## 6.10.2 Symantec Veritas Volume Manager 

When you are managing IBM Spectrum Virtualize storage in Symantec volume manager products, you must install an ASL on the host so that the volume manager is aware of the storage subsystem properties (active/active or active/passive). If the appropriate Array Support Library (ASL) is not installed, the volume manager did not claim the LUNs. Usage of the ASL is required to enable the special failover or failback multipathing that IBM Spectrum Virtualize requires for error recovery. 

Use the commands that are shown in Example 6-8 to determine the basic configuration of a Symantec Veritas server. 

pkginfo –l (lists all installed packages) showrev -p |grep vxvm (to obtain version of volume manager) vxddladm listsupport (to see which ASLs are configured) vxdisk list vxdmpadm listctrl all (shows all attached subsystems, and provides a type where possible) vxdmpadm getsubpaths ctlr=cX (lists paths by controller) vxdmpadm getsubpaths dmpnodename=cxtxdxs2’ (lists paths by LUN) 

The commands that are shown in Example 6-9 and Example 6-10 determine whether the IBM Spectrum Virtualize is properly connected. They show at a glance which ASL is used (native DMP ASL or SDD ASL). Example 6-9 shows what you see when Symantec Volume Manager correctly accesses IBM Spectrum Virtualize by using the SDD pass-through mode ASL. 

# vxdmpadm list enclosure all ENCLR_NAME ENCLR_TYPE ENCLR_SNO STATUS ============================================================ OTHER_DISKS OTHER_DISKS OTHER_DISKS CONNECTED VPATH_SANVC0 VPATH_SANVC 0200628002faXX00 CONNECTED 

Example 6-10 shows what you see when IBM Spectrum Virtualize is configured by using native DMP ASL. 

## 6.10.3 DMP multipathing 

# vxdmpadm listenclosure all ENCLR_NAME ENCLR_TYPE ENCLR_SNO STATUS ============================================================ OTHER_DISKS OTHER_DSKSI OTHER_DISKS CONNECTED SAN_VC0 SAN_VC 0200628002faXX00 CONNECTED 

For the latest ASL levels to use native DMP, see the array-specific module table at this website: 

https://sort.symantec.com/asl 

For the latest Veritas Patch levels, see the patch table at this website: 

https://sort.symantec.com/patch/matrix 

