From mboxrd@z Thu Jan  1 00:00:00 1970
From: Neil Brown <neilb@suse.de>
Subject: Re: RAID0 size bug (?)
Date: Sat, 9 Oct 2010 10:45:16 +1100
Message-ID: <20101009104516.129c60e2@notabene>
References: <0a7401cb673c$12820280$0400a8c0@dcccs>
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Sender: linux-raid-owner@vger.kernel.org
To: Janos Haar <janos.haar@netcenter.hu>
Cc: linux-raid@vger.kernel.org
List-Id: linux-raid.ids

On Sat, 9 Oct 2010 00:56:38 +0200
"Janos Haar" <janos.haar@netcenter.hu> wrote:

> Hello list,
> 
> Maybe a known old bug, but i don't know.
> 
> The size is wrong of the md8:
> 
> [root@UNISTORE ~]# fdisk -l /dev/sdh
> 
> Disk /dev/sdh: 750.1 GB, 750156374016 bytes
                 ^^^^^^^^^
> 255 heads, 63 sectors/track, 91201 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes

So 750GB

> 
> Disk /dev/sdh doesn't contain a valid partition table
> [root@UNISTORE ~]# fdisk -l /dev/sdf
> 
> Disk /dev/sdf: 500.1 GB, 500107862016 bytes
                 ^^^^^^^^^
> 255 heads, 63 sectors/track, 60801 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes

This one is 500GB


> 
> Disk /dev/sdf doesn't contain a valid partition table
> [root@UNISTORE ~]# mdadm --detail /dev/md8
> /dev/md8:
>         Version : 00.90.03
>   Creation Time : Sat Oct  9 06:36:36 2010
>      Raid Level : raid0
>      Array Size : 1220961088 (1164.40 GiB 1250.26 GB)
                                            ^^^^^^^^^^^

750GB + 500GB == 1250 GB

So what is your problem?

NeilBrown


>    Raid Devices : 2
>   Total Devices : 2
> Preferred Minor : 8
>     Persistence : Superblock is not persistent
> 
>     Update Time : Sat Oct  9 06:36:36 2010
>           State : clean
>  Active Devices : 2
> Working Devices : 2
>  Failed Devices : 0
>   Spare Devices : 0
> 
>      Chunk Size : 64K
> 
>     Number   Major   Minor   RaidDevice State
>        0       8      112        0      active sync   /dev/sdh
>        1       8       80        1      active sync   /dev/sdf
> [root@UNISTORE ~]#
> [root@UNISTORE ~]# uname -a
> Linux UNISTORE 2.6.28.10 #5 SMP Fri Jan 29 07:40:35 CET 2010 x86_64 x86_64 
> x86_64 GNU/Linux
> [root@UNISTORE ~]# mdadm -V
> mdadm - v2.5.4 - 13 October 2006
> [root@UNISTORE ~]#
> 
> 
> Cheers,
> Janos 
> 
> --
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