Comments (12)
Napsty
commented on May 29, 2024
1
So I read through the change which introduced this special pseudo device: https://www.smartmontools.org/ticket/252 .
Confusing because the output suggests that /dev/bus/0 is a real device or a real path but both actually don't apply:
-d megaraid allows to specify devices in pseudo /dev/bus/N format
This is actually handled internally by smartctl and does not refer to a real existing path in the devfs.
However the author of that change (Alex Samorukov) has a good point:
it is possible that drive name is not exists at all (unconfigured RAID)
That's a rare yet real situation which can exist. You may have a couple of disks attached to your megaraid controller but they aren't configured yet. This means there is no logical drive seen by the OS and therefore you can't monitor these drives. Except with this pseudo-device /dev/bus/N.
I will make a change in check_smart to accept thi pseudo-device/path.
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Napsty
commented on May 29, 2024
Can you show the output of ls -la /dev/bus/0 and ls -la /dev/sd*please?
Do you have megacli installed? If yes, it would be interesting to see how the raid was built (e.g. raid-5 between these 5 drives?).
What exactly is behind /dev/sda, /dev/sdb, /dev/sdc? Are these single drives or another raid of other drives or again the megaraid devices?
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greno2
commented on May 29, 2024
thanks for your quick reply.
Server has 2 SSDs (sdb/sdc) as Software-RAID 1 for OS
plus 1 Hardware RAID-6 for data (lvm)
# ls -la /dev/bus/0
ls: cannot access /dev/bus/0: No such file or directory
# ls -la /dev/sd*
brw-rw---- 1 root disk 8, 0 Jun 7 14:11 /dev/sda
brw-rw---- 1 root disk 8, 16 May 31 15:27 /dev/sdb
brw-rw---- 1 root disk 8, 17 May 31 15:27 /dev/sdb1
brw-rw---- 1 root disk 8, 32 May 31 15:27 /dev/sdc
brw-rw---- 1 root disk 8, 33 May 31 15:27 /dev/sdc1
storcli as this is a newer AVAGO MegaRAID SAS 9460-16i:
# /opt/MegaRAID/storcli/storcli64 /c0 show
Generating detailed summary of the adapter, it may take a while to complete.
CLI Version = 007.1017.0000.0000 May 10, 2019
Operating system = Linux 3.10.0-957.12.2.el7.x86_64
Controller = 0
Status = Success
Description = None
Product Name = AVAGO MegaRAID SAS 9460-16i
Serial Number = ***
SAS Address = 500062b204257a40
PCI Address = 00:13:00:00
System Time = 06/07/2019 22:12:39
Mfg. Date = 08/17/18
Controller Time = 06/07/2019 21:12:34
FW Package Build = 50.5.0-1121
BIOS Version = 7.05.02.0_0x07050400
FW Version = 5.050.00-1292
Driver Name = megaraid_sas
Driver Version = 07.705.02.00-rh1
Current Personality = RAID-Mode
Vendor Id = 0x1000
Device Id = 0x14
SubVendor Id = 0x1000
SubDevice Id = 0x9460
Host Interface = PCI-E
Device Interface = SAS-12G
Bus Number = 19
Device Number = 0
Function Number = 0
Drive Groups = 1
TOPOLOGY :
========
-----------------------------------------------------------------------------
DG Arr Row EID:Slot DID Type State BT Size PDC PI SED DS3 FSpace TR
-----------------------------------------------------------------------------
0 - - - - RAID6 Optl N 2.181 TB dsbl N N dflt N N
0 0 - - - RAID6 Optl N 2.181 TB dsbl N N dflt N N
0 0 0 134:0 14 DRIVE Onln N 744.687 GB dsbl N N dflt - N
0 0 1 134:1 15 DRIVE Onln N 744.687 GB dsbl N N dflt - N
0 0 2 134:2 16 DRIVE Onln N 744.687 GB dsbl N N dflt - N
0 0 3 134:3 17 DRIVE Onln N 744.687 GB dsbl N N dflt - N
0 0 4 134:4 18 DRIVE Onln N 744.687 GB dsbl N N dflt - N
-----------------------------------------------------------------------------
DG=Disk Group Index|Arr=Array Index|Row=Row Index|EID=Enclosure Device ID
DID=Device ID|Type=Drive Type|Onln=Online|Rbld=Rebuild|Dgrd=Degraded
Pdgd=Partially degraded|Offln=Offline|BT=Background Task Active
PDC=PD Cache|PI=Protection Info|SED=Self Encrypting Drive|Frgn=Foreign
DS3=Dimmer Switch 3|dflt=Default|Msng=Missing|FSpace=Free Space Present
TR=Transport Ready
Virtual Drives = 1
VD LIST :
=======
--------------------------------------------------------------
DG/VD TYPE State Access Consist Cache Cac sCC Size Name
--------------------------------------------------------------
0/0 RAID6 Optl RW Yes RWBD - ON 2.181 TB Raid6
--------------------------------------------------------------
EID=Enclosure Device ID| VD=Virtual Drive| DG=Drive Group|Rec=Recovery
Cac=CacheCade|OfLn=OffLine|Pdgd=Partially Degraded|Dgrd=Degraded
Optl=Optimal|RO=Read Only|RW=Read Write|HD=Hidden|TRANS=TransportReady|B=Blocked|
Consist=Consistent|R=Read Ahead Always|NR=No Read Ahead|WB=WriteBack|
AWB=Always WriteBack|WT=WriteThrough|C=Cached IO|D=Direct IO|sCC=Scheduled
Check Consistency
Physical Drives = 5
PD LIST :
=======
------------------------------------------------------------------------------
EID:Slt DID State DG Size Intf Med SED PI SeSz Model Sp Type
------------------------------------------------------------------------------
134:0 14 Onln 0 744.687 GB SAS SSD N N 512B SDLL1DLR800GCCA1 U -
134:1 15 Onln 0 744.687 GB SAS SSD N N 512B SDLL1DLR800GCCA1 U -
134:2 16 Onln 0 744.687 GB SAS SSD N N 512B SDLL1DLR800GCCA1 U -
134:3 17 Onln 0 744.687 GB SAS SSD N N 512B SDLL1DLR800GCCA1 U -
134:4 18 Onln 0 744.687 GB SAS SSD N N 512B SDLL1DLR800GCCA1 U -
------------------------------------------------------------------------------
EID=Enclosure Device ID|Slt=Slot No.|DID=Device ID|DG=DriveGroup
DHS=Dedicated Hot Spare|UGood=Unconfigured Good|GHS=Global Hotspare
UBad=Unconfigured Bad|Onln=Online|Offln=Offline|Intf=Interface
Med=Media Type|SED=Self Encryptive Drive|PI=Protection Info
SeSz=Sector Size|Sp=Spun|U=Up|D=Down|T=Transition|F=Foreign
UGUnsp=Unsupported|UGShld=UnConfigured shielded|HSPShld=Hotspare shielded
CFShld=Configured shielded|Cpybck=CopyBack|CBShld=Copyback Shielded
UBUnsp=UBad Unsupported
Cachevault_Info :
===============
------------------------------------
Model State Temp Mode MfgDate
------------------------------------
CVPM05 Optimal 26C - 2018/06/07
------------------------------------
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Napsty
commented on May 29, 2024
What is /dev/sda then? Is this the raid-6 PV for data?
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greno2
commented on May 29, 2024
/dev/sda is RAID6 PV, indeed.
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Napsty
commented on May 29, 2024
Did you already try ./check_smart.pl -d /dev/sda -i megaraid,1 ?
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greno2
commented on May 29, 2024
That would work but as we're rolling out nrpe-checks by puppet (based on smartctl --scan) automatically for each physical disk we don't know the direct relation between /dev/bus/0 (retrieved by smartctl --scan) and /dev/sda)
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Napsty
commented on May 29, 2024
The --scan output is wrong or gives confusing data. The correct approach is to call the real block device (/dev/sda) and use the adapter position behind the block device.
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greno2
commented on May 29, 2024
why wrong/confusing? It just works without guessing the correct blockdevice and returns the same results ...
Seems intended behaviour:
(man smartctl)
megaraid,N - [Linux only] the device consists of one or more SCSI/SAS disks connected to a MegaRAID controller. The non-negative integer N (in the range of 0 to 127 inclusive) denotes which disk on the controller is monitored. Use syntax such as:
smartctl -a -d megaraid,2 /dev/sda
smartctl -a -d megaraid,0 /dev/sdb
smartctl -a -d megaraid,0 /dev/bus/0
This interface will also work for Dell PERC controllers. It is possible to set RAID device name as /dev/bus/N, where N is a SCSI bus number.
The following entry in /proc/devices must exist:
For PERC2/3/4 controllers: megadevN
For PERC5/6 controllers: megaraid_sas_ioctlN
# smartctl --scan
/dev/sda -d scsi # /dev/sda, SCSI device
/dev/sdb -d scsi # /dev/sdb, SCSI device
/dev/sdc -d scsi # /dev/sdc, SCSI device
/dev/bus/0 -d megaraid,14 # /dev/bus/0 [megaraid_disk_14], SCSI device
/dev/bus/0 -d megaraid,15 # /dev/bus/0 [megaraid_disk_15], SCSI device
/dev/bus/0 -d megaraid,16 # /dev/bus/0 [megaraid_disk_16], SCSI device
/dev/bus/0 -d megaraid,17 # /dev/bus/0 [megaraid_disk_17], SCSI device
/dev/bus/0 -d megaraid,18 # /dev/bus/0 [megaraid_disk_18], SCSI device
# smartctl -a /dev/bus/0 -d megaraid,14
smartctl 6.5 2016-05-07 r4318 [x86_64-linux-3.10.0-957.12.2.el7.x86_64] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Vendor: HGST
Product: SDLL1DLR800GCCA1
Revision: Y150
Compliance: SPC-4
User Capacity: 800,166,076,416 bytes [800 GB]
Logical block size: 512 bytes
Physical block size: 4096 bytes
LU is resource provisioned, LBPRZ=1
Rotation Rate: Solid State Device
Form Factor: 2.5 inches
Logical Unit id: 0x5001173101846b40
Serial number: A0469CEF
Device type: disk
Transport protocol: SAS (SPL-3)
Local Time is: Sat Jun 8 19:58:43 2019 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
Temperature Warning: Enabled
=== START OF READ SMART DATA SECTION ===
SMART Health Status: OK
Percentage used endurance indicator: 0%
Current Drive Temperature: 37 C
Drive Trip Temperature: 70 C
Manufactured in week 12 of year 2018
Specified cycle count over device lifetime: 0
Accumulated start-stop cycles: 526
Elements in grown defect list: 0
Error counter log:
Errors Corrected by Total Correction Gigabytes Total
ECC rereads/ errors algorithm processed uncorrected
fast | delayed rewrites corrected invocations [10^9 bytes] errors
read: 0 0 0 0 0 29090.359 0
write: 0 0 0 0 0 1819.224 0
verify: 0 0 0 0 0 0.034 0
Non-medium error count: 228
No self-tests have been logged
# smartctl -a /dev/sda -d megaraid,14
smartctl 6.5 2016-05-07 r4318 [x86_64-linux-3.10.0-957.12.2.el7.x86_64] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Vendor: HGST
Product: SDLL1DLR800GCCA1
Revision: Y150
Compliance: SPC-4
User Capacity: 800,166,076,416 bytes [800 GB]
Logical block size: 512 bytes
Physical block size: 4096 bytes
LU is resource provisioned, LBPRZ=1
Rotation Rate: Solid State Device
Form Factor: 2.5 inches
Logical Unit id: 0x5001173101846b40
Serial number: A0469CEF
Device type: disk
Transport protocol: SAS (SPL-3)
Local Time is: Sat Jun 8 19:58:51 2019 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
Temperature Warning: Enabled
=== START OF READ SMART DATA SECTION ===
SMART Health Status: OK
Percentage used endurance indicator: 0%
Current Drive Temperature: 37 C
Drive Trip Temperature: 70 C
Manufactured in week 12 of year 2018
Specified cycle count over device lifetime: 0
Accumulated start-stop cycles: 526
Elements in grown defect list: 0
Error counter log:
Errors Corrected by Total Correction Gigabytes Total
ECC rereads/ errors algorithm processed uncorrected
fast | delayed rewrites corrected invocations [10^9 bytes] errors
read: 0 0 0 0 0 29090.359 0
write: 0 0 0 0 0 1819.224 0
verify: 0 0 0 0 0 0.034 0
Non-medium error count: 228
No self-tests have been logged
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Napsty
commented on May 29, 2024
I'm doing some research concerning this and will get back to you.
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Napsty
commented on May 29, 2024
@greno2 Could you please test #38 (https://raw.githubusercontent.com/Napsty/check_smart/pseudo-bus-device/check_smart.pl) before I merge into master? Thx
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greno2
commented on May 29, 2024
Works like a charm. Thanks for your quick support.
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