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From: Barbara <bar...@li...> - 2011-01-10 00:42:39
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Hi, I have a Seagate Barracuda 7200.11 ST31000528AS and I was experiencing some timeout using the FreeBSD ahci driver while connected to a SATA2 controller. When this was happening the drive become unusable until the next reboot (maybe because on that controller the ahci driver doesn't handle gracefully the problem that I'm going to describe? But that's another story). So I've connected the drive to a different, controller (SATA1) on the same pc as I had to copy about 200 gb of files, from the 1st out of 4 partitions, to a USB backup drive. The copy was taking a lot of time, but in my mind the cause was the USB interface of the destination drive. Then I noticed that the speed was far below the limit of the USB interface: the average was 4 mb/s. Doing some tests using gstat ( http://goo.gl/HiIRI ), I noticed that the USB drive seems ok, but the ST31000528AS read some file at 120 mb/s avrg., some other slower and some at just 4 mb/s which looks lousy for sata, even if not sata2. It seems that the first files on the partition are read fast, then suddenly the speed drop, which should be "normal" but I think not it that terms. Recently I did some test with smartctl, but I thought they were ok. Anyway I noticed that some values like "Seek_Error_Rate", "Head_Flying_Hours", "Raw_Read_Error_Rate" and "Hardware_ECC_Recovered" are significantly changing while reading the files (the first twos increasing, the others decreasing) but I don't understand them and I don't know if it's normal. I did also a short test with SeaTools for DOS which reported no problem. Below and at http://pastebin.com/tP1isD5u you will find smartctl details about the device. Doing some searches I've found some scaring thing about that drive like this http://goo.gl/1j99D, but I don't know if they are true or are just to terrify people and get some customer. Any idea of what's going on and about the cause of the speed dropping? Do you think that the HD is "silently" dying? Thanks Barbara # smartctl -a /dev/ada2 smartctl 5.40 2010-10-16 r3189 [FreeBSD 9.0-CURRENT i386] (local build) Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Model Family: Seagate Barracuda 7200.12 family Device Model: ST31000528AS Serial Number: 9VP0HETT Firmware Version: CC44 User Capacity: 1,000,204,886,016 bytes Device is: In smartctl database [for details use: -P show] ATA Version is: 8 ATA Standard is: ATA-8-ACS revision 4 Local Time is: Mon Jan 10 01:06:56 2011 CET 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: ( 600) 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: ( 1) minutes. Extended self-test routine recommended polling time: ( 195) minutes. Conveyance self-test routine recommended polling time: ( 2) minutes. SCT capabilities: (0x103f) SCT Status supported. SCT Error Recovery Control supported. SCT Feature Control supported. SCT Data Table supported. 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 113 099 006 Pre-fail Always - 58684958 3 Spin_Up_Time 0x0003 096 094 000 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 099 099 020 Old_age Always - 1539 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 7 Seek_Error_Rate 0x000f 073 060 030 Pre-fail Always - 22301495 9 Power_On_Hours 0x0032 094 094 000 Old_age Always - 5722 10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 099 099 020 Old_age Always - 1560 183 Runtime_Bad_Block 0x0000 100 100 000 Old_age Offline - 0 184 End-to-End_Error 0x0032 100 100 099 Old_age Always - 0 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0 188 Command_Timeout 0x0032 100 092 000 Old_age Always - 472453611632 189 High_Fly_Writes 0x003a 099 099 000 Old_age Always - 1 190 Airflow_Temperature_Cel 0x0022 073 059 045 Old_age Always - 27 (Min/Max 23/28) 194 Temperature_Celsius 0x0022 027 041 000 Old_age Always - 27 (0 11 0 0) 195 Hardware_ECC_Recovered 0x001a 044 021 000 Old_age Always - 58684958 197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 4 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 4 199 UDMA_CRC_Error_Count 0x003e 200 001 000 Old_age Always - 23645 240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline - 90585155249333 241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 1613735744 242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 2209396019 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% 5720 - # 2 Extended offline Completed without error 00% 5542 - # 3 Short offline Completed without error 00% 5474 - # 4 Short offline Completed without error 00% 4866 - # 5 Conveyance offline Completed without error 00% 2138 - # 6 Short offline Completed without error 00% 2138 - # 7 Short offline Completed without error 00% 9 - # 8 Short offline Completed without error 00% 0 - 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. |
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