rsivak@xxxxxxxxxx writes: > I would say that these are probably desktop type drives - not > enterprise drives. Right. > In which case, what you're probably hitting are > media errors - when a drive hits a bad sector. A consumer level drive > will try as hard as possible to retrieve the data - I'd say somewhere > around 15 seconds, depending on the manufacturer. This is often > enough to get the drive kicked out of the array. Could be. I've included the SMART info for one of the drives below. Most of the values look very good to me. E.g. no re-allocated sectors at all. The only one that raises an eyebrow is: 195 Hardware_ECC_Recovered 0x001a 100 100 000 Old_age Always - 540903625 Do the stats below support the theory that these are timeouts due to media errors? Does anyone know if Samsung Spinpoint drives can be tweaked to not try so hard to retrieve data? Or is it possible to make the kernel more tolerant of such timeouts? Thanks, Dan smartctl version 5.38 [i686-pc-linux-gnu] Copyright (C) 2002-8 Bruce Allen Home page is http://smartmontools.sourceforge.net/ === START OF INFORMATION SECTION === Model Family: SAMSUNG SpinPoint P120 series Device Model: SAMSUNG SP2504C Serial Number: S09QJ1UL210508 Firmware Version: VT100-33 User Capacity: 250,059,350,016 bytes Device is: In smartctl database [for details use: -P show] ATA Version is: 7 ATA Standard is: ATA/ATAPI-7 T13 1532D revision 4a Local Time is: Wed Jun 2 11:23:40 2010 EDT ==> WARNING: May need -F samsung3 enabled; see manual for details. 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: (4965) 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: ( 82) minutes. 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 0x000f 100 100 051 Pre-fail Always - 789 3 Spin_Up_Time 0x0007 100 100 025 Pre-fail Always - 5952 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 101 5 Reallocated_Sector_Ct 0x0033 253 253 010 Pre-fail Always - 0 7 Seek_Error_Rate 0x000f 253 253 051 Pre-fail Always - 0 8 Seek_Time_Performance 0x0025 253 253 015 Pre-fail Offline - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 34577 10 Spin_Retry_Count 0x0033 253 253 051 Pre-fail Always - 0 11 Calibration_Retry_Count 0x0012 253 002 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 86 190 Airflow_Temperature_Cel 0x0022 142 106 000 Old_age Always - 32 194 Temperature_Celsius 0x0022 142 106 000 Old_age Always - 32 195 Hardware_ECC_Recovered 0x001a 100 100 000 Old_age Always - 540903625 196 Reallocated_Event_Count 0x0032 253 253 000 Old_age Always - 0 197 Current_Pending_Sector 0x0012 253 100 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 253 253 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x000a 100 100 000 Old_age Always - 0 201 Soft_Read_Error_Rate 0x000a 100 100 000 Old_age Always - 0 202 TA_Increase_Count 0x0032 253 253 000 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 Extended offline Completed without error 00% 34427 - # 2 Extended offline Completed without error 00% 34258 - # 3 Extended offline Completed without error 00% 34089 - # 4 Extended offline Completed without error 00% 34002 - # 5 Short offline Completed without error 00% 34001 - # 6 Extended offline Completed without error 00% 33921 - # 7 Extended offline Completed without error 00% 33754 - # 8 Extended offline Completed without error 00% 33586 - # 9 Extended offline Completed without error 00% 33417 - #10 Extended offline Completed without error 00% 33249 - #11 Extended offline Completed without error 00% 33077 - #12 Extended offline Completed without error 00% 32909 - #13 Extended offline Completed without error 00% 32740 - #14 Extended offline Completed without error 00% 32513 - #15 Extended offline Completed without error 00% 32344 - #16 Extended offline Completed without error 00% 32176 - #17 Extended offline Completed without error 00% 32066 - #18 Short offline Completed without error 00% 32064 - #19 Extended offline Completed without error 00% 32007 - #20 Extended offline Completed without error 00% 31839 - #21 Extended offline Completed without error 00% 31670 - SMART Selective Self-Test Log Data Structure Revision Number (0) should be 1 SMART Selective self-test log data structure revision number 0 Warning: ATA Specification requires 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. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
