[CentOS] How to make software raid on Centos 4

[William Warren]

Raid0?  I am assuming you are going for the speed benefits(which 
are neglible at worst and not 2x the speed at best) instead of 
data security?

Bank wrote:

> 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 :)
> 
> 
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> 

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