I ran smartctl utility on both of my HDDs: # smartctl -a /dev/hdb smartctl version 5.37 [i686-pc-linux-gnu] Copyright (C) 2002-6 Bruce Allen Home page is http://smartmontools.sourceforge.net/ === START OF INFORMATION SECTION === Device Model: QUANTUM FIREBALL EX6.4A Serial Number: 376833611720 Firmware Version: A0A.0D00 User Capacity: 6,448,619,520 bytes Device is: In smartctl database [for details use: -P show] ATA Version is: 4 ATA Standard is: ATA/ATAPI-4 T13 1153D revision 15 Local Time is: Thu Mar 6 12:23:29 2008 PST 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. Total time to complete Offline data collection: ( 1) seconds. Offline data collection capabilities: (0x03) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. No Offline surface scan supported. No Self-test supported. No Conveyance Self-test supported. No Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x00) Error logging NOT supported. No General Purpose Logging support. SMART Attributes Data Structure revision number: 7 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x0029 100 100 020 Pre-fail Offline - 0 3 Spin_Up_Time 0x0027 077 076 020 Pre-fail Always - 2933 4 Start_Stop_Count 0x0032 099 099 008 Old_age Always - 1125 5 Reallocated_Sector_Ct 0x0033 100 100 020 Pre-fail Always - 0 7 Seek_Error_Rate 0x000b 100 100 023 Pre-fail Always - 0 9 Power_On_Hours 0x0012 012 012 001 Old_age Always - 57853 11 Calibration_Retry_Count 0x0013 100 100 020 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 099 099 008 Old_age Always - 1118 13 Read_Soft_Error_Rate 0x000b 100 100 023 Pre-fail Always - 0 199 UDMA_CRC_Error_Count 0x001a 200 200 000 Old_age Always - 0 Warning: device does not support Error Logging SMART Error Log Version: 0 No Errors Logged Warning: device does not support Self Test Logging SMART Self-test log structure revision number 0 Warning: ATA Specification requires self-test log structure revision number = 1 No self-tests have been logged. [To run self-tests, use: smartctl -t] Device does not support Selective Self Tests/Logging # smartctl -a /dev/hda smartctl version 5.37 [i686-pc-linux-gnu] Copyright (C) 2002-6 Bruce Allen Home page is http://smartmontools.sourceforge.net/ === START OF INFORMATION SECTION === Model Family: Seagate Barracuda 7200.7 and 7200.7 Plus family Device Model: ST380011A Serial Number: 4JV5P7LN Firmware Version: 8.01 User Capacity: 80,026,361,856 bytes Device is: In smartctl database [for details use: -P show] ATA Version is: 6 ATA Standard is: ATA/ATAPI-6 T13 1410D revision 2 Local Time is: Thu Mar 6 12:23:53 2008 PST 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: ( 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: ( 58) 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 059 057 006 Pre-fail Always - 52655116 3 Spin_Up_Time 0x0003 098 098 000 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 0 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 7 Seek_Error_Rate 0x000f 081 060 030 Pre-fail Always - 160182478 9 Power_On_Hours 0x0032 079 079 000 Old_age Always - 18950 10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 117 194 Temperature_Celsius 0x0022 027 048 000 Old_age Always - 27 195 Hardware_ECC_Recovered 0x001a 059 057 000 Old_age Always - 52655116 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 200 200 000 Old_age Always - 0 200 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 Extended offline Completed without error 00% 18674 - # 2 Extended offline Completed without error 00% 15957 - # 3 Extended offline Completed without error 00% 14448 - 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. I ran tests, but I don't know how to get the results: # smartctl --test=long /dev/hdb smartctl version 5.37 [i686-pc-linux-gnu] Copyright (C) 2002-6 Bruce Allen Home page is http://smartmontools.sourceforge.net/ === START OF OFFLINE IMMEDIATE AND SELF-TEST SECTION === Warning: device does not support Self-Test functions. Sending command: "Execute SMART Extended self-test routine immediately in off-line mode". Drive command "Execute SMART Extended self-test routine immediately in off-line mode" successful. Testing has begun. # smartctl --test=long /dev/hda smartctl version 5.37 [i686-pc-linux-gnu] Copyright (C) 2002-6 Bruce Allen Home page is http://smartmontools.sourceforge.net/ === START OF OFFLINE IMMEDIATE AND SELF-TEST SECTION === Sending command: "Execute SMART Extended self-test routine immediately in off-line mode". Drive command "Execute SMART Extended self-test routine immediately in off-line mode" successful. Testing has begun. Please wait 58 minutes for test to complete. Test will complete after Thu Mar 6 13:27:21 2008 Use smartctl -X to abort test