danioj Posted June 30, 2015 Share Posted June 30, 2015 Since these are still relatively new drives, I thought I'd post my preclear results for the 2 ST8000AS0002 I just installed: : ========================================================================1.15 : == invoked as: ./preclear_disk.sh /dev/sdb : == ST8000AS0002-1NA17Z Z8403xxx : == Disk /dev/sdb has been successfully precleared : == with a starting sector of 1 : == Ran 1 cycle : == : == Using :Read block size = 1000448 Bytes : == Last Cycle's Pre Read Time : 19:44:58 (112 MB/s) : == Last Cycle's Zeroing time : 16:22:29 (135 MB/s) : == Last Cycle's Post Read Time : 37:42:48 (58 MB/s) : == Last Cycle's Total Time : 73:51:20 : == : == Total Elapsed Time 73:51:20 : == : == Disk Start Temperature: 25C : == : == Current Disk Temperature: 37C, " : == : ============================================================================ : ** Changed attributes in files: /tmp/smart_start_sdb /tmp/smart_finish_sdb : ATTRIBUTE NEW_VAL OLD_VAL FAILURE_THRESHOLD STATUS RAW_VALUE : Raw_Read_Error_Rate = 111 100 6 ok 35617992 : Seek_Error_Rate = 73 100 30 ok 21054924 : Spin_Retry_Count = 100 100 97 near_thresh 0 : End-to-End_Error = 100 100 99 near_thresh 0 : Airflow_Temperature_Cel = 63 75 45 near_thresh 37 : Temperature_Celsius = 37 25 0 ok 37 : Hardware_ECC_Recovered = 111 100 0 ok 35617992 : 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. : ============================================================================ : ========================================================================1.15 : == invoked as: ./preclear_disk.sh /dev/sdc : == ST8000AS0002-1NA17Z Z8403xxx : == Disk /dev/sdc has been successfully precleared : == with a starting sector of 1 : == Ran 1 cycle : == : == Using :Read block size = 1000448 Bytes : == Last Cycle's Pre Read Time : 19:52:10 (111 MB/s) : == Last Cycle's Zeroing time : 16:32:45 (134 MB/s) : == Last Cycle's Post Read Time : 37:49:29 (58 MB/s) : == Last Cycle's Total Time : 74:15:27 : == : == Total Elapsed Time 74:15:27 : == : == Disk Start Temperature: 26C : == : == Current Disk Temperature: 38C, " : == : ============================================================================ : ** 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 = 112 100 6 ok 45860856 : Seek_Error_Rate = 73 100 30 ok 21308774 : Spin_Retry_Count = 100 100 97 near_thresh 0 : End-to-End_Error = 100 100 99 near_thresh 0 : Airflow_Temperature_Cel = 62 74 45 near_thresh 38 : Temperature_Celsius = 38 26 0 ok 38 : Hardware_ECC_Recovered = 112 100 0 ok 45860856 : 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. : ============================================================================ Those are fine. I "personally" would like to see the temps a "little" lower BUT they are well within manufacturers tolerances for those drives especially at high load. And 40'c is the break point for me so you are good imho. Furthermore, I would have run the disk through 3 cycles and a further long S.M.A.R.T test to gain a stronger degree of assurance that the disks are ok before trusting them with my data. That however is your risk to own - so your call. Quote Link to comment
Kir Posted June 30, 2015 Share Posted June 30, 2015 I only wonder why Pre Read was at much faster speed than Post Read? Quote Link to comment
garycase Posted June 30, 2015 Share Posted June 30, 2015 I only wonder why Pre Read was at much faster speed than Post Read? That's normal. There's a different version posted by bjp999 that does the post-read faster (in roughly the same time as the pre-read) ... but the longer post-read is normal for JoeL's script. Quote Link to comment
danioj Posted June 30, 2015 Share Posted June 30, 2015 I only wonder why Pre Read was at much faster speed than Post Read? It is normal for the last pass to be slower. Almost 1/2 speed of first pass is about right - unless you're using Brian's "Faster" preclear script. I believe the reason it is slower is that the last pass is a full read AND verify of the zeros written. Not sure if it's read is random too!? Quote Link to comment
danioj Posted June 30, 2015 Share Posted June 30, 2015 I only wonder why Pre Read was at much faster speed than Post Read? That's normal. There's a different version posted by bjp999 that does the post-read faster (in roughly the same time as the pre-read) ... but the longer post-read is normal for JoeL's script. Man you're fast!!! Quote Link to comment
pkn Posted July 1, 2015 Share Posted July 1, 2015 Not sure if it's read is random too!? AFAIK, it is. Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.