Creating FlashCopy mappings by using the CLI

You can use the command line interface (CLI) to create FlashCopy® mappings.

Before you begin

A FlashCopy mapping specifies the source and target volume. Source volumes and target volumes must meet these requirements:

They must be the same size.
They must be managed by the same system.

About this task

A volume can be the source in up to 256 mappings. A mapping is started at the point in time when the copy is required.

This task creates FlashCopy mappings:

Procedure

The source and target volume must be the exact same size. Issue the lsvdisk -bytes CLI command to find the size (capacity) of the volume in bytes.
Issue the mkfcmap CLI command to create a FlashCopy mapping.
This CLI command example creates a FlashCopy mapping and sets the copy rate:
```
mkfcmap -source mainvdisk1 -target bkpvdisk1
	-name main1copy -copyrate 75
```
Where mainvdisk1 is the name of the source volume, bkpvdisk1 is the name of the volume that you want to make the target volume, main1copy is the name that you want to call the FlashCopy mapping, and 75 is the copy rate (which translates to MB per second).

This is an example of the CLI command you can issue to create FlashCopy mappings without the copy rate parameter:
```
mkfcmap -source mainvdisk2 -target bkpvdisk2
	-name main2copy
```
Where mainvdisk2 is the name of the source volume, bkpvdisk2 is the name of the volume that you want to make the target volume, main2copy is the name that you want to call the FlashCopy mapping.
Note: The default copy rate of 50 (which translates to 2 MB per second) is used when you do not specify a copy rate.

If the specified source and target volumes are also the target and source volumes of an existing mapping, the mapping that is being created and the existing mapping become partners. If one mapping is created as incremental, its partner is automatically incremental. A mapping can have only one partner.

Issue the lsfcmap CLI command to check the attributes of the FlashCopy mappings that were created:

This is an example of a CLI command that you can issue to view the attributes of the FlashCopy mappings:

lsfcmap -delim :

Where -delim specifies the delimiter and is an example of the output that is displayed:


id:name:source_vdisk_id:source_vdisk_name:target_vdisk_id:target_vdisk_name:
group_id:group_name:status:progress:copy_rate:clean_progress:incremental
0:main1copy:77:vdisk77:78:vdisk78:::idle_or_copied:0:75:100:off
1:main2copy:79:vdisk79:80:vdisk80:::idle_or_copied:0:50:100:off