Shark DG-3530 Installation Guide download pdf (Page 25)

Extended Copy Service

The Extended Copy Service feature of VxVM automatically works in tandem with the

extended copy engines from array vendors. When VxVM detects that the source and

destination devices are enabled for extended copy, VxVM automatically off loads copy

requests to the array’s copy manager.

The benefits of VxVM Extended Copy Service are:

◆ Non-disruptive copy operations from disk to disk. The host server remains online

during the copy and the data being copied remains accessible to the server.

◆ Server-free copy operation. The copy operation is done between the array subsystem

and the target disk. The data copy operation does not use any CPU or I/O resources

on the host server.

To see whether the Extended Copy Service feature is enabled on a disk, use the vxprint

command as shown in the following example. The feature is enabled if an

ecopy_enabled entry appears in the flags line.

# vxprint -l disk03

Disk group: rootdg

Disk: disk03

info: diskid=1234567890.59.vm250e1.veritas.com

assoc: device=c2t2d0s2 type=auto <== NEW

flags: autoconfig ecopy_enabled

device: pubpath=/dev/vx/dmp/c2t2d0s4

privpath =/dev/vx/dmp/c8t2d0s3 ,== NEW

devinfo: publen=35354136 privlen=9167

Note If required, you can use the -o noecopy option to turn off Extended Copy Service

for each invocation of the vxplex att, cp, mv and snapstart commands, and the

vxsd mv command.

Enabling a Disk for Ecopy Operation

To enable a disk for ecopy operation:

1. Install the Hardware Assisted copy license

2. Enable the Extended copy features in the array. (This procedure is vendor specific.)

3. Install the vendor ASL that supports the ecopy feature. contact VITA@veritas.com for

vendor ASL information.

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Shark DG-3530 Installation Guide Page 25