HP Windows Server 2012 Cluster Pre-Planning Guide

The Number of LUNs Managed by the Cluster
Microsoft Failover Clustering sends a single reservation per LUN. Due to this behavior, the maximum
number of LUNs managed by the cluster is directly related to the number of reservations supported
per port or array. The following equation can be used to calculate the number of reservations per
LUN or port:
Table 3 SCSI-3 Reservation Capabilities per Storage Array
SCSI-3 ReservationsHP Storage
512HP P2000 G3 MSA Array Systems
512HP MSA2000 G2
512HP MSA 2040 Storage
FC: 2047HP EVA P6000 Storage
iSCSI: 4096
iSCSI/FCoE: 4096
2047HP EVA 4400/6400/8400
2048 per CHA portHP XP P9000 Storage
(70-04-52-00/00 or greater)
128 per CHA portHP XP 20000/XP24000
8192HP 3PAR StoreServ 7000
12288HP 3PAR StoreServ 10000
8192HP 3PAR T-Class Storage Systems
HP 3PAR OS 3.1.1 MU2 or later
Cluster Resource Pending Timeout
When implementing a large failover cluster, it may be necessary to increase the pending timeout
value within the cluster disk properties. This allows the cluster resource more time to failover to
other cluster nodes. See Microsoft documentation for more details.
10 Considerations when Planning Failover Clusters