mmsood99 Posted May 6, 2012 Share Posted May 6, 2012 First time user of unRAID and trying to build my first system Preclear failed on the very first drive I tried, complaining of unexpected non-zero data. This implies the step of writing all zero bytes has failed, right? I'd be grateful for any guidance - is the drive toast? Thanks mmsood99 ========================================================================1.13 == == Disk /dev/sda 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 : 6:06:58 (90 MB/s) == Last Cycle's Zeroing time : 5:39:22 (98 MB/s) == Last Cycle's Post Read Time : 11:58:54 (46 MB/s) == Last Cycle's Total Time : 23:46:23 == == Total Elapsed Time 23:46:23 == == Disk Start Temperature: 21C == == Current Disk Temperature: 23C, == ============================================================================ 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/sda == Disk: /dev/sda 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: SAMSUNG HD204UI Serial Number: S2H7J1CZ914365 Firmware Version: 1AQ10001 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: ATA-8-ACS revision 6 Local Time is: Sat May 5 15:38:04 2012 EDT 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: (20820) 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: ( 2) minutes. Extended self-test routine recommended polling time: ( 255) minutes. SCT capabilities: (0x003f) 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 100 100 051 Pre-fail Always - 0 2 Throughput_Performance 0x0026 252 252 000 Old_age Always - 0 3 Spin_Up_Time 0x0023 067 066 025 Pre-fail Always - 10221 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 11 5 Reallocated_Sector_Ct 0x0033 252 252 010 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 252 252 051 Old_age Always - 0 8 Seek_Time_Performance 0x0024 252 252 015 Old_age Offline - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 2 10 Spin_Retry_Count 0x0032 252 252 051 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 252 252 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 43 181 Program_Fail_Cnt_Total 0x0022 100 100 000 Old_age Always - 202 191 G-Sense_Error_Rate 0x0022 252 252 000 Old_age Always - 0 192 Power-Off_Retract_Count 0x0022 252 252 000 Old_age Always - 0 194 Temperature_Celsius 0x0002 064 064 000 Old_age Always - 21 (Min/Max 16/22) 195 Hardware_ECC_Recovered 0x003a 100 100 000 Old_age Always - 0 196 Reallocated_Event_Count 0x0032 252 252 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 252 252 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 252 252 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0036 100 100 000 Old_age Always - 1 200 Multi_Zone_Error_Rate 0x002a 100 100 000 Old_age Always - 0 223 Load_Retry_Count 0x0032 252 252 000 Old_age Always - 0 225 Load_Cycle_Count 0x0032 100 100 000 Old_age Always - 46 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] Note: selective self-test log revision number (0) not 1 implies that no selective self-test has ever been run SMART Selective self-test log data structure revision number 0 Note: revision number not 1 implies that no selective self-test has ever been run SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Completed [00% left] (0-65535) 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/sda == Disk: /dev/sda 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: SAMSUNG HD204UI Serial Number: S2H7J1CZ914365 Firmware Version: 1AQ10001 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: ATA-8-ACS revision 6 Local Time is: Sun May 6 15:24:27 2012 EDT 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: (20820) 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: ( 2) minutes. Extended self-test routine recommended polling time: ( 255) minutes. SCT capabilities: (0x003f) 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 100 100 051 Pre-fail Always - 1 2 Throughput_Performance 0x0026 252 252 000 Old_age Always - 0 3 Spin_Up_Time 0x0023 067 066 025 Pre-fail Always - 10221 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 11 5 Reallocated_Sector_Ct 0x0033 252 252 010 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 252 252 051 Old_age Always - 0 8 Seek_Time_Performance 0x0024 252 252 015 Old_age Offline - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 25 10 Spin_Retry_Count 0x0032 252 252 051 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 252 252 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 43 181 Program_Fail_Cnt_Total 0x0022 100 100 000 Old_age Always - 202 191 G-Sense_Error_Rate 0x0022 252 252 000 Old_age Always - 0 192 Power-Off_Retract_Count 0x0022 252 252 000 Old_age Always - 0 194 Temperature_Celsius 0x0002 064 064 000 Old_age Always - 23 (Min/Max 16/24) 195 Hardware_ECC_Recovered 0x003a 100 100 000 Old_age Always - 0 196 Reallocated_Event_Count 0x0032 252 252 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 252 252 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 252 252 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0036 100 100 000 Old_age Always - 1 200 Multi_Zone_Error_Rate 0x002a 100 100 000 Old_age Always - 0 223 Load_Retry_Count 0x0032 252 252 000 Old_age Always - 0 225 Load_Cycle_Count 0x0032 100 100 000 Old_age Always - 46 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] Note: selective self-test log revision number (0) not 1 implies that no selective self-test has ever been run SMART Selective self-test log data structure revision number 0 Note: revision number not 1 implies that no selective self-test has ever been run SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Completed [00% left] (0-65535) 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. == ============================================================================ Quote Link to comment
mmsood99 Posted May 6, 2012 Author Share Posted May 6, 2012 More info - looks like a bad drive - would you concur? from /tmp/postread_errorssda skip=200 count=200 bs=8225280 returned 08598 instead of 00000 skip=600 count=200 bs=8225280 returned 02478 instead of 00000 skip=800 count=200 bs=8225280 returned 55415 instead of 00000 skip=1000 count=200 bs=8225280 returned 01390 instead of 00000 skip=1200 count=200 bs=8225280 returned 06591 instead of 00000 skip=1400 count=200 bs=8225280 returned 54484 instead of 00000 skip=1800 count=200 bs=8225280 returned 16651 instead of 00000 skip=2000 count=200 bs=8225280 returned 05943 instead of 00000 skip=2200 count=200 bs=8225280 returned 48886 instead of 00000 skip=2400 count=200 bs=8225280 returned 22257 instead of 00000 skip=2600 count=200 bs=8225280 returned 52409 instead of 00000 skip=3600 count=200 bs=8225280 returned 63969 instead of 00000 skip=3800 count=200 bs=8225280 returned 03716 instead of 00000 skip=4000 count=200 bs=8225280 returned 58605 instead of 00000 skip=4200 count=200 bs=8225280 returned 18744 instead of 00000 skip=4600 count=200 bs=8225280 returned 52819 instead of 00000 skip=4800 count=200 bs=8225280 returned 63530 instead of 00000 skip=5800 count=200 bs=8225280 returned 10314 instead of 00000 skip=6000 count=200 bs=8225280 returned 31462 instead of 00000 skip=6200 count=200 bs=8225280 returned 44350 instead of 00000 skip=6400 count=200 bs=8225280 returned 17100 instead of 00000 skip=6600 count=200 bs=8225280 returned 46986 instead of 00000 skip=6800 count=200 bs=8225280 returned 23896 instead of 00000 skip=7400 count=200 bs=8225280 returned 61737 instead of 00000 skip=7600 count=200 bs=8225280 returned 01545 instead of 00000 skip=8000 count=200 bs=8225280 returned 13930 instead of 00000 skip=8600 count=200 bs=8225280 returned 40486 instead of 00000 skip=8800 count=200 bs=8225280 returned 60960 instead of 00000 skip=9000 count=200 bs=8225280 returned 64569 instead of 00000 skip=9400 count=200 bs=8225280 returned 54896 instead of 00000 skip=9600 count=200 bs=8225280 returned 06446 instead of 00000 skip=9800 count=200 bs=8225280 returned 51373 instead of 00000 skip=10000 count=200 bs=8225280 returned 11531 instead of 00000 skip=10200 count=200 bs=8225280 returned 40760 instead of 00000 skip=10600 count=200 bs=8225280 returned 20328 instead of 00000 skip=10800 count=200 bs=8225280 returned 42892 instead of 00000 skip=11000 count=200 bs=8225280 returned 31047 instead of 00000 skip=11600 count=200 bs=8225280 returned 15504 instead of 00000 skip=12000 count=200 bs=8225280 returned 58252 instead of 00000 skip=12200 count=200 bs=8225280 returned 07077 instead of 00000 skip=12400 count=200 bs=8225280 returned 29804 instead of 00000 skip=13000 count=200 bs=8225280 returned 35785 instead of 00000 skip=13800 count=200 bs=8225280 returned 41728 instead of 00000 skip=14400 count=200 bs=8225280 returned 45788 instead of 00000 skip=15400 count=200 bs=8225280 returned 13356 instead of 00000 skip=15600 count=200 bs=8225280 returned 31125 instead of 00000 skip=16200 count=200 bs=8225280 returned 33023 instead of 00000 skip=16400 count=200 bs=8225280 returned 64679 instead of 00000 skip=16600 count=200 bs=8225280 returned 51745 instead of 00000 skip=16800 count=200 bs=8225280 returned 62635 instead of 00000 skip=17200 count=200 bs=8225280 returned 60651 instead of 00000 skip=17800 count=200 bs=8225280 returned 28580 instead of 00000 skip=18000 count=200 bs=8225280 returned 31655 instead of 00000 skip=18200 count=200 bs=8225280 returned 46990 instead of 00000 skip=18800 count=200 bs=8225280 returned 42351 instead of 00000 skip=19000 count=200 bs=8225280 returned 43535 instead of 00000 skip=20400 count=200 bs=8225280 returned 28769 instead of 00000 skip=20600 count=200 bs=8225280 returned 64920 instead of 00000 skip=21000 count=200 bs=8225280 returned 36252 instead of 00000 skip=21200 count=200 bs=8225280 returned 02824 instead of 00000 skip=21400 count=200 bs=8225280 returned 58361 instead of 00000 skip=21600 count=200 bs=8225280 returned 40091 instead of 00000 skip=22000 count=200 bs=8225280 returned 42906 instead of 00000 skip=22400 count=200 bs=8225280 returned 50078 instead of 00000 skip=22600 count=200 bs=8225280 returned 29208 instead of 00000 skip=22800 count=200 bs=8225280 returned 29569 instead of 00000 skip=23000 count=200 bs=8225280 returned 27277 instead of 00000 skip=23200 count=200 bs=8225280 returned 61258 instead of 00000 skip=23800 count=200 bs=8225280 returned 60285 instead of 00000 skip=24000 count=200 bs=8225280 returned 41491 instead of 00000 skip=24400 count=200 bs=8225280 returned 62026 instead of 00000 skip=24800 count=200 bs=8225280 returned 25303 instead of 00000 skip=25200 count=200 bs=8225280 returned 39547 instead of 00000 skip=25400 count=200 bs=8225280 returned 64514 instead of 00000 skip=25800 count=200 bs=8225280 returned 64335 instead of 00000 skip=26000 count=200 bs=8225280 returned 40684 instead of 00000 skip=26200 count=200 bs=8225280 returned 37608 instead of 00000 skip=26600 count=200 bs=8225280 returned 01903 instead of 00000 skip=27000 count=200 bs=8225280 returned 29440 instead of 00000 skip=27800 count=200 bs=8225280 returned 00992 instead of 00000 skip=28200 count=200 bs=8225280 returned 21040 instead of 00000 skip=28600 count=200 bs=8225280 returned 48220 instead of 00000 skip=29000 count=200 bs=8225280 returned 51342 instead of 00000 skip=29200 count=200 bs=8225280 returned 27743 instead of 00000 skip=29400 count=200 bs=8225280 returned 30388 instead of 00000 skip=30200 count=200 bs=8225280 returned 54284 instead of 00000 skip=30400 count=200 bs=8225280 returned 63397 instead of 00000 skip=30800 count=200 bs=8225280 returned 01438 instead of 00000 skip=31400 count=200 bs=8225280 returned 61952 instead of 00000 skip=31800 count=200 bs=8225280 returned 02903 instead of 00000 skip=32000 count=200 bs=8225280 returned 63390 instead of 00000 skip=32200 count=200 bs=8225280 returned 18014 instead of 00000 skip=32400 count=200 bs=8225280 returned 27372 instead of 00000 skip=32800 count=200 bs=8225280 returned 40016 instead of 00000 skip=33200 count=200 bs=8225280 returned 01397 instead of 00000 skip=33400 count=200 bs=8225280 returned 02306 instead of 00000 skip=33600 count=200 bs=8225280 returned 60874 instead of 00000 skip=33800 count=200 bs=8225280 returned 37886 instead of 00000 skip=34000 count=200 bs=8225280 returned 39152 instead of 00000 skip=34200 count=200 bs=8225280 returned 30182 instead of 00000 skip=34400 count=200 bs=8225280 returned 12214 instead of 00000 skip=34600 count=200 bs=8225280 returned 15865 instead of 00000 skip=34800 count=200 bs=8225280 returned 59825 instead of 00000 skip=35000 count=200 bs=8225280 returned 14828 instead of 00000 skip=35200 count=200 bs=8225280 returned 55623 instead of 00000 skip=35400 count=200 bs=8225280 returned 00614 instead of 00000 skip=35600 count=200 bs=8225280 returned 00138 instead of 00000 skip=36000 count=200 bs=8225280 returned 15076 instead of 00000 skip=36200 count=200 bs=8225280 returned 17479 instead of 00000 skip=36600 count=200 bs=8225280 returned 14793 instead of 00000 skip=37000 count=200 bs=8225280 returned 58819 instead of 00000 skip=37200 count=200 bs=8225280 returned 25943 instead of 00000 skip=37400 count=200 bs=8225280 returned 05553 instead of 00000 skip=37600 count=200 bs=8225280 returned 11295 instead of 00000 skip=38000 count=200 bs=8225280 returned 16123 instead of 00000 skip=38200 count=200 bs=8225280 returned 24543 instead of 00000 skip=38600 count=200 bs=8225280 returned 49300 instead of 00000 skip=39000 count=200 bs=8225280 returned 42221 instead of 00000 skip=39200 count=200 bs=8225280 returned 18299 instead of 00000 skip=39400 count=200 bs=8225280 returned 10129 instead of 00000 skip=39800 count=200 bs=8225280 returned 37874 instead of 00000 skip=40000 count=200 bs=8225280 returned 02959 instead of 00000 skip=40400 count=200 bs=8225280 returned 39323 instead of 00000 skip=40800 count=200 bs=8225280 returned 37405 instead of 00000 skip=41000 count=200 bs=8225280 returned 60438 instead of 00000 skip=41200 count=200 bs=8225280 returned 50649 instead of 00000 skip=41400 count=200 bs=8225280 returned 14191 instead of 00000 skip=41800 count=200 bs=8225280 returned 64719 instead of 00000 skip=42200 count=200 bs=8225280 returned 20342 instead of 00000 skip=42400 count=200 bs=8225280 returned 53736 instead of 00000 skip=42800 count=200 bs=8225280 returned 21994 instead of 00000 skip=43200 count=200 bs=8225280 returned 50890 instead of 00000 skip=43400 count=200 bs=8225280 returned 29695 instead of 00000 skip=43600 count=200 bs=8225280 returned 31177 instead of 00000 skip=44000 count=200 bs=8225280 returned 41886 instead of 00000 skip=44200 count=200 bs=8225280 returned 48303 instead of 00000 skip=44600 count=200 bs=8225280 returned 24739 instead of 00000 skip=44800 count=200 bs=8225280 returned 53658 instead of 00000 skip=45000 count=200 bs=8225280 returned 39181 instead of 00000 skip=45200 count=200 bs=8225280 returned 11373 instead of 00000 skip=45600 count=200 bs=8225280 returned 62156 instead of 00000 skip=45800 count=200 bs=8225280 returned 15109 instead of 00000 skip=46000 count=200 bs=8225280 returned 60745 instead of 00000 skip=46200 count=200 bs=8225280 returned 11451 instead of 00000 skip=46600 count=200 bs=8225280 returned 33773 instead of 00000 skip=47000 count=200 bs=8225280 returned 63192 instead of 00000 skip=47800 count=200 bs=8225280 returned 19334 instead of 00000 skip=48400 count=200 bs=8225280 returned 31082 instead of 00000 skip=48600 count=200 bs=8225280 returned 31418 instead of 00000 skip=48800 count=200 bs=8225280 returned 32108 instead of 00000 skip=49200 count=200 bs=8225280 returned 06039 instead of 00000 skip=49600 count=200 bs=8225280 returned 06006 instead of 00000 skip=49800 count=200 bs=8225280 returned 27406 instead of 00000 skip=50000 count=200 bs=8225280 returned 17981 instead of 00000 skip=50200 count=200 bs=8225280 returned 08241 instead of 00000 skip=50400 count=200 bs=8225280 returned 02684 instead of 00000 skip=50600 count=200 bs=8225280 returned 46411 instead of 00000 skip=239800 count=200 bs=8225280 returned 56115 instead of 00000 skip=240200 count=200 bs=8225280 returned 42457 instead of 00000 skip=240400 count=200 bs=8225280 returned 49052 instead of 00000 skip=240600 count=200 bs=8225280 returned 38117 instead of 00000 skip=240800 count=200 bs=8225280 returned 62956 instead of 00000 skip=241000 count=200 bs=8225280 returned 65217 instead of 00000 skip=241200 count=200 bs=8225280 returned 46793 instead of 00000 skip=241600 count=200 bs=8225280 returned 36550 instead of 00000 skip=241800 count=200 bs=8225280 returned 00005 instead of 00000 skip=242000 count=200 bs=8225280 returned 24830 instead of 00000 skip=242200 count=200 bs=8225280 returned 54296 instead of 00000 skip=242800 count=200 bs=8225280 returned 54277 instead of 00000 skip=243000 count=200 bs=8225280 returned 60076 instead of 00000 skip=243001 count=200 bs=8225280 returned 60076 instead of 00000 Quote Link to comment
Joe L. Posted May 6, 2012 Share Posted May 6, 2012 Run a long SMART test. I doubt the long smart test will show anything, but who knows... I would run a memory test on your server. That could easily cause the data being written (or read back) improperly. Then, you can try the "dd" / "checksum" routines others have used. Quote Link to comment
mmsood99 Posted May 6, 2012 Author Share Posted May 6, 2012 Thanks Joe I will indeed run a memory test, but (forgive the newbie question), what is the dd/checksum test? Can you provide a reference so I can read up about it? Thanks mmsood99 Quote Link to comment
mmsood99 Posted May 6, 2012 Author Share Posted May 6, 2012 Sorry..scratch previous request Found info on dd/checksum testing Quote Link to comment
Joe L. Posted May 6, 2012 Share Posted May 6, 2012 Sorry..scratch previous request Found info on dd/checksum testing You actually have a lot of the info needed to perform the same types of tests as done by the post-read This is the command run by the post-read to check the second 200 blocks (where block-size = 8Meg) dd if=/dev/sda bs=8225280 count=200 skip=200 conv=noerror 2>/dev/null|sum| awk '{print $1}' It should print 00000 dd if=/dev/sda bs=8225280 count=200 skip=242800 conv=noerror 2>/dev/null|sum| awk '{print $1}' should also print 00000 You can do the same command multiple times, or try different number of blocks to "skip" to get to different sets if blocks on your disk. The results in you posted showed consistent errors from the beginning to the end of the physical disk. It could easily be a bad disk... or, a bad port on the disk controller, or bad memory. In any case, now that the disk is supposed to be zeroed, it should read all zeros. (could be the read is fine, but the write failed to write all zeros) In any case, it is far better you deal with this type of hardware problem before you add the drive to your array. Joe L. Quote Link to comment
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