HP StorageWorks Data Replication Manager for Sun Solaris 7 and 8 with VERITAS Volume Manager 3.X Application Notes (AA-RQ6AD-TE, March 2004)

DRM Configuration Variations
5Data Replication Manager for Sun Solaris 7 and 8 with VERITAS Volume Manager 3.xApplication Notes
About VERITAS Volume Manager
VERITAS Volume Manager is an online storage management tool for enterprise computing
and SAN environments. It allows online administration from a single management console
across multiple hosts and disk storage configurations.
Through the support of RAID redundancy techniques, VERITAS Volume Manager protects
against disk and hardware failures and lets users extend the capabilities of existing hardware.
VERITAS Volume Manager provides a logical volume management layer, spanning volumes
across multiple spindles, overcoming the physical restriction imposed by hardware disk
devices.
DRM Configuration Variations
Keep the following points in mind when installing VERITAS Volume Manager.
Installing VERITAS Volume Manager First
Installing VERITAS Volume Manager can greatly impact your existing file systems. Use care
when performing this installation.
Caution: HP recommends that you install VERITAS Volume Manager before you make
major configuration changes or install other software, such as the HSG80 platform kit for
Sun Solaris, or Secure Path for Sun Solaris. If an error occurs during VERITAS Volume
Manager installation, then all existing file systems may be lost.
Grouping Internal and External Storage in Disk Groups
To simplify your DRM configuration, HP recommends that you group internal storage only
with internal storage, and group external storage only with external storage. If you create a
disk group with storage that is internal to the host, and group it with storage in an external
HSG80 subsystem, you will not be able to deport and import the disk group between the
initiator and target sites.
Disabling Dynamic Multipathing
VERITAS Volume Manager Dynamic Multipathing (DMP) must be disabled to avoid
interference with Secure Path for Sun Solaris. Disabled is the default setting. If you have
enabled DMP, follow the instructions in the VERITAS Volume Manager 3.1 Administrator's
Guide—Solaris document to disable DMP.