February 12, 201214 yr How do I determine what the errors are on a drive? I sometimes get over 100 errors on a drive that has no data on it yet. What could cause that? How do I review the errors themselves?
February 12, 201214 yr How do I determine what the errors are on a drive?The errors show on the unRAID main tab are read-errors. (99% of the time, they are un-readable sectors on the disk) I sometimes get over 100 errors on a drive that has no data on it yet. What could cause that?When parity is calculated, ALL sectors are read. An un-readable sector is a "read" error. A " write" error would immediately take the disk off-line and it would show as a "red" indicator on the unRAID display. It would be emulated by reading/writing parity and the remaining data drives. How do I review the errors themselves? You would review the system log.
February 12, 201214 yr Author Thanks Joe. How do I interpret the log? How do I run a SMART report? Is there an app I can install that would help me to understand what I am seeing in the log?
February 13, 201214 yr http://lime-technology.com/wiki/index.php?title=Troubleshooting#Obtaining_a_SMART_report
February 13, 201214 yr Author So I ran the following command smartctl -d ata -tlong /dev/sdb >/boot/smart.txt no error was reported in the command structure but I don't see anything occuring on that drive. Am I missing something?
February 13, 201214 yr Author There isn't anything. There isn't a folder called boot on the flash drive.
February 13, 201214 yr Author smartctl 5.40 2010-10-16 r3189 [i486-slackware-linux-gnu] (local build) Copyright © 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Device Model: WDC WD20EARX-00PASB0 Serial Number: WD-WMAZA5406838 Firmware Version: 51.0AB51 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: Mon Feb 13 18:25:31 2012 EST 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: ( 249) Self-test routine in progress... 90% of test remaining. Total time to complete Offline data collection: (35760) 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: (0x3035) 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 199 198 051 Pre-fail Always - 4791 3 Spin_Up_Time 0x0027 196 170 021 Pre-fail Always - 5175 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 364 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 099 099 000 Old_age Always - 1227 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 - 164 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 68 193 Load_Cycle_Count 0x0032 199 199 000 Old_age Always - 4147 194 Temperature_Celsius 0x0022 117 094 000 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 - 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 - 70 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.
February 14, 201214 yr Author Ya but I have reinitialized it all and fixed everything. maybe now it doesn't show as a problem. Hmmmm. I will keep this monitored. Can you explain to me how you read that log so that I may learn?
February 14, 201214 yr Ya but I have reinitialized it all and fixed everything. maybe now it doesn't show as a problem. Hmmmm. I will keep this monitored. Can you explain to me how you read that log so that I may learn? you did not wait for the "long" test to complete before getting that status report. Self-test execution status: ( 249) Self-test routine in progress... 90% of test remaining. The long test takes many hours for a large drive. (It has to read every sector on the entire disk) Typical read speed is between 75 and 100MB/s. You'll have to disable the spin-down timer on that drive, otherwise, it will probably abort the long test when spun down. Actually, the smart report showed the disk's estimate of how long the "long" test will take: Total time to complete Offline data collection: (35760) seconds. It seems to think that is just under 10 hours before the long test will complete. Joe L.
February 14, 201214 yr These values may indicate a problem if the raw value is not zero. 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0
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