RonP

Need help interpreting my preclear.sh results. I selected to have the result emailed to me per the Configuration Tutorial (./preclear_disk.sh -m [email protected] /dev/sdX) and received the email attached below. With the exception of UDMA_CRC_Error_Count (I put in two drives but one of the two was an open box so it wasn't perfectly new, it is possible the Error Count occurred on other hardware, the value didn't change from pre to post so I'm pretty sure there is no issue with the CRC error count) the only other issue is "Postread detected un-expected non-zero bytes on disk". I've read the forums and it is clear that some bytes were non-zero even after being zeroed out. I have a few questions: 1) The subject line of the email was "Preclear: PASS! Preclearing Disk sdi Finished!!! Cycle 1 of 1". I'm thrown off by the "PASS!" as that contradicts the "Disk /dev/sdi has NOT been successfully precleared ". Am I missing something? 2) The forums suggest that a "postread" issue could be attributable to a lot of issues and to start with a memory check and then a dd/checksum test. I think I've done enough reading to know what I need to do so I'm primarily asking for validation: a) I had previously precleared a smaller drive (500 MB) without error, does that help isolate the problem with this result? b) For the memory test, I read a post Joe L. made (http://lime-technology.com/forum/index.php?topic=23753.0) and will do a memory check tonight. I have 2 GB of ram on this machine, while I was running two preclears on 3TB drives (I didn't have any array running), I did install Plex Media Server (although didn't enable it) including doing a wget, used the unMenu package manager to install infozip. I wouldn't think any of those things would be memory intensive and/or contribute to issues but thought I would mention them. I'll know more once I run a memory check but thought I'd ask, if anything I did might have contributed to the post read issues. c) For the dd /checksum test, I've found two points of information that I think verify what I need to do. The first is the unRAID section on How To Troubleshoot Recurring Parity Errors and the other is Joe L's post at the bottom of this forum page (http://lime-technology.com/forum/index.php?topic=19975.0). From what I gather, I need to take a look in /tmp/postread_errorssda to find which blocks to check. I can then repeat some of the specific post read checks as Joe outlined in his posting. I can also run a checksum per the FAQ multiple times covering the same blocks to see if there is a consistency issue. Am I on the right track? 3) My final question is do I just re-run the pre-clear or what do I do if I find issues with the above. Forgot to mention (in case it is useful information) that the disks are connected directly to the motherboard (ASUS M2N32-SLI Deluxe) with a AMD Athlon X2 BE-2350 Brisbane 2.1GHz. I did not disable unnecessary ports in the BIOS as I'm using this box during transition to dual boot into a Windows machine that has Plex and the old drive I'll be transferring. Email follows.... ========================================================================1.13 == invoked as: ./preclear_disk.sh -m [email protected] /dev/sdi == == Disk /dev/sdi has NOT been successfully precleared == Postread detected un-expected non-zero bytes on disk== == Ran 1 cycle == == Using :Read block size = 8225280 Bytes == Last Cycle's Pre Read Time : 8:56:52 (93 MB/s) == Last Cycle's Zeroing time : 7:49:47 (106 MB/s) == Last Cycle's Post Read Time : 19:23:14 (42 MB/s) == Last Cycle's Total Time : 36:10:53 == == Total Elapsed Time 36:10:53 == == Disk Start Temperature: 36C == == Current Disk Temperature: 28C, == ============================================================================ ** Changed attributes in files: /tmp/smart_start_sdi /tmp/smart_finish_sdi ATTRIBUTE NEW_VAL OLD_VAL FAILURE_THRESHOLD STATUS RAW_VALUE Seek_Error_Rate = 100 200 0 ok 0 Temperature_Celsius = 122 114 0 ok 28 No SMART attributes are FAILING_NOW 0 sectors were pending re-allocation before the start of the preclear. 0 sectors were pending re-allocation after pre-read in cycle 1 of 1. 0 sectors were pending re-allocation after zero of disk in cycle 1 of 1. 0 sectors are pending re-allocation at the end of the preclear, the number of sectors pending re-allocation did not change. 0 sectors had been re-allocated before the start of the preclear. 0 sectors are re-allocated at the end of the preclear, the number of sectors re-allocated did not change. ============================================================================ ============================================================================ == == S.M.A.R.T Initial Report for /dev/sdi == Disk: /dev/sdi smartctl 5.40 2010-10-16 r3189 [i486-slackware-linux-gnu] (local build) Copyright © 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Device Model: WDC WD30EFRX-68AX9N0 Serial Number: WD-WMC1T1001327 Firmware Version: 80.00A80 User Capacity: 3,000,592,982,016 bytes Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 9 ATA Standard is: Exact ATA specification draft version not indicated Local Time is: Mon Feb 25 00:28:18 2013 CST 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: (0x00) Offline data collection activity was never started. Auto Offline Data Collection: Disabled. 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: (42600) 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: (0x70bd) 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 0x002f 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0027 185 174 021 Pre-fail Always - 5708 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 17 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 51 10 Spin_Retry_Count 0x0032 100 253 000 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 - 14 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 9 193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 7 194 Temperature_Celsius 0x0022 114 109 000 Old_age Always - 36 196 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 100 253 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 17 200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 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. == ============================================================================ ============================================================================ == == S.M.A.R.T Final Report for /dev/sdi == Disk: /dev/sdi smartctl 5.40 2010-10-16 r3189 [i486-slackware-linux-gnu] (local build) Copyright © 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Device Model: WDC WD30EFRX-68AX9N0 Serial Number: WD-WMC1T1001327 Firmware Version: 80.00A80 User Capacity: 3,000,592,982,016 bytes Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 9 ATA Standard is: Exact ATA specification draft version not indicated Local Time is: Tue Feb 26 12:39:11 2013 CST 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: (0x00) Offline data collection activity was never started. Auto Offline Data Collection: Disabled. 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: (42600) 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: (0x70bd) 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 0x002f 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0027 185 174 021 Pre-fail Always - 5708 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 17 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 100 100 000 Old_age Always - 87 10 Spin_Retry_Count 0x0032 100 253 000 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 - 14 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 9 193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 7 194 Temperature_Celsius 0x0022 122 109 000 Old_age Always - 28 196 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 100 253 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 17 200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 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. == ============================================================================