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Requested and Answered by Johnny Hughes [hughesjr] on 06-Mar-2006 11:40 (49274 reads)
How do I install software RAID CentOS4?
There are 2 kinds of RAID, hardware RAID and software RAID.
The first thing that everyone needs to understand is that many of the new SATA RAID motherboards do not have real hardware RAID, but instead contain a software RAID. The hardware manufacturer provides a software driver to have Windows recognize this a RAID, however it is not hardware RAID, any more than winModems are full hardware modems.
So, in these instances, software RAID on Linux can be used.
Here is documentation on how to do software RAID on CentOS:
System Admin Guide, RAID
mdadm guide
(note: do not install mdadm from the tarball per the article, instead use the command: yum install mdadm, if required)
mdadm on FedoraNews
Man pages:
mdadm, mdadm.conf, md
After installation of a software RAID1, you must install grub on both partitions. Here is a way to do that:
Reference Guide, Grub Install
Grub on a mirrored boot partition
Hardware RAID is specific to each controller. There are hardware drivers and software to manage the arrays before installation. To CentOS, a hardware RAID configuration looks like one device to install on. All the RAID functions are handled by the hardware controller.
The first thing that everyone needs to understand is that many of the new SATA RAID motherboards do not have real hardware RAID, but instead contain a software RAID. The hardware manufacturer provides a software driver to have Windows recognize this a RAID, however it is not hardware RAID, any more than winModems are full hardware modems.
So, in these instances, software RAID on Linux can be used.
Here is documentation on how to do software RAID on CentOS:
System Admin Guide, RAID
mdadm guide
(note: do not install mdadm from the tarball per the article, instead use the command: yum install mdadm, if required)
mdadm on FedoraNews
Man pages:
mdadm, mdadm.conf, md
After installation of a software RAID1, you must install grub on both partitions. Here is a way to do that:
Reference Guide, Grub Install
Grub on a mirrored boot partition
Hardware RAID is specific to each controller. There are hardware drivers and software to manage the arrays before installation. To CentOS, a hardware RAID configuration looks like one device to install on. All the RAID functions are handled by the hardware controller.
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