January 9, 20206 yr Hi unraid crew, Two/three days ago my 8tb Seagate - sdc had 237 read errors, unraid disabled the drive (red X) and emulated the contents. The yesterday I attempted to do some investigation, and was unable to get the drive to spin up, or download smart data for it. Once the array was stopped, sdc was no longer an option in the list of devices. I downloaded the diagnostics, but the smart data was predictably missing for the drive. The attached smart details are from after the reboot. Powered down the box today, re-seated the drive cables (just in case, but don't think that was the issue), and then booted up, drive was visible again in the device list, so I started up the array and a data rebuild is in process. Hardware Dell T110, Parity=sdf WDC_WD80EMAZ 8tb, disk1=sdc ST8000DM004 8tb, disk2=sdd TOSHIBA_DT01ACA300 3tb, disk3=sde WDC_WD20EARS 2tb, with a cache=sdb Crucial_CT120. 16gb ram. unRaid 6.7.2 Looking at some other threads on the forum, I'm a little concerned about the SMART numbers for the drive, the read/seek/timeout/ecc numbers seem really high - should I be replacing it asap? (or assuming it rebuilds without error should I be ok for a while) === START OF INFORMATION SECTION === Model Family: Seagate Barracuda Compute Device Model: ST8000DM004-2CX188 === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE 1 Raw_Read_Error_Rate POSR-- 080 064 006 - 94092324 3 Spin_Up_Time PO---- 092 091 000 - 0 4 Start_Stop_Count -O--CK 099 099 020 - 1539 5 Reallocated_Sector_Ct PO--CK 100 100 010 - 0 7 Seek_Error_Rate POSR-- 083 060 045 - 221147486 9 Power_On_Hours -O--CK 076 076 000 - 21404 (210 195 0) 10 Spin_Retry_Count PO--C- 100 100 097 - 0 12 Power_Cycle_Count -O--CK 100 100 020 - 55 183 Runtime_Bad_Block -O--CK 100 100 000 - 0 184 End-to-End_Error -O--CK 100 100 099 - 0 187 Reported_Uncorrect -O--CK 100 100 000 - 0 188 Command_Timeout -O--CK 094 057 000 - 214751641653 189 High_Fly_Writes -O-RCK 100 100 000 - 0 190 Airflow_Temperature_Cel -O---K 073 042 040 - 27 (Min/Max 25/27) 191 G-Sense_Error_Rate -O--CK 100 100 000 - 0 192 Power-Off_Retract_Count -O--CK 100 100 000 - 576 193 Load_Cycle_Count -O--CK 099 099 000 - 3228 194 Temperature_Celsius -O---K 027 058 000 - 27 (0 16 0 0 0) 195 Hardware_ECC_Recovered -O-RC- 080 064 000 - 94092324 197 Current_Pending_Sector -O--C- 100 100 000 - 0 198 Offline_Uncorrectable ----C- 100 100 000 - 0 199 UDMA_CRC_Error_Count -OSRCK 200 200 000 - 0 240 Head_Flying_Hours ------ 100 253 000 - 15806 (156 110 0) 241 Total_LBAs_Written ------ 100 253 000 - 61074957028 242 Total_LBAs_Read ------ 100 253 000 - 402051143430 ||||||_ K auto-keep |||||__ C event count ||||___ R error rate |||____ S speed/performance ||_____ O updated online |______ P prefailure warning tower-diagnostics-20200108-0319(anon).zip tower-smart-20200108-2119.zip Edited January 15, 20206 yr by seestray Marking topic solved
January 9, 20206 yr Community Expert Disk look fine, looks more like a connection issue, more info on some Seagate attributes here.
January 13, 20206 yr Author Interesting, thanks for the info on the Seagate attributes, if anything reporting raw numbers completely differently them all other manufacturers make me want to avoid the brand going forward.
January 13, 20206 yr Sorry to jump on this thread but it's similar to something I have been wanting to know. I have a disk that is now missing and contents stimulated. When I boot to Ubuntu from a usb the disk is mountable and smart tests show the disk as ok. Does anyone know what the trigger is for the missing disk errors?
January 13, 20206 yr Community Expert Just now, latitudehopper said: Sorry to jump on this thread but it's similar to something I have been wanting to know. I have a disk that is now missing and contents stimulated. When I boot to Ubuntu from a usb the disk is mountable and smart tests show the disk as ok. Does anyone know what the trigger is for the missing disk errors? You say the disk is ‘missing’? This would imply it cannot even be seen at thenBiOS level probably because it has dropped offline. If instead you merely mean disabled then this will happen if a write to the disk fails for any reason.
January 13, 20206 yr Perhaps that is what it said, I was going from memory but will check. Ok, so any write failure disables it. I'm not an expert but does that mean the disk is on its way out or just a parity protection thing?
January 13, 20206 yr Community Expert 1 minute ago, latitudehopper said: Perhaps that is what it said, I was going from memory but will check. Ok, so any write failure disables it. I'm not an expert but does that mean the disk is on its way out or just a parity protection thing? A write failure can be from a wide variety of reasons - only some of which indicate a problem with the disk. Probably the commonest cause is cable/connection issues.
January 13, 20206 yr Ok. Thanks for your help. Perhaps a power supply issue, I am running a splitter.
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