3PAR InForm® OS 2.3.1 CLI Reference (320-200166 Rev B, March 2010)

29.5

InForm OS Version 2.3.1 Command Line Interface Reference

EXAMPLES

The following example displays the snapshot update of snapshot VV avvro:

NOTES

■ The updatevv command attempts to use the same VV IDs for new snapshots as the

snapshots that they replace so that the new VV have the same World Wide Names (WWNs)

as the originals (this might be important for hosts using the VV WWN to identify the VV).

However, between the removal of the original snapshot and the creation of the new

snapshot it is possible that another VV might have been created with the same ID causing

the creation of the new snapshot to fail. If the

–anyid option is specified, the command

then creates the snapshot with any available ID.

Because new VVs, by default, are assigned the lowest ID available, VVs that are updated

with the

updatevv command should be assigned large IDs (using the –i option to the

createaldvv command) to reduce the likelihood that their IDs are taken during the

updatevv command operation.

■ After the updatevv command is executed, all VLUNs associated with the specified VV

name are removed. The command then updates the snapshots as follows:

◆ If the –ro option is not specified, or if the specified VV name is a read-only snapshot,

the command removes the snapshot, and creates a new snapshot of the same name and

of the same parent.

◆ If the –ro option is specified and the specified VV name is a read/write snapshot, the VV

is removed and its read-only parent is replaced by a new read-only snapshot of the same

name. Then a new read/write snapshot is created of the new read-only snapshot. If the

read-only parent has multiple read/write snapshots, the

updatevv operation will fail

because the read-only parent volume cannot be removed.

The command then re-creates all the VLUNs associated with the specified VV name.

■ Running concurrent updatevv sessions for VV sets or list of VVs which have common VVs

could have unpredictable results.

cli% updatevv –f avvro

Updating VV avvro