S.M.A.R.T. info

S.M.A.R.T. info CLI Reference

S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) is a monitoring system built into modern storage drives. It lets you read diagnostics of the drive: overall health, temperature, use, error counters and, for NVMe drives, the SMART/Health attributes.

info

S.M.A.R.T. information requires the Storage package.

For any attached storage device that supports S.M.A.R.T., read the diagnostics with the /disk/smart-info command:

[admin@MikroTik] > /disk/smart-info nvme1

[admin@R2DUTRDS22162XG4S4XS2XQ20DISKS] > disk/smart-info nvme1
Columns: OUTPUT
OUTPUT                                                                     
smartctl 7.1 2019-12-30 r5022 [aarch64-linux-5.6.3] (local build)          
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===                                       
Model Number:                       U.2 SSD 4TG2-P                         
Serial Number:                      <S/N>                      
Firmware Version:                   E21T4C                                 
PCI Vendor/Subsystem ID:            0x1bc0                                 
IEEE OUI Identifier:                0x24693e                               
Controller ID:                      0                                      
Number of Namespaces:               1                                      
Namespace 1 Size/Capacity:          960,197,124,096 [960 GB]               
Namespace 1 Formatted LBA Size:     512                                    
Namespace 1 IEEE EUI-64:            <EUI-64>                  
Firmware Updates (0x02):            1 Slot                                 
Optional Admin Commands (0x0017):   Security Format Frmw_DL Self_Test      
Optional NVM Commands (0x0054):     DS_Mngmt Sav/Sel_Feat Timestmp         
Maximum Data Transfer Size:         512 Pages                              
Warning  Comp. Temp. Threshold:     100 Celsius                            
Critical Comp. Temp. Threshold:     110 Celsius                            
Supported Power States                                                     
St Op     Max   Active     Idle   RL RT WL WT  Ent_Lat  Ex_Lat             
 0 +    20.00W       -        -    0  0  0  0        5       5             
Supported LBA Sizes (NSID 0x1)                                             
Id Fmt  Data  Metadt  Rel_Perf                                             
 0 +     512       0         0                                             
=== START OF SMART DATA SECTION ===                                        
SMART overall-health self-assessment test result: PASSED                   
SMART/Health Information (NVMe Log 0x02)                                   
Critical Warning:                   0x00                                   
Temperature:                        33 Celsius                             
Available Spare:                    100%                                   
Available Spare Threshold:          10%                                    
Percentage Used:                    0%                                     
Data Units Read:                    5,774,165 [2.95 TB]                    
Data Units Written:                 10,770,860 [5.51 TB]                   
Host Read Commands:                 75,868,764                             
Host Write Commands:                61,379,337                             
Controller Busy Time:               22                                     
Power Cycles:                       579                                    
Power On Hours:                     4,203                                  
Unsafe Shutdowns:                   105                                    
Media and Data Integrity Errors:    0                                      
Error Information Log Entries:      0                                      
Warning  Comp. Temperature Time:    0                                      
Critical Comp. Temperature Time:    0                                      
Temperature Sensor 1:               45 Celsius                             
Temperature Sensor 2:               33 Celsius                             
Temperature Sensor 3:               33 Celsius                             
Temperature Sensor 4:               34 Celsius                             
Temperature Sensor 5:               34 Celsius                             
Temperature Sensor 6:               35 Celsius                             
Temperature Sensor 7:               32 Celsius                             
Temperature Sensor 8:               31 Celsius                             
Error Information (NVMe Log 0x01, max 64 entries)                          
No Errors Logged      

Reading the output

The important values for drive health:

• SMART overall-health self-assessment test result - the drive reports whether it considers itself healthy. A drive that reports FAILED should be replaced.
• Temperature - the current temperature of the drive. The warning and critical thresholds are listed in the information section.
• Available Spare - how much spare capacity the drive still has before it cannot remap bad blocks. When it drops to the Available Spare Threshold, the drive is close to the end of its life.
• Percentage Used - the estimated lifetime use of the drive, based on the manufacturer's rated endurance. At 100% the drive has reached its rated lifespan.
• Unsafe Shutdowns and Media and Data Integrity Errors - how often the drive lost power unexpectedly and how many data errors it detected. Repeated unsafe shutdowns increase the risk of corruption.

The output is the same as smartctl reports on Linux, so the S.M.A.R.T. documentation of the drive vendor applies.

note

Some USB enclosures cannot pass S.M.A.R.T. information through. If the drive is behind such an enclosure, /disk/smart-info reports an error even though the drive itself supports S.M.A.R.T.

Related

• Disks - formatting, mounting and managing drives.