December 11, 200817 yr Every few days one of my drives gets a red dot next to it and its error count is something like 4. I understand that means it had 4 write errors? This has happened today for the third time. The first two times I unassigned the drive then reassigned it and rebuilt it from parity. Both times there were no errors during rebuilding. This time I decided to run smartctl on it and see what is going on. The command errored out and when I forced it to ignore errors with "-T verypermissive" it came back that smart monitoring wasn't even on. I tried to turn it on with "-s on" but that came back with errors too. After rebooting the computer smartctl ran fine. I noticed that the UDMA_CRC_Error_Count is 44. The wiki suggested this could indicate bad cabling. I will swap cables with a different drive and see if that helps. Does anyone have any other idea what the problem could be? Why would unraid show write errors but smartctl show Reallocated_Sector_Ct to be 0? Here is the output: === START OF INFORMATION SECTION === Model Family: Seagate Barracuda 7200.9 family Device Model: ST3300822AS Serial Number: [removed by me] Firmware Version: 3.AAE User Capacity: 300,069,052,416 bytes Device is: In smartctl database [for details use: -P show] ATA Version is: 7 ATA Standard is: Exact ATA specification draft version not indicated Local Time is: Thu Dec 11 15:29:09 2008 GMT+8 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 See vendor-specific Attribute list for marginal Attributes. 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: ( 430) seconds. Offline data collection capabilities: (0x5b) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. Offline surface scan supported. Self-test supported. No 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: ( 1) minutes. Extended self-test routine recommended polling time: ( 105) minutes. SMART Attributes Data Structure revision number: 10 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x000f 085 082 006 Pre-fail Always - 160243404 3 Spin_Up_Time 0x0003 096 096 000 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 624 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 7 Seek_Error_Rate 0x000f 089 060 030 Pre-fail Always - 926821276 9 Power_On_Hours 0x0032 078 078 000 Old_age Always - 19538 10 Spin_Retry_Count 0x0013 100 099 097 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 229 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0 189 High_Fly_Writes 0x003a 100 100 000 Old_age Always - 0 190 Airflow_Temperature_Cel 0x0022 073 044 045 Old_age Always In_the_past 27 (Lifetime Min/Max 26/27) 194 Temperature_Celsius 0x0022 027 056 000 Old_age Always - 27 (0 17 0 0) 195 Hardware_ECC_Recovered 0x001a 055 046 000 Old_age Always - 105449736 197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x003e 200 179 000 Old_age Always - 44 200 Multi_Zone_Error_Rate 0x0000 100 253 000 Old_age Offline - 0 202 TA_Increase_Count 0x0032 100 253 000 Old_age Always - 0 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% 18837 - # 2 Short offline Completed without error 00% 18836 - # 3 Short offline Completed without error 00% 18836 - # 4 Extended offline Aborted by host 90% 18836 - 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. --------------------------------------------------------------------------------------------------------
December 11, 200817 yr The error count would be of "read" errors, not write errors, although you have them too, since when a "write" fails, the drive is taken out of service (and thus the "red" indicator) It could easily be the cable. At least it is the quickest to change. Are you using an 80 conductor cable? (you should) Are you using a "round" cable? (You should not) To get any more help you will need to post a syslog from the time period where the errors occurred, before you reboot you can capture a copy of it. Instructions in the wiki under troubleshooting. Joe L.
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