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[input.smart]: Specifying multiple drives in the devices= parameter fails when the '-d' parameter is used to differentiate drives within a hardware RAID array #8684

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#10150
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[input.smart]: Specifying multiple drives in the devices= parameter fails when the '-d' parameter is used to differentiate drives within a hardware RAID array#8684
#10150
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area/smartbugunexpected problem or unintended behavior
@douginoz

Description

@douginoz
douginoz
opened on Jan 13, 2021

Relevant telegraf.conf:

[[inputs.smart]]
path_smartctl = "/usr/sbin/smartctl"
path_nvme = "/usr/sbin/nvme"
enable_extensions = ["auto-on"]
use_sudo = true
attributes = true
#
#  List all 24 drives within the Areca RAID controller:
devices = [ "dev/sg3 -d areca,2/2", "/dev/sg3 -d areca,3/2"]
#
#  Note that the above was concatenated for brevity.  The remainder of that line is below for all drives:
#, "/dev/sg3 -d areca,3/2", "/dev/sg3 -d areca,4/2", "/dev/sg3 -d areca,5/2", "/dev/sg3 -d areca,6/2", "/dev/sg3 -d areca,7/2", "/dev/sg3 -d areca,8/2", "/dev/sg3 -d areca,9/2", "/dev/sg3 -d areca,10/2", "/dev/sg3 -d areca,11/2", "/dev/sg3 -d areca,12/2", "/dev/sg3 -d areca,13/2", "/dev/sg3 -d areca,14/2", "/dev/sg3 -d areca,15/2", "/dev/sg3 ->

System info:

Telegraf 1.17.0 (git: HEAD 3f7a54c)
Linux sophie 5.4.0-58-generic #64-Ubuntu SMP (Ubuntu 20.04)
smartmontools release 7.1 dated 2019-12-30 at 15:00:11 UTC
smartmontools SVN rev 5022 dated 2019-12-30 at 15:00:49
smartmontools build host: x86_64-pc-linux-gnu

Docker

Docker not being used.

Steps to reproduce:

  1. Trying to specify the individual drives within the Areca RAID array from within the [input.smart] section of telegraf.conf fails
  2. Any one of the following lines works:
devices = [ "/dev/sg3 -d areca,2/2" ]             # A single drive from the Areca array, indicated via 'areca,2/2'
devices = [ "/dev/sg3 -d areca,7/2" ]           # A different drive from the Areca array - 'areca 7/2'
devices = [ "/dev/sg3 -d areca,1/2", "/dev/sdd" ]   # Multiple drives, so long as only one is from the Areca array
devices = [ "/dev/sdd", "/dev/sdd"]                # Duplicating the same non-Areca drive seems to work without error
  1. But the following doesn't work:
    devices = [ "/dev/sg3 -d areca,2/2", "/dev/sg3 -d areca,3/2" ] # Two drives from within the Areca array

Expected behaviour:

Smartctl can retrieve data from individual drives within a hardware array provided the '--device=' parameter is correct.
For Areca arrays, the following is correct syntax:

smartctl --info --health --attributes --tolerance=verypermissive -n standby --format=brief --device=areca,1/2 /dev/sg3

This returns comprehensive data about the specific drive within the array:

root@sophie:/etc/telegraf# smartctl --info --health --attributes --tolerance=verypermissive -n standby --format=brief --device=areca,1/2 /dev/sg3
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-58-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     HGST HDN721010ALE604
Serial Number:    1SJS3J5Z
LU WWN Device Id: 5 000cca 26be6b0c3
Firmware Version: 83XN
User Capacity:    10,000,831,348,736 bytes [10.0 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Wed Jan 13 01:13:50 2021 PST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
Power mode is:    ACTIVE or IDLE

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  1 Raw_Read_Error_Rate     PO-R--   100   100   016    -    0
  2 Throughput_Performance  --S---   135   135   054    -    92
  3 Spin_Up_Time            POS---   175   175   024    -    406 (Average 344)
  4 Start_Stop_Count        -O--C-   100   100   000    -    99
  5 Reallocated_Sector_Ct   PO--CK   100   100   005    -    0
  7 Seek_Error_Rate         -O-R--   100   100   067    -    0
  8 Seek_Time_Performance   --S---   128   128   020    -    18
  9 Power_On_Hours          -O--C-   098   098   000    -    16232
 10 Spin_Retry_Count        -O--C-   100   100   060    -    0
 12 Power_Cycle_Count       -O--CK   100   100   000    -    99
 22 Unknown_Attribute       PO---K   100   100   025    -    100
192 Power-Off_Retract_Count -O--CK   100   100   000    -    823
193 Load_Cycle_Count        -O--C-   100   100   000    -    823
194 Temperature_Celsius     -O----   166   166   000    -    36 (Min/Max 17/59)
196 Reallocated_Event_Count -O--CK   100   100   000    -    0
197 Current_Pending_Sector  -O---K   100   100   000    -    0
198 Offline_Uncorrectable   ---R--   100   100   000    -    0
199 UDMA_CRC_Error_Count    -O-R--   200   200   000    -    0

When a different value is used, Smartctl correctly retrieves the data for the different disk within the array:

root@sophie:/etc/telegraf# smartctl --info --health --attributes --tolerance=verypermissive -n standby --format=brief --device=areca,7/2 /dev/sg3
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-58-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     HGST HDN721010ALE604
Serial Number:    1SJTUGKZ
LU WWN Device Id: 5 000cca 26be77786
Firmware Version: 83XN
User Capacity:    10,000,831,348,736 bytes [10.0 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Wed Jan 13 01:14:54 2021 PST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
Power mode is:    ACTIVE or IDLE

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  1 Raw_Read_Error_Rate     PO-R--   100   100   016    -    0
  2 Throughput_Performance  --S---   134   134   054    -    96
  3 Spin_Up_Time            POS---   178   178   024    -    316 (Average 424)
  4 Start_Stop_Count        -O--C-   100   100   000    -    109
  5 Reallocated_Sector_Ct   PO--CK   100   100   005    -    0
  7 Seek_Error_Rate         -O-R--   100   100   067    -    0
  8 Seek_Time_Performance   --S---   128   128   020    -    18
  9 Power_On_Hours          -O--C-   098   098   000    -    20286
 10 Spin_Retry_Count        -O--C-   100   100   060    -    0
 12 Power_Cycle_Count       -O--CK   100   100   000    -    109
 22 Unknown_Attribute       PO---K   100   100   025    -    100
192 Power-Off_Retract_Count -O--CK   100   100   000    -    1020
193 Load_Cycle_Count        -O--C-   100   100   000    -    1020
194 Temperature_Celsius     -O----   166   166   000    -    36 (Min/Max 16/62)
196 Reallocated_Event_Count -O--CK   100   100   000    -    0
197 Current_Pending_Sector  -O---K   100   100   000    -    0
198 Offline_Uncorrectable   ---R--   100   100   000    -    0
199 UDMA_CRC_Error_Count    -O-R--   200   200   000    -    0

The [input.smart] plugin allows for specifying device and device type:

#   ## Optionally specify devices and device type, if unset
#   ## a scan (smartctl --scan and smartctl --scan -d nvme) for S.M.A.R.T. devices will be done
#   ## and all found will be included except for the excluded in excludes.
#   # devices = [ "/dev/ada0 -d atacam", "/dev/nvme0"]
devices = [ "/dev/sg3 -d areca,12/2" ]

The above works correctly:

root@sophie:/etc/telegraf# nano telegraf.conf
root@sophie:/etc/telegraf# telegraf  --test| grep smart
2021-01-13T09:17:43Z I! Starting Telegraf 1.17.0
2021-01-13T09:17:43Z I! Using config file: /etc/telegraf/telegraf.conf
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=POSR--,host=sophie,id=1,model=ST10000NM0086-2AA101,name=Raw_Read_Error_Rate,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=344184i,threshold=44i,value=100i,worst=64i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=PO----,host=sophie,id=3,model=ST10000NM0086-2AA101,name=Spin_Up_Time,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=0i,threshold=0i,value=93i,worst=92i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--CK,host=sophie,id=4,model=ST10000NM0086-2AA101,name=Start_Stop_Count,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=51i,threshold=20i,value=100i,worst=100i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=PO--CK,host=sophie,id=5,model=ST10000NM0086-2AA101,name=Reallocated_Sector_Ct,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=48i,threshold=10i,value=100i,worst=100i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=POSR--,host=sophie,id=7,model=ST10000NM0086-2AA101,name=Seek_Error_Rate,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=427333388i,threshold=45i,value=86i,worst=60i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--CK,host=sophie,id=9,model=ST10000NM0086-2AA101,name=Power_On_Hours,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=13568i,threshold=0i,value=85i,worst=85i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=PO--C-,host=sophie,id=10,model=ST10000NM0086-2AA101,name=Spin_Retry_Count,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=0i,threshold=97i,value=100i,worst=100i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--CK,host=sophie,id=12,model=ST10000NM0086-2AA101,name=Power_Cycle_Count,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=53i,threshold=20i,value=100i,worst=100i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--CK,host=sophie,id=184,model=ST10000NM0086-2AA101,name=End-to-End_Error,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=0i,threshold=99i,value=100i,worst=100i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--CK,host=sophie,id=187,model=ST10000NM0086-2AA101,name=Reported_Uncorrect,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=0i,threshold=0i,value=100i,worst=100i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--CK,host=sophie,id=188,model=ST10000NM0086-2AA101,name=Command_Timeout,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=0i,threshold=0i,value=100i,worst=100i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O-RCK,host=sophie,id=189,model=ST10000NM0086-2AA101,name=High_Fly_Writes,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=68i,threshold=0i,value=32i,worst=32i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=Past,flags=-O---K,host=sophie,id=190,model=ST10000NM0086-2AA101,name=Airflow_Temperature_Cel,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=35i,threshold=40i,value=65i,worst=39i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--CK,host=sophie,id=191,model=ST10000NM0086-2AA101,name=G-Sense_Error_Rate,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=11417i,threshold=0i,value=95i,worst=95i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--CK,host=sophie,id=192,model=ST10000NM0086-2AA101,name=Power-Off_Retract_Count,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=555i,threshold=0i,value=100i,worst=100i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--CK,host=sophie,id=193,model=ST10000NM0086-2AA101,name=Load_Cycle_Count,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=605i,threshold=0i,value=100i,worst=100i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O---K,host=sophie,id=194,model=ST10000NM0086-2AA101,name=Temperature_Celsius,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=35i,threshold=0i,value=35i,worst=61i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O-RC-,host=sophie,id=195,model=ST10000NM0086-2AA101,name=Hardware_ECC_Recovered,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=344184i,threshold=0i,value=100i,worst=64i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--C-,host=sophie,id=197,model=ST10000NM0086-2AA101,name=Current_Pending_Sector,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=0i,threshold=0i,value=100i,worst=100i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=----C-,host=sophie,id=198,model=ST10000NM0086-2AA101,name=Offline_Uncorrectable,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=0i,threshold=0i,value=100i,worst=100i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-OSRCK,host=sophie,id=199,model=ST10000NM0086-2AA101,name=UDMA_CRC_Error_Count,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=0i,threshold=0i,value=200i,worst=200i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=PO---K,host=sophie,id=200,model=ST10000NM0086-2AA101,name=Multi_Zone_Error_Rate,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=0i,threshold=1i,value=100i,worst=100i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=------,host=sophie,id=240,model=ST10000NM0086-2AA101,name=Head_Flying_Hours,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=48344677i,threshold=0i,value=100i,worst=253i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=------,host=sophie,id=241,model=ST10000NM0086-2AA101,name=Total_LBAs_Written,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=140759859579i,threshold=0i,value=100i,worst=253i 1610529464000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=------,host=sophie,id=242,model=ST10000NM0086-2AA101,name=Total_LBAs_Read,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,raw_value=399844847220i,threshold=0i,value=100i,worst=253i 1610529464000000000
> smart_device,capacity=10000831348736,device=sg3,enabled=Enabled,host=sophie,model=ST10000NM0086-2AA101,serial_no=ZA29PM9W,wwn=5000c500b375b078 exit_status=32i,health_ok=true,read_error_rate=344184i,seek_error_rate=427333388i,temp_c=35i,udma_crc_errors=0i 1610529464000000000

As do any of the examples previously documented above.
However, the following doesn't work:

devices = [ "/dev/sg3 -d areca,1/2", "/dev/sg3 -d areca,7/2" ]

Actual behavior:

The following is the output from specifying more than one drive within the areca array:

root@sophie:/etc/telegraf# telegraf  --test| grep smart
2021-01-13T09:20:36Z I! Starting Telegraf 1.17.0
2021-01-13T09:20:36Z I! Using config file: /etc/telegraf/telegraf.conf
> smart_device,device=sg3,host=sophie exit_status=2i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=PO-R--,host=sophie,id=1,model=HGST\ HDN721010ALE604,name=Raw_Read_Error_Rate,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=0i,threshold=16i,value=100i,worst=100i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=--S---,host=sophie,id=2,model=HGST\ HDN721010ALE604,name=Throughput_Performance,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=92i,threshold=54i,value=135i,worst=135i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=POS---,host=sophie,id=3,model=HGST\ HDN721010ALE604,name=Spin_Up_Time,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=406i,threshold=24i,value=175i,worst=175i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--C-,host=sophie,id=4,model=HGST\ HDN721010ALE604,name=Start_Stop_Count,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=99i,threshold=0i,value=100i,worst=100i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=PO--CK,host=sophie,id=5,model=HGST\ HDN721010ALE604,name=Reallocated_Sector_Ct,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=0i,threshold=5i,value=100i,worst=100i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O-R--,host=sophie,id=7,model=HGST\ HDN721010ALE604,name=Seek_Error_Rate,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=0i,threshold=67i,value=100i,worst=100i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=--S---,host=sophie,id=8,model=HGST\ HDN721010ALE604,name=Seek_Time_Performance,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=18i,threshold=20i,value=128i,worst=128i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--C-,host=sophie,id=9,model=HGST\ HDN721010ALE604,name=Power_On_Hours,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=16232i,threshold=0i,value=98i,worst=98i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--C-,host=sophie,id=10,model=HGST\ HDN721010ALE604,name=Spin_Retry_Count,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=0i,threshold=60i,value=100i,worst=100i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--CK,host=sophie,id=12,model=HGST\ HDN721010ALE604,name=Power_Cycle_Count,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=99i,threshold=0i,value=100i,worst=100i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=PO---K,host=sophie,id=22,model=HGST\ HDN721010ALE604,name=Unknown_Attribute,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=100i,threshold=25i,value=100i,worst=100i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--CK,host=sophie,id=192,model=HGST\ HDN721010ALE604,name=Power-Off_Retract_Count,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=823i,threshold=0i,value=100i,worst=100i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--C-,host=sophie,id=193,model=HGST\ HDN721010ALE604,name=Load_Cycle_Count,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=823i,threshold=0i,value=100i,worst=100i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O----,host=sophie,id=194,model=HGST\ HDN721010ALE604,name=Temperature_Celsius,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=36i,threshold=0i,value=166i,worst=166i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O--CK,host=sophie,id=196,model=HGST\ HDN721010ALE604,name=Reallocated_Event_Count,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=0i,threshold=0i,value=100i,worst=100i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O---K,host=sophie,id=197,model=HGST\ HDN721010ALE604,name=Current_Pending_Sector,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=0i,threshold=0i,value=100i,worst=100i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=---R--,host=sophie,id=198,model=HGST\ HDN721010ALE604,name=Offline_Uncorrectable,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=0i,threshold=0i,value=100i,worst=100i 1610529637000000000
> smart_attribute,capacity=10000831348736,device=sg3,enabled=Enabled,fail=-,flags=-O-R--,host=sophie,id=199,model=HGST\ HDN721010ALE604,name=UDMA_CRC_Error_Count,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,raw_value=0i,threshold=0i,value=200i,worst=200i 1610529637000000000
> smart_device,capacity=10000831348736,device=sg3,enabled=Enabled,host=sophie,model=HGST\ HDN721010ALE604,serial_no=1SJS3J5Z,wwn=5000cca26be6b0c3 exit_status=0i,health_ok=true,read_error_rate=0i,seek_error_rate=0i,temp_c=36i,udma_crc_errors=0i 1610529637000000000

Only the first drive gets reported on. Any subsequent drives within that same array don't, with only the 'exit_status=2i" message returned.

Strangely, the following works:
devices = [ "/dev/sdf", "/dev/sdf", "/dev/sdf", "/dev/sdf" ]
so it doesn't appear to be a problem with handling duplicate drives.

Additional info:

Issue #4720 was logged by @sachaz Sept 19,2018 which was identical, except he was using an HP smart array instead of an Areca, but the principle is the same - you must use the '-d' parameter to specify individual drives within the array.

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    area/smartbugunexpected problem or unintended behavior

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