Festplatten-SMART-Fehler, aber Sektor scheint lesbar zu sein

TL; DR: Wo ist mein schlechter Sektor?

Hallo,

Ich habe eine Platte, die den SMART-Test nicht besteht. Bei LBA 1565541432 gibt es angeblich einen schlechten Sektor, aber wenn ich versuche, diesen Sektor mit dd zu lesen, scheint der Sektor gut zu lesen. Zu Ihrer Information: Ich habe das Badblocks-HOWTO gelesen und schlechte Sektoren auf Festplatten auf diese Weise "repariert", obwohl ich zugeben muss, dass es Jahre her war.

root@machine:~# dd if=/dev/sde bs=512 skip=1565541432 of=/dev/null count=1 1+0 records in 1+0 records out 512 bytes copied, 0.000114903 s, 4.5 MB/s 

Es scheint also, dass dieser Sektor doch lesbar ist. Current_Pending_Sector ist auch 0 im SMART-Status. Bin ich auf der Suche nach dieser vermeintlich schlechten Branche am falschen Ort?

root@machine:~# smartctl -a /dev/sde smartctl 6.2 2013-07-26 r3841 [x86_64-linux-4.7.0-0.bpo.1-amd64] (local build) Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org  === START OF INFORMATION SECTION === Model Family: Western Digital Red (AF) Device Model: WDC WD30EFRX-68EUZN0 Serial Number: WD-WMC4Nxxxxxxx LU WWN Device Id: 5 0014ee xxxxxxxxx Firmware Version: 80.00A80 User Capacity: 3,000,592,982,016 bytes [3.00 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 May 25 10:40:10 2018 CEST SMART support is: Available - device has SMART capability. SMART support is: Enabled  === START OF READ SMART DATA SECTION === SMART STATUS RETURN: incomplete response, ATA output registers missing SMART overall-health self-assessment test result: PASSED Warning: This result is based on an Attribute check.  General SMART Values: Offline data collection status: (0x00) Offline data collection activity was never started. Auto Offline Data Collection: Disabled. Self-test execution status: ( 113) The previous self-test completed having the read element of the test failed. Total time to complete Offline data collection: (41520) seconds. Offline data collection capabilities: (0x7b) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. Offline surface scan supported. Self-test supported. Conveyance Self-test supported. Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x01) Error logging supported. General Purpose Logging supported. Short self-test routine recommended polling time: ( 2) minutes. Extended self-test routine recommended polling time: ( 417) minutes. Conveyance self-test routine recommended polling time: ( 5) minutes. SCT capabilities: (0x703d) SCT Status supported. SCT Error Recovery Control supported. SCT Feature Control supported. SCT Data Table supported.  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 - 25 3 Spin_Up_Time 0x0027 178 178 021 Pre-fail Always - 6058 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 26 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 046 046 000 Old_age Always - 39868 10 Spin_Retry_Count 0x0032 100 253 000 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 - 26 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 25 193 Load_Cycle_Count 0x0032 001 001 000 Old_age Always - 623314 194 Temperature_Celsius 0x0022 107 100 000 Old_age Always - 43 196 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 200 200 000 Old_age Offline - 1  SMART Error Log Version: 1 No Errors Logged  SMART Self-test log structure revision number 1 Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error # 1 Short offline Completed: read failure 10% 39868 1565541432 # 2 Extended offline Completed: read failure 10% 39865 1565541432 # 3 Short offline Completed: read failure 10% 39849 1565541432 # 4 Short offline Completed: read failure 10% 39845 1565541432 # 5 Short offline Completed: read failure 10% 39835 1565541432  SMART Selective self-test log data structure revision number 1 SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Not_testing 2 0 0 Not_testing 3 0 0 Not_testing 4 0 0 Not_testing 5 0 0 Not_testing Selective 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.