Veritas Dynamic Multi-Pathing for Windows (DMPW) adds additional fault tolerance to disk storage by making use of multiple paths between a server/host computer and a disk in a storage array. A path is a connection between the server/host computer and the storage array’s disks and consists of a host adapter and a SCSI bus connection to one or more SCSI disks or a fiber optic channel connected to a hub, switch, or array. Thus, multiple paths are made possible by connecting two or more host bus adapters with either SCSI or fiber optic cabling to the storage array. DMPW manages the multiple paths so that the data on each of the array’s disks is accessible to the host computer. If a path to a disk fails, Dynamic Multi-Pathing automatically transmits data to and from the disk over an alternate path.
The paths on an array are set up to work in two ways—either in Active/Active mode, which provides load balancing of the data between multiple paths, or in Active/Passive mode, in which only one path is active and any remaining paths are backups.
DMPW is implemented through Veritas Dynamic Multi-Pathing for Windows Device Specific Modules (DMPW DSMs). DMP DSMs are designed to support a multipath disk storage environment set up with the Microsoft Multipath I/O (MPIO) solution. DMP DSMs work effectively with Windows to provide a fault tolerant multipath disk storage environment.
• Windows Server 2003 SP2 (x86): Web Edition
• Windows Server 2003 SP2 (x86, x64, IA64): Standard, Enterprise, Datacenter Editions
• Windows Server 2003 R2 SP2 (x86, x64): Standard, Enterprise, Datacenter Editions
• Windows Server 2008 SP1 or SP2 (x86, x64): Web, Standard, Enterprise, Datacenter Editions
• Windows Server 2008 for Itanium-based Systems SP1 or SP2 (IA64)
• Windows Server 2008 R2 (x64): Web, Standard, Enterprise, Datacenter Editions
• Windows Server 2008 R2 for Itanium-based Systems (IA64)
• Windows 7 (x86, x64): support with client components
• Windows Vista SP1 or SP2 (x86, x64): Ultimate, Enterprise, Business Editions (support with client components)
• Windows XP SP2 or SP3 (x86, x64): (support with client components)
See release notes starting on page 10
Hardware Compatibility List:
Link to Installation and Configuration Guide(s):