All,
I have a 4tb drive I've pre-cleared:
root@Tower:/tmp# cat preclear_report_sdc
========================================================================1.14
== invoked as: ./preclear_disk.sh -A -c 3 /dev/sdc
== ST4000DM000-1F2168 Z302AB81
== Disk /dev/sdc has been successfully precleared
== with a starting sector of 64
== Ran 3 cycles
==
== Using :Read block size = 8388608 Bytes
== Last Cycle's Pre Read Time : 15:01:10 (33 MB/s)
== Last Cycle's Zeroing time : 17:03:33 (29 MB/s)
== Last Cycle's Post Read Time : 31:09:54 (16 MB/s)
== Last Cycle's Total Time : 48:14:27
==
== Total Elapsed Time 159:44:48
==
== Disk Start Temperature: 29C
==
== Current Disk Temperature: 35C,
==
============================================================================
** 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 = 117 114 6 ok 160005424
Spin_Retry_Count = 100 100 97 near_thresh 0
End-to-End_Error = 100 100 99 near_thresh 0
Airflow_Temperature_Cel = 65 71 45 near_thresh 35
Temperature_Celsius = 35 29 0 ok 35
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 3.
0 sectors were pending re-allocation after zero of disk in cycle 1 of 3.
0 sectors were pending re-allocation after post-read in cycle 1 of 3.
0 sectors were pending re-allocation after zero of disk in cycle 2 of 3.
0 sectors were pending re-allocation after post-read in cycle 2 of 3.
0 sectors were pending re-allocation after zero of disk in cycle 3 of 3.
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.
============================================================================
No errors were recored during pre-clear. However, when I plug it into my array, it only gives the option to clear it and not just add it. I tried the preclear_disk.sh -t:
Pre-Clear unRAID Disk /dev/sdc
################################################################## 1.14
Model Family: Seagate Desktop HDD.15
Device Model: ST4000DM000-1F2168
Serial Number: Z302AB81
LU WWN Device Id: 5 000c50 0793c3954
Firmware Version: CC54
User Capacity: 4,000,787,030,016 bytes [4.00 TB]
Disk /dev/sdc: 1801.8 GB, 1801763774464 bytes
255 heads, 63 sectors/track, 219051 cylinders, total 3519069872 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdc1 64 3519069871 1759534904 0 Empty
Partition 1 does not end on cylinder boundary.
########################################################################
========================================================================1.14
==
== DISK /dev/sdc IS PRECLEARED with a starting sector of 64
==
============================================================================
The thing that stands out to me though is that it reads the disk as Disk /dev/sdc: 1801.8 GB. Is that normal? Do I have to do anything special for large (2tb+) drives?
thanks,
Dan H.