Need to create a cascaded business copy

[cjb_1]

Derek

I'm trying to relate your problem with our environment. Copy of a copy is configured in the same horcm files, its just a matter of getting the MU#'s sorted out.

The copy should work for any one of you L1 copies but to amend my first post make the MU# for the source disks 1 not 0.

So, to horcm0.conf add:
stby2_bcv4 erp3-1 60188 0b:00 1
stby2_bcv4 erp3-2 60188 0b:01 1
stby2_bcv4 erp3-3 60188 0b:02 1
stby2_bcv4 erp3-4 60188 0b:03 1
stby2_bcv4 erp3-5 60188 0b:04 1

stby2_bcv4 urrtw01b horcm1

If you wanted a second copy of a copy you'd do:

stby2_bcv5 erp4-1 60188 0b:00 2

[Derek Brown]

Chris

Thanks for your reply. Just to confirm as I dont want to overwrite any data !! Are you saying the added entries should be :

To horcm0.conf add:
stby2_bcv4 erp3-1 60188 0b:00 1
stby2_bcv4 erp3-2 60188 0b:01 1
stby2_bcv4 erp3-3 60188 0b:02 1
stby2_bcv4 erp3-4 60188 0b:03 1
stby2_bcv4 erp3-5 60188 0b:04 1

stby2_bcv4 urrtw01b horcm1

And horcm1.conf
stby2_bcv4 erp3-1 60188 09:00
stby2_bcv4 erp3-2 60188 09:01
stby2_bcv4 erp3-3 60188 09:02
stby2_bcv4 erp3-4 60188 09:03
stby2_bcv4 erp3-5 60188 09:04

stby2_bcv4 urrtw01b horcm0

?
If so , ot seems a little unusual as MU = 1 has already been used in horcm0.conf and the luns you refer to don't exist. Or am I picking you up incorrectly. Sorry to be so pedantic, just I dont want to overwrite any data anywhere.

Thanks
Derek

[cjb_1]

Always best to triple check these configs.

MU 1 was used to define the second of your L1 copies from the primary luns. We now want to define the copy of a copy. Cant use 0, this is assigned to the L1 copy from which we want to take the replica so next available is 1.

The luns i describe exist with the correct data once the business copy has completed. For this reason, when you schedule this up, you obviously have to ensure the business copy described in stby2_bcv1 completes prior to running bcv4.

As far as overwriting data goes that is something to check before you create the pair. The key here is to get the vector remote/local switch the right way round.

[Derek Brown]

Chris

Thanks for your help but I'm totally confused now. Sorry for being so dull over this. It's just it looks like you are asking me to use luns that I've never mentioned and dont have (0b:00, 0b:01, etc); and also, I've already used MU 0,1 and 2 in horcm0.conf (source data) yet it looks like you are asking me to use MU 1 in horcm0.conf again! or am I misunderstanding you. Basically the cascade needs to copy from :
stby2_bcv3 erp2-1 60188 0c:42
stby2_bcv3 erp2-2 60188 0c:43
stby2_bcv3 erp2-3 60188 0c:44
stby2_bcv3 erp2-4 60188 0c:45
stby2_bcv3 erp2-5 60188 0c:46

to:
stby2_bcv4 erp3-1 60188 09:00
stby2_bcv4 erp3-2 60188 09:01
stby2_bcv4 erp3-3 60188 09:02
stby2_bcv4 erp3-4 60188 09:03
stby2_bcv4 erp3-5 60188 09:04

Can we start again please. Can you explicity show the additions that are required to the horcm files including the MU numbers please ?

Also , in order to create the initial L1 pairs I used (with HORCMINST=0):
paircreate -g stby2_bcv1 -vl
paircreate -g stby2_bcv2 -vl
paircreate -g stby2_bcv3 -vl

Now, in order to create the L2 cascade do I simply use :
paircreate -g stby2_bcv4 -vl

Many thanks, and apologies for all this long windedness.

Derek

[cjb_1]

Derek

I was looking at the horcm files you attached to the post. Those luns are associated with the first of you business copies?

You config is equally as valid, you will be using the 3rd set of disks, add the '1' to the end of the line and you'll be fine.

The paircreate looks fine too.

So for your changes:
To horcm0.conf add:
stby2_bcv4 erp3-1 60188 0c:42 1
stby2_bcv4 erp3-2 60188 0c:43 1
stby2_bcv4 erp3-3 60188 0c:44 1
stby2_bcv4 erp3-4 60188 0c:45 1
stby2_bcv4 erp3-5 60188 0c:46 1

stby2_bcv4 urrtw01b horcm1

And horcm1.conf
stby2_bcv4 erp3-1 60188 09:00
stby2_bcv4 erp3-2 60188 09:01
stby2_bcv4 erp3-3 60188 09:02
stby2_bcv4 erp3-4 60188 09:03
stby2_bcv4 erp3-5 60188 09:04

stby2_bcv4 urrtw01b horcm0