smartctl false positives

[KenNashua]

I have a old Kingston 64GB SSD drive that I'm using as my boot device.

Everything runs fine, except that one of the SMART tests trigger alerts continuously, which I believe is a false-positive.

Code:

CRITICAL: 		 	 	 	Oct. 6, 2018, 6:02 a.m. - Device: /dev/ada0, Failed SMART usage Attribute: 194 Temperature_Celsius.

Here's the attribute block:

Code:

SMART Attributes Data Structure revision number: 16
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 Unknown_JMF_Attribute   0x0007   100   100   050	Pre-fail  Always	   -	   0
  5 Reallocated_Sector_Ct   0x0013   100   100   050	Pre-fail  Always	   -	   0
  7 Unknown_JMF_Attribute   0x000b   100   100   050	Pre-fail  Always	   -	   0
  8 Unknown_JMF_Attribute   0x0005   100   100   050	Pre-fail  Offline	  -	   0
  9 Power_On_Hours		  0x0012   100   100   000	Old_age   Always	   -	   12607
 10 Unknown_JMF_Attribute   0x0013   100   100   050	Pre-fail  Always	   -	   0
 12 Power_Cycle_Count	   0x0012   100   100   000	Old_age   Always	   -	   942
167 Unknown_JMF_Attribute   0x0022   100   100   000	Old_age   Always	   -	   0
168 SATA_Phy_Error_Count	0x0012   100   100   000	Old_age   Always	   -	   0
169 Unknown_JMF_Attribute   0x0013   100   100   010	Pre-fail  Always	   -	   0
173 Erase_Count			 0x0012   200   200   000	Old_age   Always	   -	   0 0 0
175 Bad_Cluster_Table_Count 0x0013   100   100   010	Pre-fail  Always	   -	   0
192 Unexpect_Power_Loss_Ct  0x0012   100   100   000	Old_age   Always	   -	   0
194 Temperature_Celsius	 0x0023   035   035   030	Pre-fail  Always	   -	   35 (Min/Max 27/40)
197 Current_Pending_Sector  0x0012   100   100   000	Old_age   Always	   -	   0
240 Unknown_JMF_Attribute   0x0013   100   100   050	Pre-fail  Always	   -	   0

Normally, I believe I could edit /usr/local/etc/smartd.conf to ignore the attribute for that drive, but since this is auto-generated, is there anything that will allow me to override this attribute?

 

[m0nkey_]

No, you cannot override it, however you can prevent smartd from monitoring the device.

http://doc.freenas.org/11/storage.html#view-disks

 

[KenNashua]

No, you cannot override it, however you can prevent smartd from monitoring the device.

http://doc.freenas.org/11/storage.html#view-disks

I was hoping for a middle ground...

 

[m0nkey_]

You could try filing a bug report at https://redmine.ixsystems.com providing as much info as possible. This then may be fixed in an upcoming release in FreeNAS.

 

[titan_rw]

No, you cannot override it, however you can prevent smartd from monitoring the device.

http://doc.freenas.org/11/storage.html#view-disks

Theoretically you can. I haven't tested it, but the functionality exists.

Looking at the docs for smartd.conf, it looks like -i is used for this:

Code:

-i ID  Ignore device Attribute number ID when checking for failure of
			 Usage Attributes.  ID must be a decimal integer in the range from
			 1 to 255.  This Directive modifies the behavior of the ´-f´
			 Directive and has no effect without it.

			 This is useful, for example, if you have a very old disk and don´t
			 want to keep getting messages about the hours-on-lifetime
			 Attribute (usually Attribute 9) failing.  This Directive may
			 appear multiple times for a single device, if you want to ignore
			 multiple Attributes.

Freenas supports adding additional user supplied directives to each drive under the 'smart extra options' section under 'storage - view disks - edit disk in question'. If you add "-i 194", freenas should add that directive to the conf file when it generates it.

I tested it, and it seemed to 'do the right thing' in the config. I added -i 194 to da0, and it did this to the config:

Code:

/dev/da1 -a -n never -W 5,35,45 -m me@here.com -M exec /usr/local/www/freenasUI/tools/smart_alert.py\
-s L/(01|02|03|04|05|06|07|08|09|10|11|12)/(07|21)/(1|2|3|4|5|6|7)/(02)\

/dev/da0 -a -n never -W 5,35,45 -m me@here.com -M exec /usr/local/www/freenasUI/tools/smart_alert.py\
-s L/(01|02|03|04|05|06|07|08|09|10|11|12)/(07|21)/(1|2|3|4|5|6|7)/(02)\
 -i 194
/dev/da8 -a -n never -W 5,35,45 -m me@here.com -M exec /usr/local/www/freenasUI/tools/smart_alert.py\
-s L/(01|02|03|04|05|06|07|08|09|10|11|12)/(07|21)/(1|2|3|4|5|6|7)/(02)\

Maybe try that?

 

[pro lamer]

I believe is a false-positive.

Is the reason the threshold being 30 centigrade? Is it the drive's firmware bug?

What if the temperature increases above some critical level? (ie a level dangerous to the drive)

Sent from my mobile phone

 

[KenNashua]

Theoretically you can. I haven't tested it, but the functionality exists.

Freenas supports adding additional user supplied directives to each drive under the 'smart extra options' section under 'storage - view disks - edit disk in question'. If you add "-i 194", freenas should add that directive to the conf file when it generates it.

Thanks! That's exactly what I was looking for. I looked for options under the SMART cron tasks but didn't think to look there.

 

[MikeyG]

Were you ever able to get this to work? I'm trying to ignore attribute 197 with -i 197 and -I 197 and not getting anywhere.

 

[KenNashua]

@mgittelman , it works exactly as @titan_rw indicated:

Go to storage/disks and edit the disk in question. There's S.M.A.R.T. extra options. In your case you'd want to set it to -i 197.

You might need to restart the S.M.A.R.T. service from the Services menu or reboot.

 

[MikeyG]

Thanks @KenNashua I have done exactly that and it did not help.