Hi, I am replying to the message here: http://www.spinics.net/lists/linux-scsi/msg47723.html (I just registered to the mailing list, so I manually added the Reply-To header, hopefully it's correct) It seems I have very similar symptoms with 2.6.36, I can reproduce them easily in a live system, I could even grant shell access if necessary. It didn't happen at all with stock ubuntu 8.04 LTS kernel (2.6.32-25-generic-pae). Currently, 1 out of 3 SATA hard drives are suffering from this. I left a dd command overnight to read the drive contents to /dev/null. One drive didn't finish while all the other drives finished with normal speeds. I have attached dmesg and smartctl messages. Should I try and revert the mentioned patches, or something else? Anyone able to provide direct links to these patches, I don't normally involve in kernel development so I'm kind of new to this. Here are my logs. SMART doesn't report any errors, but I see a lot of errors in dmesg. $ sudo smartctl -a /dev/sdc 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 === Device Model: WDC WD20EADS-00S2B0 Serial Number: WD-WCAVY0359972 Firmware Version: 04.05G04 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 Nov 29 12:18:20 2010 EET 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: (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: (0x303f) 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 157 133 021 Pre-fail Always - 9108 4 Start_Stop_Count 0x0032 099 099 000 Old_age Always - 1198 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 085 085 000 Old_age Always - 11337 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 - 58 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 22 193 Load_Cycle_Count 0x0032 172 172 000 Old_age Always - 86640 194 Temperature_Celsius 0x0022 109 095 000 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 200 200 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 1279 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 Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error # 1 Short offline Completed without error 00% 5200 - 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. $ dmesg|tail -30 [51214.053097] ata4.00: failed command: READ DMA EXT [51214.055504] ata4.00: cmd 25/00:00:bf:0d:38/00:02:94:00:00/e0 tag 0 dma 262144 in [51214.055507] res 40/00:00:00:00:00/84:01:09:00:00/00 Emask 0x24 (host bus error) [51214.060435] ata4.00: status: { DRDY } [51214.062824] ata4: soft resetting link [51214.339049] ata4.00: configured for UDMA/33 [51214.339059] ata4.00: device reported invalid CHS sector 0 [51214.339117] ata4: EH complete [51253.024028] ata4: lost interrupt (Status 0x51) [51253.024050] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen [51253.026504] ata4.00: BMDMA stat 0x26, BMDMA stat 0x0, BMDMA stat 0x0, BMDMA stat 0x0, BMDMA stat 0x0 [51253.029131] ata4.00: failed command: READ DMA EXT [51253.031523] ata4.00: cmd 25/00:00:bf:49:38/00:01:94:00:00/e0 tag 0 dma 131072 in [51253.031526] res 40/00:00:00:00:00/84:01:09:00:00/00 Emask 0x24 (host bus error) [51253.036463] ata4.00: status: { DRDY } [51253.038863] ata4: soft resetting link [51253.339048] ata4.00: configured for UDMA/33 [51253.339055] ata4.00: device reported invalid CHS sector 0 [51253.339066] ata4: EH complete [51288.008028] ata4: lost interrupt (Status 0x51) [51288.008050] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen [51288.010468] ata4.00: BMDMA stat 0x26, BMDMA stat 0x0, BMDMA stat 0x0, BMDMA stat 0x0, BMDMA stat 0x0 [51288.013096] ata4.00: failed command: READ DMA EXT [51288.015506] ata4.00: cmd 25/00:00:bf:5f:38/00:01:94:00:00/e0 tag 0 dma 131072 in [51288.015509] res 40/00:00:00:00:00/84:01:09:00:00/00 Emask 0x24 (host bus error) [51288.020517] ata4.00: status: { DRDY } [51288.022906] ata4: soft resetting link [51288.339041] ata4.00: configured for UDMA/33 [51288.339049] ata4.00: device reported invalid CHS sector 0 [51288.339059] ata4: EH complete My kernel is stock except for BFS scheduler patches. I don't see how that could cause this. Best Regards Mikko Korkalo -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
