[CentOS] How to make software raid on Centos 4

Thu Apr 7 11:22:49 UTC 2005
Bank <kultawat at 126.com>

I use dmraid as you see in.
http://www.net-forums.net/forums/Mounting_Ntfs_Partions_On_Raid_0_Device-t19
791.html


my mainboard is MSI RS480 M2
http://www.msi.com.tw/program/products/mainboard/mbd/pro_mbd_detail.php?UID=
639
CPU AMD 64 3000+
HDD Segate 20G IDE
          Maxtor 160G SATA x 2

My mainboard have silicon image SATA Raid controller building.
Then I compile kernel 2.6.11 and enable data-mapper module.

And I create Maxtor 160G x 2 to raid 0 .
[root at ares ~]# dmraid  -s
*** Active Set
name   : sil_afaeafbgccbgb
size   : 640339968
stride : 64
type   : striped
status : ok
subsets: 0
devs   : 2
spares : 0
[root at ares ~]# sfdisk --show-size /dev/mapper/sil_afaeafbgccbgb
320169984
[root at ares ~]# sfdisk --show-size /dev/mapper/sil_afaeafbgccbgb1
320167386

Every thing seem to be OK, but when I mount  /dev/mapper/sil_afaeafbgccbgb1
and use command df.

[root at ares ~]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hda3             36384656   2596712  31939668   8% /
/dev/hda1               101105     46194     49690  49% /boot
none                    504892         0    504892   0% /dev/shm
/dev/mapper/sil_afaeafbgccbgb1
                     160074724  17954072 142120652  12%
/home/topwarez.com/torrent/httpd/users

Why the system show a half size (160074724 ) of my raid array.





-----Original Message-----
From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf
Of Johnny Hughes
Sent: Thursday, April 07, 2005 5:41 PM
To: CentOS ML
Subject: Re: [CentOS] How to make software raid on Centos 4

On Thu, 2005-04-07 at 17:33 +0700, Bank wrote:
> My mainboard have SATA Raid function (sata_sil).
> 
> I want to create software raid on Centos 4, but I can't see mkraid
packeage.
> How would I create software raid 0 on centos 4.
> 

use the program:

mdadm

see "man mdadm" for details :)