I am trying to do a preclear and I keep getting an error saying Sorry: Device /dev/xxx is busy.: 1  I am using 6.2.4 and read in another thread a person was using 6.2 beta 18 and the included sfdisk command does not support the R option.  They recommend doing the preclearing back in v6.1.9.  Is that the case here with 6.2.4 and if so what is the most recent version of Unraind that you can run preclear with?  That tread was from March so I wasn't sure if there were newer versions that worked since then with preclear.

 

 

root@Tower:~# cd /boot
root@Tower:/boot# preclear_disk.sh -l
====================================1.15
Disks not assigned to the unRAID array
  (potential candidates for clearing)
========================================
     /dev/sdb = ata-TOSHIBA_HDWE150_Y666KF59F57D
root@Tower:/boot# preclear_disk.sh /dev/sdb
./preclear_disk.sh: line 1307: /root/mdcmd: No such file or directory
sfdisk: invalid option -- 'R'

Usage:
sfdisk [options] <dev> [[-N] <part>]
sfdisk [options] <command>

Display or manipulate a disk partition table.

Commands:
-A, --activate <dev> [<part> ...] list or set bootable MBR partitions
-d, --dump <dev>                  dump partition table (usable for later input)
-J, --json <dev>                  dump partition table in JSON format
-g, --show-geometry [<dev> ...]   list geometry of all or specified devices
-l, --list [<dev> ...]            list partitions of each device
-F, --list-free [<dev> ...]       list unpartitions free areas of each device
-s, --show-size [<dev> ...]       list sizes of all or specified devices
-T, --list-types                  print the recognized types (see -X)
-V, --verify [<dev> ...]          test whether partitions seem correct

--part-label <dev> <part> [<str>] print or change partition label
--part-type <dev> <part> [<type>] print or change partition type
--part-uuid <dev> <part> [<uuid>] print or change partition uuid
--part-attrs <dev> <part> [<str>] print or change partition attributes

<dev>                     device (usually disk) path
<part>                    partition number
<type>                    partition type, GUID for GPT, hex for MBR

Options:
-a, --append              append partitions to existing partition table
-b, --backup              backup partition table sectors (see -O)
     --bytes               print SIZE in bytes rather than in human readable for
mat
-f, --force               disable all consistency checking
     --color[=<when>]      colorize output (auto, always or never)
                             colors are enabled by default
-N, --partno <num>        specify partition number
-n, --no-act              do everything except write to device
     --no-reread           do not check whether the device is in use
-O, --backup-file <path>  override default backup file name
-o, --output <list>       output columns
-q, --quiet               suppress extra info messages
-X, --label <name>        specify label type (dos, gpt, ...)
-Y, --label-nested <name> specify nested label type (dos, bsd)

-L, --Linux               deprecated, only for backward compatibility
-u, --unit S              deprecated, only sector unit is supported

-h, --help     display this help and exit
-v, --version  output version information and exit

Available columns (for -o):
gpt: Device Start End Sectors Size Type Type-UUID Attrs Name UUID
dos: Device Start End Sectors Cylinders Size Type Id Attrs Boot End-C/H/S
      Start-C/H/S
bsd: Slice Start End Sectors Cylinders Size Type Bsize Cpg Fsize
sgi: Device Start End Sectors Cylinders Size Type Id Attrs
sun: Device Start End Sectors Cylinders Size Type Id Flags

For more details see sfdisk(.
Sorry: Device /dev/sdb is busy.: 1
root@Tower:/boot#

Revered back to 6.1.9 and now it's working.

Preclear script needs to be patched to work with v6.2, search the forum or use the plug-in.

In fact, if you had searched you would find someone else asked your exact question only 2 day ago.

 

See search tips in my sig.

Preclear script needs to be patched to work with v6.2, search the forum or use the plug-in.

Thanks for the info.  I already started the preclear last night however once it's done I add the patch and upgrade to 6.2.4 again in case I have to do it in the future.

 

 

In fact, if you had searched you would find someone else asked your exact question only 2 day ago.

 

See search tips in my sig.

 

I did search before posting.  How do you think I came across the thread where the person had the same issue and was using 6.2 beta 18.  Sorry I didn't come across the post you mentioned from two days ago.  I'm not on this form a lot and every form's search behavior is different.  Even the forms I do spend a lot of times on I can still have issues searching for posts I made and the one thing I learned is the more you use them the better you get.  But like any other forum instead of you posting a link to that specific thread from two days ago to help me out your quick to make assumptions and say "if I would have searched" like I didn't try doing that in the first place.

I did search before posting.  How do you think I came across the thread where the person had the same issue and was using 6.2 beta 18.  Sorry I didn't come across the post you mentioned from two days ago.  I'm not on this form a lot and every form's search behavior is different.  Even the forms I do spend a lot of times on I can still have issues searching for posts I made and the one thing I learned is the more you use them the better you get.  But like any other forum instead of you posting a link to that specific thread from two days ago to help me out your quick to make assumptions and say "if I would have searched" like I didn't try doing that in the first place.

I was just trying to help you help yourself in the future. Many people have trouble figuring out how to use the search feature on this forum (no, it's not obvious), which is why I suggested you read the linked sticky in my sig.

For anyone else searching this that has found disks always say 'busy' when trying to preclear from the command line on latest versions of unRAID, just found the following plugin you can install to do it via the GUI instead:

 

 

Ok so using the plugin, I get to 93% read, and it hangs for hours and hours.  (Ok only did it once but not going to waste my time again)

 

The preclear script I have installed gives me a "device is buys".

 

It's a WD 8TB Easystore...  Can someone give a nudge?

1 minute ago, JackBauer said:

The preclear script I have installed gives me a "device is buys".

 

https://forums.lime-technology.com/topic/12391-re-preclear_disksh-a-new-utility-to-burn-in-and-pre-clear-disks-for-quick-add/?do=findComment&comment=460592

Thanks Johnnie!  That did it...