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VxVM Disk Array Configuration Updates

26 VERITAS Volume Manager Hardware Notes

You can extract a list of supported hardware including arrays from the VERITAS

customer support web site at: http://support.veritas.com

For the Hitachi DF array families (DF350, DF400, DF500), only A/P mode will be

supported. If you have any of the Hitachi DF arrays installed, you must ensure that the

arrays are configured as A/P mode.

Contact Veritas support for assistance in determining your Hitachi array mode.

Contact your Hitachi Data Systems Technical Support Representative for assistance in

reconfiguring the DP arrays to A/P mode.

DMP and Hitachi Data Systems 5800E / 7700E / 9910 / 9960 / 9200

Fiber Disk Array Subsystem Support

HDS 5800E/9200

DMP supports HDS 5800E/9200 Disk Array Subsystems in Active/Passive mode only.

HDS 7700E/9910/9960

DMP supports the HDS 7700E/ 9910 / 9960 Disk Array Subsystems in Active/Active

mode only.

For HITACHI model 9960, depending on the workload of the system, DMP performance

can be improved by using the vxdmpadm command to adjust the partition size for the

balanced I/O policy to a value higher than the system default of 2048 blocks. The

recommended value in the range of 32,768 to 131,072 blocks. See the VERITAS Volume

Manager Administrator’s Guide for details.

A full list of supported arrays can be found by going to the VERITAS Support web site,

http://support.veritas.com and entering “VERITAS Enabled” into the search engine.

DMP and JBOD Disk Array Support

DMP on JBOD drives enables DMP to multipath JBOD disk arrays connected to a system

using VxVM. These JBOD disk arrays/disks can contain disks from any vendor.

However, DMP can correctly detect multiple paths to these disks/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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Shark DG-3530 Installation Guide Page 36