[Preclear.sh results - Questions about your results? Post them here.]

You didn't answer the question about what unRAID version. The current version of preclear is 1.15. Version 1.15 fixed a problem with running preclear on 64bit unRAID.

 

Sorry, my version of unRaid is 5.0.5.

 

You guys hit the nail on the head. I attached the disk to my unraid server and pre_clear.sh -t shows the full disk size, but also that the drive is not precleared. I'm running it now on that server.

 

thanks all.

[Preclear.sh results - Questions about your results? Post them here.]

trurl,

 

Ahh, you're probably right about the system not recognizing the drive size. I run the preclear on an old Del XPS laptop.

 

The version of the preclear is 1.14.

 

I'll see if I can get the xps to recognize 2tb+. My actual unraid system does recognize 4tb, as my parity drive is 4tb. If I run the preclear and laptop does not see all 4tb, would that bew why unraid does not see the clear signature on the drive?

 

thanks.

[Preclear.sh results - Questions about your results? Post them here.]

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.