VERITAS Volume Manager 3.2 for HP-UX Release Notes

Compatibility Information and Installation Requirements

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— 5265 or 5266 for Sym-4.8 on models 3630, 3830, and 3930

— 5566 for Sym-5 on models 8130, 8430, and 8730

• The Common Serial Number Mode should be enabled for all channels that participate in

the DMP. This is done at installation time in the Symmetrix configuration by the EMC

Customer Engineer.

• Ultra SCSI and fast-wide differential (FWD) SCSI support has been tested on the EMC

OSD (Open System Director) controller.

See your sales representative for further updates on hardware support.

DMP and EMC PowerPath Exclusive Use Support

NOTE VxVM is not supported with versions of EMC PowerPath earlier than 2.1.

If you use EMC’s PowerPath 2.1 with EMC Symmetrix disk arrays, EMC PowerPath

intercepts the I/O from VERITAS Dynamic Multipathing (DMP) just before it reaches the

SCSI subsystem, and manages it from that point through the SCSI subsystem to the EMC

disk array(s).

In this release, it is not possible to have DMP exclusively manage some LUNs and EMC

PowerPath exclusively manage others on the same EMC Symmetrix disk array(s).

DMP and EMC PowerPath can coexist. Therefore, there is no need to disable either DMP or

EMC PowerPath when VERITAS Volume Manager 3.2 for HP-UX is installed on the same

host as EMC PowerPath.

DMP and HP FC10 Disk System Support

Because of the way LUNs are distributed across controllers by HP-UX, the enable/disable

controller feature of VxVM does not function as expected for the following configurations of

FC10 disk systems:

• multiple daisy chained FC10 disk systems connected to a single host

• multiple FC10 disk systems connected to a single host through a hub

If the vxdmpadm disable ctlr=ctlr_name command is used for the above configurations to

disable IOs through a particular controller, IOs can be stopped through paths that were not

intended by the user.

If each FC10 disk system is individually connected to the host (using separate HBAs), the

above mentioned feature functions correctly and as expected.