March 1, 201313 yr I got these results. ========================================================================1.13 == invoked as: ./preclear_disk.sh /dev/sdc == WDC WD30EZRX-00MMMB0 WD-WCAWZ1429975 == Disk /dev/sdc has been successfully precleared == with a starting sector of 1 == Ran 1 cycle == == Using :Read block size = 8225280 Bytes == Last Cycle's Pre Read Time : 9:41:03 (86 MB/s) == Last Cycle's Zeroing time : 8:36:47 (96 MB/s) == Last Cycle's Post Read Time : 24:43:55 (33 MB/s) == Last Cycle's Total Time : 43:02:46 == == Total Elapsed Time 43:02:46 == == Disk Start Temperature: 27C == == Current Disk Temperature: 32C, == ============================================================================ ** Changed attributes in files: /tmp/smart_start_sdc /tmp/smart_finish_sdc ATTRIBUTE NEW_VAL OLD_VAL FAILURE_THRESHOLD STATUS RAW_VALUE Seek_Error_Rate = 100 200 0 ok 0 Temperature_Celsius = 120 125 0 ok 32 Current_Pending_Sector = 66 199 0 ok 65528 No SMART attributes are FAILING_NOW 495 sectors were pending re-allocation before the start of the preclear. 496 sectors were pending re-allocation after pre-read in cycle 1 of 1. 65528 sectors were pending re-allocation after zero of disk in cycle 1 of 1. 65528 sectors are pending re-allocation at the end of the preclear, a change of 65033 in the number of sectors pending re-allocation. 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. ============================================================================ ========================================================================1.13 == invoked as: ./preclear_disk.sh /dev/sdc == WDC WD30EZRX-00MMMB0 WD-WCAWZ1429975 == Disk /dev/sdc has been successfully precleared == with a starting sector of 1 == Ran 1 cycle == == Using :Read block size = 8225280 Bytes == Last Cycle's Pre Read Time : 9:24:28 (88 MB/s) == Last Cycle's Zeroing time : 8:47:49 (94 MB/s) == Last Cycle's Post Read Time : 24:24:44 (34 MB/s) == Last Cycle's Total Time : 42:38:02 == == Total Elapsed Time 42:38:02 == == Disk Start Temperature: 30C == == Current Disk Temperature: 32C, == ============================================================================ ** Changed attributes in files: /tmp/smart_start_sdc /tmp/smart_finish_sdc ATTRIBUTE NEW_VAL OLD_VAL FAILURE_THRESHOLD STATUS RAW_VALUE Raw_Read_Error_Rate = 197 196 51 ok 26655 Power_On_Hours = 86 87 0 ok 10231 Temperature_Celsius = 120 122 0 ok 32 No SMART attributes are FAILING_NOW 65528 sectors were pending re-allocation before the start of the preclear. 65528 sectors were pending re-allocation after pre-read in cycle 1 of 1. 65528 sectors were pending re-allocation after zero of disk in cycle 1 of 1. 65528 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. ============================================================================ ========================================================================1.13 == invoked as: ./preclear_disk.sh /dev/sdc == WDC WD30EZRX-00MMMB0 WD-WCAWZ1429975 == Disk /dev/sdc has been successfully precleared == with a starting sector of 1 == Ran 1 cycle == == Using :Read block size = 8225280 Bytes == Last Cycle's Pre Read Time : 9:24:59 (88 MB/s) == Last Cycle's Zeroing time : 8:36:52 (96 MB/s) == Last Cycle's Post Read Time : 25:01:26 (33 MB/s) == Last Cycle's Total Time : 43:04:17 == == Total Elapsed Time 43:04:17 == == Disk Start Temperature: 29C == == Current Disk Temperature: 32C, == ============================================================================ ** Changed attributes in files: /tmp/smart_start_sdc /tmp/smart_finish_sdc ATTRIBUTE NEW_VAL OLD_VAL FAILURE_THRESHOLD STATUS RAW_VALUE Temperature_Celsius = 120 123 0 ok 32 No SMART attributes are FAILING_NOW 65528 sectors were pending re-allocation before the start of the preclear. 65528 sectors were pending re-allocation after pre-read in cycle 1 of 1. 65528 sectors were pending re-allocation after zero of disk in cycle 1 of 1. 65528 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. ============================================================================ ========================================================================1.13 == invoked as: ./preclear_disk.sh /dev/sdc == WDC WD30EZRX-00MMMB0 WD-WCAWZ1429975 == Disk /dev/sdc has been successfully precleared == with a starting sector of 1 == Ran 1 cycle == == Using :Read block size = 8225280 Bytes == Last Cycle's Pre Read Time : 9:21:40 (88 MB/s) == Last Cycle's Zeroing time : 8:39:25 (96 MB/s) == Last Cycle's Post Read Time : 24:35:43 (33 MB/s) == Last Cycle's Total Time : 42:37:49 == == Total Elapsed Time 42:37:49 == == Disk Start Temperature: 27C == == Current Disk Temperature: 31C, == ============================================================================ ** Changed attributes in files: /tmp/smart_start_sdc /tmp/smart_finish_sdc ATTRIBUTE NEW_VAL OLD_VAL FAILURE_THRESHOLD STATUS RAW_VALUE Raw_Read_Error_Rate = 198 197 51 ok 26663 Seek_Error_Rate = 100 200 0 ok 0 Temperature_Celsius = 121 125 0 ok 31 No SMART attributes are FAILING_NOW 65528 sectors were pending re-allocation before the start of the preclear. 65528 sectors were pending re-allocation after pre-read in cycle 1 of 1. 65528 sectors were pending re-allocation after zero of disk in cycle 1 of 1. 65528 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. ============================================================================ Since the number of sectors re-allocated did not change with 4 preclears, would this dive be ok to use in the array? If not how about a cache drive?
March 1, 201313 yr I would not trust that drive at all. the SMART attribute for sector pending re-allocation is very weird... I might suspect poor power to the drive, since it seems it was able to write the original set of sectors pending re-allocation in place, but the huge numbers I'm seeing are really bad. I would test that disk with the manufacturer's own test disk. Joe L.
March 1, 201313 yr Author I already ran the manufacturer's drive test and it passed the extended test and the write zeros. I did that between the 3rd and 4th preclear. I have 2 other drives also showing the same kind of results but just not so many sectors.
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