On Monday, December 12, 2011 02:02:41 PM John R Pierce wrote: > On 12/12/11 10:23 AM, Digimer wrote: > > Shared cache is, I think, a single-point-of-failure. > > no, its done with replication over a private channel between the storage > controllers. standard feature on all redundant controller > hardware/appliance storage controllers such as IBM DS series, HP MSA, > etc etc. EMC Clariion CX/CX3/CX4 and VNX, also.