Step 2 remains the same. Logical volumes are prepared for the new disks in the same way.

In step 3, switch the volume group back to shared mode, using SNOR, and export the VG across the cluster, ensuring that the right ownership and access rights are assigned to the raw logical volumes. Activate the volume group, and restart ASM and the database(s) using ASM-managed storage on all nodes (they are already active on node A).

SG/SGeRAC Support for ASM on HP-UX 11i v3

Overview

Support for ASM with SG/SGeRAC commences with SGeRAC A.11.17.01 on HP-UX 11i v3. SGeRAC support ASM where the member disk groups are either logical volumes managed by HP Shared Logical Volume Manager (SLVM) or raw disks/disk array logical units(LUs).

A new I/O infrastructure that enables the native built-in multipathing functionality is introduced in HPUX 11i v3. This feature offers users a continuous I/O access to a LUN or disk if any of the paths fails. This feature is enabled in the operating system by default. In addition, new DSF(device special file) format is introduced in this operating system. An example of new DSF is /dev/disk/disk1, compare to the legacy DSF, /dev/rdsk/cxtydz.

Please note that it has been possible to set up Oracle databases using ASM on HP-UX from the time Oracle 10g became available on HP-UX, using the following configurations that do not require SG/SGeRAC:

•Non-clustered single instance Oracle.

•Oracle single instance and RAC databases running in a pure Oracle clusterware environment. The following requirements/restrictions apply to SG/SGeRAC (A.11.17.01 or later) support

of ASM (summarized in Table 4):

Table 4 ASM support with SG/SGeRAC A.11.17.01 or later

Supported

Not Supported

 

 

Oracle RAC database

Oracle single instance database, with or without Oracle

 

clusterware

 

 

SLVM Logical Volumes as ASM Disk Group Members

CVM Logical Volumes as ASM Disk Group Members

 

 

ASM configurations on SGeRAC using SGeRAC

Single instance Oracle database with ASM managed

A.11.17.01 or later, and Oracle 10g R2 RAC

storage running in Serviceguard cluster

 

 

ASM configurations on SGeRAC using SGeRAC

Single instance Oracle database with ASM-managed

A.11.17.01 or later, and 11g R1 RAC

storage in SGeRAC configuration wherein SGeRAC

 

provides node membership to Oracle Clusterware

 

 

Maximum SGeRAC cluster size for ASM configurations is

 

16

 

 

 

SGeRAC Toolkit3 framework based on Multi-Node Package

 

(MNP) /Simple Package Dependency to manage ASM

 

configurations on SGeRAC up to a maximum cluster size

 

of 16

 

 

 

Raw disks/disk array LUs as ASM Disk Group Members

 

 

 

ASM over SLVM

SGeRAC support for ASM-over-SLVM continues in HPUX 11i v3. SGeRAC 11.17.01 or later is required for ASM-over-SLVM configurations on HP-UX 11i v3.

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