September 8, 201114 yr Anyone keeping track of these things, longer term? I had a couple WD20EARS drives well into their LCC climb before realizing it. Decided it was better to let them run their course than wdidle at the late date. Now one of them with a LCC over 220K is reallocating and throwing real errors. The other drive filled faster, is less used, and slowed its climb at an LCC under 60K. Chopped up output from myMain SMART view: OK disk1 sdh 9340 WD (unknown family) WDC WD20EARS-00S8B1 80.00A80 8 [Overall health passed] load_cycle_count=59712 start/stop=1650 POH=8477 26 TEMP=26 OK disk3 sdi 4579 WD (unknown family) WDC WD20EARS-00J2GB0 80.00A80 8 [Overall health passed] load_cycle_count=220326, current_pending_sector=6, offline_uncorrectable=2, multi_zone_error_rate=6 start/stop=1831 POH=11734 46 TEMP=32 Anyway, I thought it might be interesting if there's a larger study watching the long-term outcome of these drives with huge LCCs. EDIT: Added SMART reports. SMART reports sdh: [myMain Plugin - Enjoy! ©bjp999, 2010.] smartctl -a -d ata /dev/sdh (disk1) smartctl 5.39.1 2010-01-28 r3054 [i486-slackware-linux-gnu] (local build) Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Device Model: WDC WD20EARS-00S8B1 Serial Number: WD-WCAVY41xxxxx Firmware Version: 80.00A80 User Capacity: 2,000,398,934,016 bytes Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 8 ATA Standard is: Exact ATA specification draft version not indicated Local Time is: Thu Sep 8 13:12:33 2011 PDT 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 General SMART Values: Offline data collection status: (0x82) Offline data collection activity was completed without error. Auto Offline Data Collection: Enabled. Self-test execution status: ( 0) The previous self-test routine completed without error or no self-test has ever been run. Total time to complete Offline data collection: (43200) 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: ( 255) minutes. Conveyance self-test routine recommended polling time: ( 5) minutes. SCT capabilities: (0x3031) SCT Status 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 - 0 3 Spin_Up_Time 0x0027 142 140 021 Pre-fail Always - 9875 4 Start_Stop_Count 0x0032 099 099 000 Old_age Always - 1650 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 100 253 000 Old_age Always - 0 9 Power_On_Hours 0x0032 089 089 000 Old_age Always - 8478 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 - 26 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 8 193 Load_Cycle_Count 0x0032 181 181 000 Old_age Always - 59725 194 Temperature_Celsius 0x0022 125 109 000 Old_age Always - 27 196 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 200 200 000 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 - 0 SMART Error Log Version: 1 No Errors Logged SMART Self-test log structure revision number 1 No self-tests have been logged. [To run self-tests, use: smartctl -t] 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. sdi: [myMain Plugin - Enjoy! ©bjp999, 2010.] smartctl -a -d ata /dev/sdi (disk3) smartctl 5.39.1 2010-01-28 r3054 [i486-slackware-linux-gnu] (local build) Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Device Model: WDC WD20EARS-00J2GB0 Serial Number: WD-WCAYY000xxxx Firmware Version: 80.00A80 User Capacity: 2,000,398,934,016 bytes Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 8 ATA Standard is: Exact ATA specification draft version not indicated Local Time is: Thu Sep 8 13:13:17 2011 PDT 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 General SMART Values: Offline data collection status: (0x84) Offline data collection activity was suspended by an interrupting command from host. Auto Offline Data Collection: Enabled. Self-test execution status: ( 0) The previous self-test routine completed without error or no self-test has ever been run. Total time to complete Offline data collection: (38760) 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: ( 255) minutes. Conveyance self-test routine recommended polling time: ( 5) minutes. SCT capabilities: (0x3031) SCT Status 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 - 0 3 Spin_Up_Time 0x0027 163 156 021 Pre-fail Always - 8833 4 Start_Stop_Count 0x0032 099 099 000 Old_age Always - 1831 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 100 253 000 Old_age Always - 0 9 Power_On_Hours 0x0032 084 084 000 Old_age Always - 11736 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 - 46 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 14 193 Load_Cycle_Count 0x0032 127 127 000 Old_age Always - 220464 194 Temperature_Celsius 0x0022 119 112 000 Old_age Always - 33 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 6 198 Offline_Uncorrectable 0x0030 200 200 000 Old_age Offline - 2 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 200 200 000 Old_age Offline - 6 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 without error 00% 8582 - 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.
September 8, 201114 yr .... I keep forgetting to look at my LCC counts. I have quite a few EARS in one of my unRAID boxes. All of those drives came from a WHSv1 before that. 2 have already died after they went into my unraid box. I would not be surprised if I have massive LCC's. Most of my 1.5tb and 2TB drives that were purchased before 2011 are delegated to backup server use now. That would include all of my WD EARS. EDIT: disk1 WDC WD20EARS-00J2GB0 80.00A80 8 » load_cycle_count=47728 » udma_crc_error_count=310427 disk2 WDC WD20EARS-00J2GB0 80.00A80 8 » load_cycle_count=9375 disk3 WDC WD20EARS-00J2GB0 80.00A80 8 » load_cycle_count=40139 » ata_error_count=4 disk4 WDC WD20EARS-00J2GB0 80.00A80 8 » load_cycle_count=55019 » udma_crc_error_count=121278 » ata_error_count=3 Ok. It looks like I am down to 4 from my original 8 EARS in my unraid box. 2 died and 2 were repurposed (one corrupted since then). Disk 2 is about 6-8 months old? It looks like I have some High udma_crc_error_count also on disk 1 and 4... I am not sure if there is a connection to the LCC's. that error is usually a cabling issue. Unfortunately, those drives are all on the same backplane/SAS cable so I think those are old leftover numbers from WHS box. I'll have to keep an eye out on those numbers and see if it is a continuing issue.
September 8, 201114 yr Why are you not using wdidle? I ran that on all my WD EARS drives as soon as I heard about the LCC issue. Here are my drives: disk1 WDC WD20EARS-00MVWB0 Start Stop Count: 1450 Power on Hrs: 4730 (197 days) LCC: 2427 disk3 WDC WD20EARS-00MVWB0 Start Stop Count: 801 Power on Hrs: 4910 (204 days) LCC: 2737
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