DG STD BCV

1) which system create DG?
Like "gni00101_vg01", such DG was created by which system?

DG names is created by ourselves.
System would not create DGs.

2) Why we create DG?

While create a Storage on a new host, we should take Backup for the host data.
So in VMAX, for replicating the production volume data, and there is a technique called timefinder/clone.
So, we'll create STD volume (Production) and BCV volumes (Copy of Production volume) as a group.
Such Group is theoretically called as Device Group.
For initiating copy from production volume to backup volume--we'll create a clone relation ship on every DG.
DG is simply like a mapping of STD volume to BCV volume.


The process of creating DGs is called DG setting.

For GDC,

We'll do DG setting on Gepbkp01 gepbkp02 gepbkp07.

DRC:

We'll do DG setting on Gepbkp05 gepbkp06 gepbkp09.

JDC:

We'll do DG setting on bkj0d101 bkj0d201 and production server.

3) Why is the STD device can deleted on backup server?

STD devices is deleted from Backup server or production server-It is actually deleting the STD devices from the RE Spective Device groups.
Since We are decommissioning the host and we have to remove the host production volumes from taking copy to BCV volume.
For this, we'll just remove the STD and BCV devices from the respective DGs.
We'll also terminate the Clone relation between and the volumes.

Thanks for your questions.
If you need any further clarification, I am ready for help.

Thank for learning.

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In Vmax, use time finder/clone to ensure the redundancy of the production machine, hang the STD disk on the storage and hang it to production SERVER,BCV to the backup server.

DG STD BCV