Re: [CentOS] mdraid on top of mdraid

On Mon, Mar 21, 2011 at 14:51, Emmanuel Noobadmin centos.admin@gmail.com wrote:

Is it possible or will there be any problems with using mdraid on top of mdraid?

specifically say mdraid 1/5 on top of mdraid multipath.

e.g. 4 storage machines exporting iSCSI targets via two different physical network switches

then use multipath to create md block devices

then use mdraid on these md block devices

The purpose being the raid storage array surviving a physical network switch failure.

Multipath should survive ONE switch failure and your storage should provide a fast raid implementation. You'll have really poor performance if you raid over iscsi...