[CentOS] 4 X 500 gb drives - best software raid config for a backup server?

[John R Pierce]

Ray Van Dolson wrote:
> Can't Linux LVM do mirroring?  I swear I read that it could in the man
> page.  Never have tried it however and you certainly can't set it up
> from disk druid in anaconda.
>   


dunno.  the word 'mirror occurs exactly once in the man page for lvm(8)

        lvconvert -- Convert a logical volume from linear to mirror or 
snapshot.


the man page on lvconvert has more info, and this 
http://www.centos.org/docs/5/html/5.2/Cluster_Logical_Volume_Manager/mirrored_volumes.html  
certainly implies CentOS5 supports it.

glad to know thats finally there.  however, it doesn't seem to support 
little things like hot spares or automatic rebuilding.   in fact, the 
rebuild process looks involved and convoluted...   
http://www.centos.org/docs/5/html/5.2/Cluster_Logical_Volume_Manager/mirrorrecover.html