why would I get a segmentation fault on one system but not the other?
jd1008
jd1008 at gmail.com
Mon Feb 23 19:07:49 UTC 2015
On 02/22/2015 08:31 PM, David Benfell wrote:
> On Sun, Feb 22, 2015 at 02:12:05PM -0700, jd1008 wrote:
>> The only thing left for me to guess at is
>> that you might possibly have hard disk errors
>> either at the spots (sectors) where the binary lives
>> or at the spots in the swap partition where the data
>> and stack pages of the application get paged out to.
>> Do you have any errors logged in messages (kernel logs)??
>>
> Just found this and checked. No, nothing of the sort is logged. Just
> to be sure, I did a copy from the library that seems problematic to
> /dev/null and checked /var/log/messages again. Still nothing.
>
> I don't quite understand how to interpret all of the following, but it
> says no errors:
>
> vegan# smartctl -a /dev/ada0
> smartctl 6.3 2014-07-26 r3976 [FreeBSD 10.1-STABLE amd64] (local
> build)
> Copyright (C) 2002-14, Bruce Allen, Christian Franke,
> www.smartmontools.org
>
> === START OF INFORMATION SECTION ===
> Model Family: Toshiba 3.5" HDD DT01ACA...
> Device Model: TOSHIBA DT01ACA300
> Serial Number: X4ENH8BGS
> LU WWN Device Id: 5 000039 ff4e57fc0
> Firmware Version: MX6OABB0
> User Capacity: 3,000,592,982,016 bytes [3.00 TB]
> Sector Sizes: 512 bytes logical, 4096 bytes physical
> Rotation Rate: 7200 rpm
> Form Factor: 3.5 inches
> Device is: In smartctl database [for details use: -P show]
> ATA Version is: ATA8-ACS T13/1699-D revision 4
> SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
> Local Time is: Sun Feb 22 19:29:57 2015 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: (0x80) Offline data collection
> activity
> was never started.
> 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: (22078) 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: ( 368) minutes.
> SCT capabilities: (0x003d) SCT Status supported.
> SCT Error Recovery Control
> 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 0x000b 100 100 016 Pre-fail
> Always - 0
> 2 Throughput_Performance 0x0005 139 139 054 Pre-fail
> Offline - 71
> 3 Spin_Up_Time 0x0007 100 100 024 Pre-fail
> Always - 389
> 4 Start_Stop_Count 0x0012 100 100 000 Old_age
> Always - 8
> 5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail
> Always - 0
> 7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail
> Always - 0
> 8 Seek_Time_Performance 0x0005 124 124 020 Pre-fail
> Offline - 33
> 9 Power_On_Hours 0x0012 100 100 000 Old_age
> Always - 100
> 10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail
> Always - 0
> 12 Power_Cycle_Count 0x0032 100 100 000 Old_age
> Always - 8
> 192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age
> Always - 9
> 193 Load_Cycle_Count 0x0012 100 100 000 Old_age
> Always - 9
> 194 Temperature_Celsius 0x0002 214 214 000 Old_age
> Always - 28 (Min/Max 20/31)
> 196 Reallocated_Event_Count 0x0032 100 100 000 Old_age
> Always - 0
> 197 Current_Pending_Sector 0x0022 100 100 000 Old_age
> Always - 0
> 198 Offline_Uncorrectable 0x0008 100 100 000 Old_age
> Offline - 0
> 199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age
> Always - 0
>
> SMART Error Log Version: 1
> No Errors Logged
>
> SMART Self-test log structure revision number 1
> No self-tests have been logged. [To run self-tests, use: smartctl -t]
>
> 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.
>
> Thanks!
>
OK, so how old is the hard drive?
I have issues with smartctl labeling drives as being in prefail condition.
I have heard from HD experts that smartctl cannot be relied upon in
making such a judgement.
Regards,
JD
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