Hi togehter, I have new 4TB disk and tried to preclear it in two different servers. I alwas get the following message at the end:
= unRAID server Pre-Clear disk /dev/sdg
= cycle 1 of 1, partition start on sector 1
= Disk Pre-Clear-Read completed DONE
= Step 1 of 10 - Copying zeros to first 2048k bytes DONE
= Step 2 of 10 - Copying zeros to remainder of disk to clear it DONE
= Step 3 of 10 - Disk is now cleared from MBR onward. DONE
= Step 4 of 10 - Clearing MBR bytes for partition 2,3 & 4 DONE
= Step 5 of 10 - Clearing MBR code area DONE
= Step 6 of 10 - Setting MBR signature bytes DONE
= Step 7 of 10 - Setting partition 1 to precleared state DONE
= Step 8 of 10 - Notifying kernel we changed the partitioning DONE
= Step 9 of 10 - Creating the /dev/disk/by* entries DONE
= Step 10 of 10 - Verifying if the MBR is cleared. DONE
=
Elapsed Time: 11:48:47
========================================================================1.15
==
== SORRY: Disk /dev/sdg MBR could NOT be precleared
==
== out4= 00000
== out5= 00000
============================================================================
0+0 records in
0+0 records out
0 bytes (0 B) copied, 7.1247e-05 s, 0.0 kB/s
0000000
After that I have to reboot that preclear recognizes that drive again and if i run a preclear_disk.sh -t /dev/sdg it says:
################################################################## 1.15
Device Model: WDC WD40EFRX-68WT0N0
Serial Number: WD-WCC4E1714880
LU WWN Device Id: 5 0014ee 2b4d4275f
Firmware Version: 80.00A80
User Capacity: 4,000,787,030,016 bytes [4.00 TB]
Disk /dev/sdg: 4000.8 GB, 4000787030016 bytes
255 heads, 63 sectors/track, 486401 cylinders, total 7814037168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xf3034ac4
Device Boot Start End Blocks Id System
########################################################################
failed test 1
failed test 2 00000 00000 00000 00000
failed test 3 00000 00000 00000 00000
failed test 5
failed test 6
========================================================================1.15
==
== Disk /dev/sdg is NOT precleared
== 0 0 4294967295
============================================================================