Two Disks Status Dead

Question

I have two identical Pro Pioneer's that I keep in sync. This week I got the following error:

"Detected increasing uncorrectable errors[14] on disk 5 [ST31500341AS, 9VS2H4KV] in the past 30 days. This often indicates an impending failure. Please be prepared to replace this disk to maintain data redundancy."

I swapped out the disk with a spare and, and at that time disk 6 was also marked dead. I then placed the "bad" disk back onto the original slot.

Front panel: Vol C unprotected

I was able to sync the drives and other than the messages all appears to be OK. No data appears to be lost. Interesting with two drives marked as "dead"

RAID Configuration

Configuration:	RAID Level X-RAID2, 6 disks
Status:	Not redundant. A disk failure will render this volume dead.

I'd be happy to replace the two drives from the approved list but they don't appear to be bad. I pulled disk 5 and tested on a Linux box and no errors.

Any help would be appreciated!

brb1800 · Answer

disk_smart.log for "dead" drives 5&amp;6&nbsp;&nbsp;***** smartctl output for sde *****smartctl 5.42 2011-10-20 r3458 [x86_64-linux-2.6.37.6.RNx86_64.2.4] (local build)Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net=== START OF INFORMATION SECTION ===Model Family: Seagate Barracuda 7200.11Device Model: ST31500341ASSerial Number: 9VS2H4KVLU WWN Device Id: 5 000c50 01570d67bFirmware Version: CC1HUser Capacity: 1,500,301,910,016 bytes [1.50 TB]Sector Size: 512 bytes logical/physicalDevice is: In smartctl database [for details use: -P show]ATA Version is: 8ATA Standard is: ATA-8-ACS revision 4Local Time is: Thu Jun 1 18:04:49 2017 EDTSMART support is: Available - device has SMART capability.SMART support is: Enabled=== START OF READ SMART DATA SECTION ===SMART overall-health self-assessment test result: PASSEDGeneral SMART Values:Offline data collection status: (0x82) Offline data collection activitywas completed without error.Auto Offline Data Collection: Enabled.Self-test execution status: ( 0) The previous self-test routine completedwithout error or no self-test has everbeen run.Total time to complete Offlinedata collection: ( 609) seconds.Offline data collectioncapabilities: (0x7b) SMART execute Offline immediate.Auto Offline data collection on/off support.Suspend Offline collection upon newcommand.Offline surface scan supported.Self-test supported.Conveyance Self-test supported.Selective Self-test supported.SMART capabilities: (0x0003) Saves SMART data before enteringpower-saving mode.Supports SMART auto save timer.Error logging capability: (0x01) Error logging supported.General Purpose Logging supported.Short self-test routinerecommended polling time: ( 1) minutes.Extended self-test routinerecommended polling time: ( 255) minutes.Conveyance self-test routinerecommended polling time: ( 2) minutes.SCT capabilities: (0x103f) SCT Status supported.SCT Error Recovery Control supported.SCT Feature Control supported.SCT Data Table supported.SMART Attributes Data Structure revision number: 10Vendor Specific SMART Attributes with Thresholds:ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE1 Raw_Read_Error_Rate 0x000f 120 099 006 Pre-fail Always - 2423775813 Spin_Up_Time 0x0003 100 092 000 Pre-fail Always - 04 Start_Stop_Count 0x0032 095 095 020 Old_age Always - 53265 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 07 Seek_Error_Rate 0x000f 081 060 030 Pre-fail Always - 1268056239 Power_On_Hours 0x0032 081 081 000 Old_age Always - 1693410 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 412 Power_Cycle_Count 0x0032 099 099 020 Old_age Always - 2042184 End-to-End_Error 0x0032 100 100 099 Old_age Always - 0187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0188 Command_Timeout 0x0032 100 099 000 Old_age Always - 2 (2, 2)189 High_Fly_Writes 0x003a 001 001 000 Old_age Always - 241190 Airflow_Temperature_Cel 0x0022 059 048 045 Old_age Always - 41 (Min/Max 27/41)194 Temperature_Celsius 0x0022 041 052 000 Old_age Always - 41 (0 21 0 0 0)195 Hardware_ECC_Recovered 0x001a 024 022 000 Old_age Always - 242377581197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline - 179177445669135241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 2199036251242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 1369673908SMART Error Log Version: 1No Errors LoggedSMART Self-test log structure revision number 1Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error# 1 Short offline Completed without error 00% 16934 -# 2 Short offline Completed without error 00% 0 -SMART Selective self-test log data structure revision number 1SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS1 0 0 Not_testing2 0 0 Not_testing3 0 0 Not_testing4 0 0 Not_testing5 0 0 Not_testingSelective self-test flags (0x0):After scanning selected spans, do NOT read-scan remainder of disk.If Selective self-test is pending on power-up, resume after 0 minute delay.&nbsp;&nbsp;***** smartctl output for sdf *****smartctl 5.42 2011-10-20 r3458 [x86_64-linux-2.6.37.6.RNx86_64.2.4] (local build)Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net=== START OF INFORMATION SECTION ===Device Model: ST1500DM003-9YN16GSerial Number: W1E095F2LU WWN Device Id: 5 000c50 04a84a084Firmware Version: CC4CUser Capacity: 1,500,301,910,016 bytes [1.50 TB]Sector Sizes: 512 bytes logical, 4096 bytes physicalDevice is: Not in smartctl database [for details use: -P showall]ATA Version is: 8ATA Standard is: ATA-8-ACS revision 4Local Time is: Thu Jun 1 18:04:51 2017 EDTSMART support is: Available - device has SMART capability.SMART support is: Enabled=== START OF READ SMART DATA SECTION ===SMART overall-health self-assessment test result: PASSEDGeneral SMART Values:Offline data collection status: (0x82) Offline data collection activitywas completed without error.Auto Offline Data Collection: Enabled.Self-test execution status: ( 0) The previous self-test routine completedwithout error or no self-test has everbeen run.Total time to complete Offlinedata collection: ( 609) seconds.Offline data collectioncapabilities: (0x7b) SMART execute Offline immediate.Auto Offline data collection on/off support.Suspend Offline collection upon newcommand.Offline surface scan supported.Self-test supported.Conveyance Self-test supported.Selective Self-test supported.SMART capabilities: (0x0003) Saves SMART data before enteringpower-saving mode.Supports SMART auto save timer.Error logging capability: (0x01) Error logging supported.General Purpose Logging supported.Short self-test routinerecommended polling time: ( 1) minutes.Extended self-test routinerecommended polling time: ( 199) minutes.Conveyance self-test routinerecommended polling time: ( 2) minutes.SCT capabilities: (0x3085) SCT Status supported.SMART Attributes Data Structure revision number: 10Vendor Specific SMART Attributes with Thresholds:ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE1 Raw_Read_Error_Rate 0x000f 118 099 006 Pre-fail Always - 2007305123 Spin_Up_Time 0x0003 095 094 000 Pre-fail Always - 04 Start_Stop_Count 0x0032 097 097 020 Old_age Always - 31395 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 07 Seek_Error_Rate 0x000f 072 060 030 Pre-fail Always - 129401782249 Power_On_Hours 0x0032 087 087 000 Old_age Always - 1169310 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 012 Power_Cycle_Count 0x0032 099 099 020 Old_age Always - 1295183 Runtime_Bad_Block 0x0032 099 099 000 Old_age Always - 1184 End-to-End_Error 0x0032 100 100 099 Old_age Always - 0187 Reported_Uncorrect 0x0032 095 095 000 Old_age Always - 5188 Command_Timeout 0x0032 100 097 000 Old_age Always - 3 (1, 3)189 High_Fly_Writes 0x003a 100 100 000 Old_age Always - 0190 Airflow_Temperature_Cel 0x0022 063 056 045 Old_age Always - 37 (Min/Max 34/37)191 G-Sense_Error_Rate 0x0032 100 100 000 Old_age Always - 0192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 15193 Load_Cycle_Count 0x0032 099 099 000 Old_age Always - 3244194 Temperature_Celsius 0x0022 037 044 000 Old_age Always - 37 (0 22 0 0 0)197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline - 8847632636742241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 25626624852809242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 100913557399751SMART Error Log Version: 1No Errors LoggedSMART Self-test log structure revision number 1Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error# 1 Short offline Completed without error 00% 11684 -# 2 Short offline Completed without error 00% 11679 -# 3 Short offline Completed without error 00% 0 -SMART Selective self-test log data structure revision number 1SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS1 0 0 Not_testing2 0 0 Not_testing3 0 0 Not_testing4 0 0 Not_testing5 0 0 Not_testingSelective self-test flags (0x0):After scanning selected spans, do NOT read-scan remainder of disk.If Selective self-test is pending on power-up, resume after 0 minute delay.

Retired_Member · Answer

After downloading the logs you might want to check smart_history.log in column uncorrectable_err and probably see some information.

You can download the logs from the webadmin page. Go to /system/logs and press the button "Download logs". The result will be a zip-container on your workstation, where you can see about 60+ different logs. smart_history.log is one of them.

StephenB · Answer

The smart info on the two drives you posted shows 0 non--correctable counts for both disks. &nbsp;Maybe check SMART stats on all the drives?
&nbsp;
On the HCL - Netgear stopped updating it for legacy NAS quite a while ago. &nbsp;There's no point in trying to track down discontinued disks and buying them as replacements. &nbsp;The best strategy is to ignore it for legacy NAS. &nbsp;If you normally get consumer-grade drives, then get a WDC Red or a Seagate Ironwolf. &nbsp;If you normally get enterprise, then consider the Red Pro and the Ironwolf Pro (though any enterprise grade disk from WDC or Seagate should work with RAID).

brb1800 · Answer

StephenB wrote:The smart info on the two drives you posted shows 0 non--correctable counts for both disks. &nbsp;Maybe check SMART stats on all the drives?&nbsp;On the HCL - Netgear stopped updating it for legacy NAS quite a while ago. &nbsp;There's no point in trying to track down discontinued disks and buying them as replacements. &nbsp;The best strategy is to ignore it for legacy NAS. &nbsp;If you normally get consumer-grade drives, then get a WDC Red or a Seagate Ironwolf. &nbsp;If you normally get enterprise, then consider the Red Pro and the Ironwolf Pro (though any enterprise grade disk from WDC or Seagate should work with RAID).Stephen thanks for the useful information!&nbsp;&nbsp;In summary:-The NAS has 6 drives and two of them have status of "dead" - but I can still access all data. If they were both truly dead there should be data loss. It can only function with a maximum of one dead drive.-I tested on a workstation - live Ubuntu Live CD for Smart info on disk 5 and it passed SMART -&nbsp;&nbsp;The SMART for the other 4 drives checked out as OK. I'm on the current&nbsp;version of Raidiator, so my guess is the hardware (motherboard/controller) is starting to go. If that's true, I still got many years of use from the NAS so no complaints.

Sandshark · Answer

I have seen this type of behavior before when I was still on OS4.2.x.&nbsp; It started happening when I added two new drives to a system that previously had 4.&nbsp; The new drives were a different brand.&nbsp; After it happened more than once, I&nbsp;noticed that the problem was occurring when the drives came out of sleep mode and&nbsp;speculated the&nbsp;cause to be that the two new ones came out of sleep mode at a different pace than the old ones.&nbsp;&nbsp;Turning off drive spin-down was the solution to stop it from happeneing, whihc seemed to confirm my speculative cause.&nbsp; I posted the problem on the firum, and it was never addressed that I know of.&nbsp;Before I fixed the issue, to get rid of the "dead" drives, I made sure my backup was in order, pulled one "dead" drive, connected it to a PC, tested it (all OK),&nbsp;deleted the partitions,&nbsp;then re-inserted it.&nbsp; Once that re-sync'ed, I did the same with the other.&nbsp; Of course, the first time I did this I didn't realize why it had happened and it happened again.&nbsp; Once I figured out the trigger, I did a factory default for good measure, so I can't say for sure the individual drive fixes would have stayed fixed, but I think they would have.&nbsp;Ultimately, I upgraded the system to OS6.x and have had no problems, even with drive spin-down enabled.

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