Falcon Posted October 24, 2011 Share Posted October 24, 2011 I have problem with 2 drives at almost the same time. First 1 got several read errors from disk121 a 2 TB disk Disk 12: Device Identification Temp Size Free Read Write Errors disk12 WDC_WD20EARS-00MVWB0_WD-WCAZA3191168 (sdm) 1953514552 26°C 2 TB 1.82 TB 238120 3109 11000 As you see this disk have a lot off hardware errors It was not so bad because unraid fixed all the errors since it have parity check. Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 095 095 051 Pre-fail Always - 112283 3 Spin_Up_Time 0x0027 191 164 021 Pre-fail Always - 5441 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 927 5 Reallocated_Sector_Ct 0x0033 160 160 140 Pre-fail Always - 773 7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0 9 Power_On_Hours 0x0032 096 096 000 Old_age Always - 3173 10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 76 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 44 193 Load_Cycle_Count 0x0032 196 196 000 Old_age Always - 14811 194 Temperature_Celsius 0x0022 124 114 000 Old_age Always - 26 196 Reallocated_Event_Count 0x0032 001 001 000 Old_age Always - 513 197 Current_Pending_Sector 0x0032 200 198 000 Old_age Always - 315 198 Offline_Uncorrectable 0x0030 200 199 000 Old_age Offline - 48 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 123 102 000 Old_age Offline - 20695 Oct 24 20:35:07 Fileserver kernel: md: disk12 read error Oct 24 20:35:07 Fileserver kernel: handle_stripe read error: 321338184/12, count: 1 While I was making a copy to a local drive I got another Error with disk9 One 300 GB drive have been disable since unraid had problem to write to the drive: DISK_DSBL_NP /dev/md9 /mnt/disk9 300.08G 132.30G 45% 167.78G Now I have copied everything from disk9 and all I could recover from disk12 to other disks in unraid + to other external drives. My question is: What should I do now to disable both disk9 and disk12 ? I have taken disk9 out of the raid group and I am running Pre-Clear on it right now. What I think I should do is: 1. Insert disk9 into the raid group again to rebuild it. It will maybe not be correct since I have read errors from disk12.... 2. When disk9 is rebuild take the disk12 out of the raid group. 3. Recalc the parity disk. What will unraid do when it reach the read errors on disk12 when it rebuilding the disk9 ? Is it possible to remove both drives at once and just rebuild the parity disk ? Running Unraid 5 Beta 9. Thanks to unraid I have NOT lost any data yet ! Looking forward to get som answers... Quote Link to comment
dgaschk Posted October 24, 2011 Share Posted October 24, 2011 What makes you sure that you have not lost any data? With 2 drives down the data on each of those drives may be lost. There are recovery procedures that may revive one of the damages disks. Resurrecting one of them will then allow the other to be rebuilt. If there is no data on either of those disks then you can remove them and click "New Config" under Utils. Quote Link to comment
Falcon Posted October 24, 2011 Author Share Posted October 24, 2011 What makes you sure that you have not lost any data? With 2 drives down the data on each of those drives may be lost. There are recovery procedures that may revive one of the damages disks. Resurrecting one of them will then allow the other to be rebuilt. Only disk9 is totaly down, disk12 working but is full of read errors. I think I have lost 3 files, but I manage out mostly all files out from the drive with read errors. Maybe some of the errors is on filesystem level. I use Crashplan to all my important data on the unraid server. If there is no data on either of those disks then you can remove them and click "New Config" under Utils I will check that, Thank you. Quote Link to comment
Falcon Posted October 24, 2011 Author Share Posted October 24, 2011 Thank you again, now the Parity is rebuilding. Nice feature to have in an situation like this ! Quote Link to comment
dgaschk Posted October 24, 2011 Share Posted October 24, 2011 If disk 12 is giving read errors then the data on the rebuilt drive will be in error at locations corresponding to those read errors. Quote Link to comment
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