Infortrend RAID Controller Manual

9.5 RAID-Based Mapping
Sync. cache controller-controller communications
Over dedicated or all drive loops (user-configurable)
RAID-based mapping provides access control over a Storage Area
Network where:
1. Servers share common storage;
2. File integrity becomes an issue and access contentions might
occur;
3. File access must be coordinated among multiple servers.
Figure 9 - 4 Storage Pool
Host A
Host B
Host C
Host D
Host E
SAN
RAID Storage
Storage Pool
Fibre Operation 9-15
LUN0
LUN1
LUN2
LUN3
LUN4
LUN5
RAID-based mapping provides the centralized management for hoststorage
access. It is derived from the concept that storage can be
divided into manageable pieces by mapping storage to different
Logical Unit Numbers (LUNs). The storage can then be managed in
the context of a LUN map. We then append filtering mask(s) to the
LUNs making specific storage unit accessible or inaccessible to one or
multiple host adapters.