Re: Hints on reducing kickouts

[Bryan Mesich <bryan.mesich@xxxxxxxx>]

On Sat, Mar 03, 2012 at 10:28:20PM +0100, John Obaterspok wrote:
> Please see below for errors I get when trying to add internal bitmap.

[snip...]
 
> okay, I'm trying to add an interal bitmap to see how much it slows down things:
> 
> [root@Emperor ~]# mdadm --version
> mdadm - v3.2.3 - 23rd December 2011
> 
> 
> [root@Emperor ~]# mdadm --grow --bitmap=internal /dev/md2
> mdadm: failed to set internal bitmap.

I think you are using the wrong cmd line syntax.  Try the
following for adding an internal bitmap to /dev/md2

mdadm --grow /dev/md2 --bitmap=internal

If you want to use an external bitmap, use --bitmap="path to
file".

> [root@Emperor ~]# mdadm --examine-bitmap /dev/md2
>         Filename : /dev/md2
>            Magic : 00000000
> mdadm: invalid bitmap magic 0x0, the bitmap file appears to be corrupted
>          Version : 0
> mdadm: unknown bitmap version 0, either the bitmap file is corrupted
> or you need to upgrade your tools
> 

[snip...]

Bryan
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