HP StorageWorks 4000/6000/8000 - Enterprise Virtual Arrays Reference Manual page 202

Rule
nl
number Description
15 High-availability SAN
Requires dual-redundant SAN fabrics (level 4, NSPOF high-availability SAN configuration;
see "Data availability" on page 53 for information about data availability levels). Each fabric
consists of either a single switch or two cascaded switches, as shown in Figure 58 through
Figure 65.
A single fabric supports a maximum of three switches.
Requires separate fabric zones. Each zone consists of the set of NonStop host (FCSA, Fibre
Channel PIC, or CLIM) WWNs and XP storage system port WWNs to be accessed from a
single NonStop system.
Configure WWN-based zoning only.
Only NonStop homogeneous connections are allowed to the same zone.
Heterogeneous operating systems can share the same switch or SAN, if they are in different
zones.
HP recommends host-based mirroring. For example, each LDEV (P) is mirrored to a separate
LDEV (M) on separate XP ports (p, b, m, mb paths are used). A nonmirrored volume is allowed.
For example, each LDEV (P) is not mirrored to a separate LDEV (M) on separate XP ports (only
p and b paths are used).
For high availability, primary (P) LDEVs and mirror (M) LDEVs must be configured on separate
array ACP pairs.
For high availability, the p and b paths must be in separate XP array clusters. The m and mb
paths must be in separate array clusters.
HP recommends that the p and mb paths be in the same XP array cluster, and the b and m
paths be together in the other XP array cluster for a volume.
FCSAs (IOAMEs), Fibre Channel PICs (VIOs), FC HBAs (CLIMs), C-series switches, and B-series
switches are supported with 1 Gb/2 Gb CHIPs for the
XP128/1024/10000/12000/20000/24000 and with 4 Gb CHIPs for the
XP10000/12000/20000/24000.
202 Heterogeneous server rules