Disk Array Configurations Supported for Use with DMP

For the most up-to-date Hardware Compatibility List detailing supported Array Support Libraries (ASLs), visit the VERITAS support site at http://support.veritas.com, select Volume Manager > Volume Manager for UNIX, click on Compatibility, and enter the product version and platform details.

Arrays supported by the Dynamic Multipathing (DMP) feature are a subset of the arrays supported by VxVM. The following arrays can have multiple paths to the same disk. Arrays that are not listed in this document or on the VERITAS Support website may only be supported for single path access.

Arrays supported in Active/Active (A/A) mode

• JBOD (Just a Bunch of Disks); see JBOD Disk Array Support in DMP
• Cisco MDS 9000
• EMC Symmetrix 5.0, 5.5 and 6.0; see EMC Symmetrix Disk Arrays
• Hitachi Data Systems 9970 and 9980 Disk Array Subsystem
• Hitachi TagmaStore USP
• HP Surestore Disk System FC10; see HP Surestore Disk System FC10
• HP StorageWorks Disk System DS2405
• HP Surestore Virtual Array 7100, 7110, 7400 and 7400
• HP Surestore Disk Array XP48, XP128, XP256 and XP1024; see HP Surestore Disk Array XP48, XP256 and XP512

Arrays supported in Active/Passive (A/P) mode

• EMC Clariion CX400 and CX600; see DMP Coexistence with EMC PowerPath
• Hitachi Data Systems 9500 Disk Array Subsystem
• HP High Availability Fibre Channel Disk Array Model 30/FC
• HP Surestore Disk Array FC60; see HP Surestore Disk Array FC60
• IBM FAStT 500, 600, 700 and 900
• STK FlexLine FLX280

SeeAdministering Array Support Library Packages for details of how to add, remove or upgrade ASL packages.

JBOD Disk Array Support in DMP

DMP supports multipathing of JBOD disk arrays that are connected to a system running VxVM. These JBOD disk arrays can contain disks from any vendor. However, DMP can correctly detect multiple paths to the disks in these disk arrays only if the following conditions are satisfied:

• The serial number field of the Standard SCSI INQUIRY DATA (bytes 36---47) should be "world wide unique" for any disk that is connected to a JBOD. This fact must be known to the user before the user attempts to configure DMP to add these disks to the JBOD category of DMP.

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 Caution    If any disk does note provide a unique serial number, DMP cannot detect multiple paths to the disk correctly and results are unpredictable. Contact the JBOD disk or disk array vendor to obtain correct information about unique serial numbers on disks.

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• The JBOD disk arrays that require multipathing functionality from DMP should be of the Active/Active type. This means that all paths to all LUNs on the JBOD disk array should be simultaneously accessible through all paths, without causing any performance degradation.