On Mon, Mar 21, 2011 at 14:51, Emmanuel Noobadmin <centos.admin at 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... -- Marcelo "¿No será acaso que ésta vida moderna está teniendo más de moderna que de vida?" (Mafalda)