getting a mail about smartctl not able to read a raided drive's sector, but array is healthy in raid controller settings

[JurgenMK]

so, to sketch my setup, a raid 5 array which is controlled by a H700 has one drive of which smartd says it has a bad sector, but when I scan the array in the controller's settings, it shows healthy. The array only contains backups. What notification should I believe?

   host name:  pve2
   DNS domain: local

The following warning/error was logged by the smartd daemon:

Device: /dev/bus/0 [megaraid_disk_00] [SAT], 1 Currently unreadable (pending) sectors

Device info:
WDC WD20EFRX-68EUZN0, S/N:WD-WCC4M*******, WWN:5-0014ee-21*******, FW:82.00A82, 2.00 TB

any help would be greatly appreciated.

kind Regards,
Jurgen

 

[LnxBil]

SMART-Status und "healthy" are two different metrics. You may have to manually look at the errors counter with megacli (or whatever version you've installed) and check for non-zero error counters. We had many pre-disk-failures with "other errors" that took a couple of months to "evolve" into media errors.

 

[JurgenMK]

SMART-Status und "healthy" are two different metrics. You may have to manually look at the errors counter with megacli (or whatever version you've installed) and check for non-zero error counters. We had many pre-disk-failures with "other errors" that took a couple of months to "evolve" into media errors.

Thanks for your reply, I checked with megacli64 and none of the drives have any Media Errors or Other Errors: either the raid controller is not picking the error up or it is intermittend and fixed itself somehow?

root@pve2:~/bin# ./megacli -PDList -a0

Adapter #0

Enclosure Device ID: N/A
Slot Number: 0
Drive's position: DiskGroup: 0, Span: 0, Arm: 0
Enclosure position: N/A
Device Id: 0
WWN: 50014ee210fb2ed0
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SATA

Raw Size: 1.819 TB [0xe8e088b0 Sectors]
Non Coerced Size: 1.818 TB [0xe8d088b0 Sectors]
Coerced Size: 1.818 TB [0xe8d00000 Sectors]
Sector Size:  0
Firmware state: Online, Spun Up
Device Firmware Level: 0A82
Shield Counter: 0
Successful diagnostics completion on :  N/A
SAS Address(0): 0x4433221107000000
Connected Port Number: 3(path0)
Inquiry Data:      WD20EFRX-68EUZN0                    82.00A82
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: 6.0Gb/s
Link Speed: 6.0Gb/s
Media Type: Hard Disk Device
Drive:  Not Certified
Drive Temperature : N/A
PI Eligibility:  No
Drive is formatted for PI information:  No
PI: No PI
Drive's NCQ setting : N/A
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Drive has flagged a S.M.A.R.T alert : No



Enclosure Device ID: N/A
Slot Number: 1
Drive's position: DiskGroup: 0, Span: 0, Arm: 2
Enclosure position: N/A
Device Id: 1
WWN: 5000c500b23223ee
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SATA

Raw Size: 1.819 TB [0xe8e088b0 Sectors]
Non Coerced Size: 1.818 TB [0xe8d088b0 Sectors]
Coerced Size: 1.818 TB [0xe8d00000 Sectors]
Sector Size:  0
Firmware state: Online, Spun Up
Device Firmware Level: CC26
Shield Counter: 0
Successful diagnostics completion on :  N/A
SAS Address(0): 0x4433221106000000
Connected Port Number: 1(path0)
Inquiry Data:             ST2000DM006-2DM164                      CC26
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: 6.0Gb/s
Link Speed: 6.0Gb/s
Media Type: Hard Disk Device
Drive:  Not Certified
Drive Temperature : N/A
PI Eligibility:  No
Drive is formatted for PI information:  No
PI: No PI
Drive's NCQ setting : N/A
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Drive has flagged a S.M.A.R.T alert : No



Enclosure Device ID: N/A
Slot Number: 2
Drive's position: DiskGroup: 0, Span: 0, Arm: 1
Enclosure position: N/A
Device Id: 2
WWN: 5000c500b23323ce
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SATA

Raw Size: 1.819 TB [0xe8e088b0 Sectors]
Non Coerced Size: 1.818 TB [0xe8d088b0 Sectors]
Coerced Size: 1.818 TB [0xe8d00000 Sectors]
Sector Size:  0
Firmware state: Online, Spun Up
Device Firmware Level: CC26
Shield Counter: 0
Successful diagnostics completion on :  N/A
SAS Address(0): 0x4433221105000000
Connected Port Number: 2(path0)
Inquiry Data:             ST2000DM006-2DM164                      CC26
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: 6.0Gb/s
Link Speed: 6.0Gb/s
Media Type: Hard Disk Device
Drive:  Not Certified
Drive Temperature : N/A
PI Eligibility:  No
Drive is formatted for PI information:  No
PI: No PI
Drive's NCQ setting : N/A
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Drive has flagged a S.M.A.R.T alert : No



Enclosure Device ID: N/A
Slot Number: 3
Drive's position: DiskGroup: 0, Span: 0, Arm: 3
Enclosure position: N/A
Device Id: 3
WWN: 5000c500a5b22bce
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SATA

Raw Size: 1.819 TB [0xe8e088b0 Sectors]
Non Coerced Size: 1.818 TB [0xe8d088b0 Sectors]
Coerced Size: 1.818 TB [0xe8d00000 Sectors]
Sector Size:  0
Firmware state: Online, Spun Up
Device Firmware Level: CC26
Shield Counter: 0
Successful diagnostics completion on :  N/A
SAS Address(0): 0x4433221104000000
Connected Port Number: 0(path0)
Inquiry Data:             ST2000DM006-2DM164                      CC26
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: 6.0Gb/s
Link Speed: 6.0Gb/s
Media Type: Hard Disk Device
Drive:  Not Certified
Drive Temperature : N/A
PI Eligibility:  No
Drive is formatted for PI information:  No
PI: No PI
Drive's NCQ setting : N/A
Port-0 :
Port status: Active
Port's Linkspeed: 6.0Gb/s
Drive has flagged a S.M.A.R.T alert : No




Exit Code: 0x00

 

[LnxBil]

either the raid controller is not picking the error up or it is intermittend and fixed itself somehow?

Maybe the first. Errors are per se not bad, but normal, only unrecoverable errors are bad.