[Gllug] Hardware RAID On-Disc Format

[John Hearns]

On Mon, 15 Mar 2004, Richard Cottrill wrote:

> John Hearns wrote:
> 
> > I was able to do it - pulled one of the hard disks, put the hardware RAID 
> > card in, and was able to duplicate the disk as part of a hardware mirror 
> > set.  Did this twice as it parrt of a Linux-HA failover pair.
> > Reinstall of GRUB and I was away.
> 
> Just to clarify, this was just a simple mirrored disk? There was no 
> sriping, or other tricks involved? In my mind, this would have been 

This was a simple mirrored disk.
The customer wanted redundancy - so we put in mirrored SCSI disks for
the OS on the master node of the cluster. Each server has two PSUs.
The master node is replicated to an identical failover node, and is 
connected in a high availability cluster.

The two servers share a 2Tbyte SCSI disk array, which is configured as a 
RAID5 + spare. NFS failover is configured, as well as other services 
including Sun Gridengine, so that the cluster can failover to the other 
node.
Oh, and two separate gigabit fibre links, again I've arranged the IP 
address to fail over.


Sorry if I'm buffing my nails here a little :-)


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