019-03-20 18:58    33  **************
  34    2019-03-20 20:32    33  **************
  35    2019-03-20 22:06    34  ***************
 ...    ..(  2 skipped).    ..  ***************
  38    2019-03-21 02:48    34  ***************
  39    2019-03-21 04:22    33  **************
  40    2019-03-21 05:56    33  **************
  41    2019-03-21 07:30    33  **************
  42    2019-03-21 09:04    32  *************
  43    2019-03-21 10:38    33  **************
  44    2019-03-21 12:12    32  *************
  45    2019-03-21 13:46    32  *************
  46    2019-03-21 15:20    33  **************
  47    2019-03-21 16:54    33  **************
  48    2019-03-21 18:28    34  ***************
  49    2019-03-21 20:02    34  ***************
  50    2019-03-21 21:36    35  ****************
  51    2019-03-21 23:10    35  ****************
  52    2019-03-22 00:44    34  ***************
  53    2019-03-22 02:18    34  ***************
  54    2019-03-22 03:52    33  **************
  55    2019-03-22 05:26    33  **************
  56    2019-03-22 07:00    32  *************
 ...    ..(  3 skipped).    ..  *************
  60    2019-03-22 13:16    32  *************
  61    2019-03-22 14:50    33  **************
  62    2019-03-22 16:24    33  **************
  63    2019-03-22 17:58    34  ***************
  64    2019-03-22 19:32    35  ****************
 ...    ..(  3 skipped).    ..  ****************
  68    2019-03-23 01:48    35  ****************
  69    2019-03-23 03:22    34  ***************
  70    2019-03-23 04:56    33  **************
  71    2019-03-23 06:30    33  **************
  72    2019-03-23 08:04    32  *************
  73    2019-03-23 09:38    32  *************
  74    2019-03-23 11:12    31  ************
  75    2019-03-23 12:46    32  *************
 ...    ..(  2 skipped).    ..  *************
  78    2019-03-23 17:28    32  *************
  79    2019-03-23 19:02    33  **************
 ...    ..(  6 skipped).    ..  **************
  86    2019-03-24 06:00    33  **************
  87    2019-03-24 07:34    32  *************
 ...    ..(  2 skipped).    ..  *************
  90    2019-03-24 12:16    32  *************
  91    2019-03-24 13:50    33  **************
  92    2019-03-24 15:24    33  **************
  93    2019-03-24 16:58    34  ***************
  94    2019-03-24 18:32    34  ***************
  95    2019-03-24 20:06    34  ***************
  96    2019-03-24 21:40    32  *************
  97    2019-03-24 23:14    32  *************
  98    2019-03-25 00:48    33  **************
  99    2019-03-25 02:22    32  *************
 100    2019-03-25 03:56    33  **************
 101    2019-03-25 05:30    33  **************
 102    2019-03-25 07:04    33  **************
 103    2019-03-25 08:38    34  ***************
 ...    ..(  3 skipped).    ..  ***************
 107    2019-03-25 14:54    34  ***************
 108    2019-03-25 16:28    35  ****************
 109    2019-03-25 18:02    35  ****************
 110    2019-03-25 19:36    36  *****************
 111    2019-03-25 21:10    34  ***************
 112    2019-03-25 22:44    33  **************
 113    2019-03-26 00:18    33  **************
 114    2019-03-26 01:52    34  ***************

 

[Chris Moore]

when i run this command what does the ( X skipped) mean?
im guessing it skips outputing the temperature if its the same X times in a row.

It means the ones that were skipped were all the same. If there is no change, it saves memory by not making an additional record.

 

[Ericloewe]

I think it just saves output lines, but yeah, they're unchanged.

 

[tfran1990]

lets say for years and years i run disc commands to check on the system, is there a log file that the terminal writes to?

It would be a good idea to delete the log file once in a while.
or does the file cap and over write itself?

 

[Chris Moore]

The results of the smartctl -x are pulled from the internal storage of the drive. It only holds a predefined amount of data and overwrites as needed.
The system log in FreeNAS is stored on disk, and also overwrites itself as needed.