Greetings Running a Raid-10 array made up of 4 - 1 TB drives on a debian testing (11) system. mdadm - v4.1 - 2018-10-01 is the version being used. Some weirdness is happening - - - vis a vis - - - I have one directory (not small) that has disappeared. I last accessed said directory (still have the pdf open which is how I could get this information) 'Last accessed 2020-01-19 6:32 A.M.' as indicated in the 'Properties' section of the file in question. Has been suggested to me that I make the array read only until this is resolved. I have space on the the array on a different system to recover this array. Suggestions on how to do both of the above would be aprreciated Checked the drives that make up the array using smartctl and the results are (I removed text from each result that did not seem to have any bearing on the test results (I likely used the wrong 'code')): # smartctl -a /dev/sdb smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-2-amd64] (local build) Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Western Digital Red Device Model: WDC WD10EFRX-68FYTN0 Serial Number: WD-WCC4J3TC25D3 LU WWN Device Id: 5 0014ee 20cd9cd93 Firmware Version: 82.00A82 User Capacity: 1,000,204,886,016 bytes [1.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 5400 rpm Device is: In smartctl database [for details use: -P show] ATA Version is: ACS-2 (minor revision not indicated) SATA Version is: SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s) Local Time is: Fri Feb 7 08:35:51 2020 CST SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED SMART Attributes Data Structure revision number: 16 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 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0027 132 130 021 Pre-fail Always - 4391 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 165 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0 9 Power_On_Hours 0x0032 058 058 000 Old_age Always - 31314 10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 100 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 148 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 81 193 Load_Cycle_Count 0x0032 187 187 000 Old_age Always - 39644 194 Temperature_Celsius 0x0022 115 101 000 Old_age Always - 28 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0 SMART Error Log Version: 1 No Errors Logged # smartctl -a /dev/sdc smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-2-amd64] (local build) Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Western Digital Red Device Model: WDC WD10EFRX-68FYTN0 Serial Number: WD-WCC4J6TTLZTE LU WWN Device Id: 5 0014ee 2b784490e Firmware Version: 82.00A82 User Capacity: 1,000,204,886,016 bytes [1.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 5400 rpm Device is: In smartctl database [for details use: -P show] ATA Version is: ACS-2 (minor revision not indicated) SATA Version is: SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s) Local Time is: Fri Feb 7 08:36:49 2020 CST SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED SMART Attributes Data Structure revision number: 16 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 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0027 132 130 021 Pre-fail Always - 4375 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 151 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0 9 Power_On_Hours 0x0032 056 056 000 Old_age Always - 32529 10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 100 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 149 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 80 193 Load_Cycle_Count 0x0032 187 187 000 Old_age Always - 39651 194 Temperature_Celsius 0x0022 115 099 000 Old_age Always - 28 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0 SMART Error Log Version: 1 No Errors Logged # smartctl -a /dev/sde smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-2-amd64] (local build) Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Western Digital Red Device Model: WDC WD10EFRX-68FYTN0 Serial Number: WD-WCC4J6XRY5AN LU WWN Device Id: 5 0014ee 20cd940c6 Firmware Version: 82.00A82 User Capacity: 1,000,204,886,016 bytes [1.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 5400 rpm Device is: In smartctl database [for details use: -P show] ATA Version is: ACS-2 (minor revision not indicated) SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Fri Feb 7 08:37:21 2020 CST SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED SMART Attributes Data Structure revision number: 16 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 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0027 131 129 021 Pre-fail Always - 4441 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 152 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0 9 Power_On_Hours 0x0032 056 056 000 Old_age Always - 32530 10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 100 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 150 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 83 193 Load_Cycle_Count 0x0032 187 187 000 Old_age Always - 39603 194 Temperature_Celsius 0x0022 113 094 000 Old_age Always - 30 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 1 200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0 SMART Error Log Version: 1 No Errors Logged # smartctl -a /dev/sdf smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-2-amd64] (local build) Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Western Digital Red Device Model: WDC WD10EFRX-68FYTN0 Serial Number: WD-WCC4J4XV62F4 LU WWN Device Id: 5 0014ee 20cd9d7d1 Firmware Version: 82.00A82 User Capacity: 1,000,204,886,016 bytes [1.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 5400 rpm Device is: In smartctl database [for details use: -P show] ATA Version is: ACS-2 (minor revision not indicated) SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Fri Feb 7 08:37:44 2020 CST SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED SMART Attributes Data Structure revision number: 16 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 200 200 051 Pre-fail Always - 8 3 Spin_Up_Time 0x0027 135 134 021 Pre-fail Always - 4241 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 165 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0 9 Power_On_Hours 0x0032 059 059 000 Old_age Always - 30121 10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 100 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 148 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 82 193 Load_Cycle_Count 0x0032 187 187 000 Old_age Always - 39528 194 Temperature_Celsius 0x0022 115 097 000 Old_age Always - 28 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0
