add a TDEV to another storage group

Question

hi, i have a tdev 0100 in a storage group SG_1 which is in a view V_view1 and i want to move it to antother storage group SG_2 which is in another view V_view2 i test all the above commands : # symaccess -sid xx -name SG_2 -type storage add dev 0100 #symsg -sid xx -sg SG_2 add dev 0100 #symsg -sid xx -sg SG_1 move dev 0100 SG_2 and the result for all those commands is the message: 'the operation cannot proceed because one or more device(s) is already masked within a view' but a device can belongs to many storage group ? VMAX SE version: 7.3.2.2 what did i miss or that i forgot ? thanks for you reply

Sam Claret · Accepted Answer

There is a simple rule for device masking on a VMax

The IG/PG/SG component combination for a specific device (any device) must be unique.

So if you have a MV with

IG = HBA1

PG = FA1

SG = device 100

and you create a new MV2 with

IG2 = HBA1,HBA2

PG2 = FA1, FA2

SG2 = device 100

This will fail as the HBA1/FA1/device 100 combination is non unique.

Now this may be a failure of the mismatch between the first and second Views - or it may be a failure between a third view and the second view.

So firstly you need to identify which Views the device is in currently and then see if there are any combinations (as above) that would prevent it from being in the 'second' view.

Sam Claret TSE3

Global Technical Support – SSG Windows

EMC Corporation

Hours: 7:00 AM - 4:00 PM GMT Rotating Shift

Phone: 800-782-4362 ext 6461204

For a complete local country dial list [click here ]

Email: sam.claret@emc.com

elearning · Answer

thanks a lot, this is my problem

the two Views have the same IG and PG groups.

the unique solution is to delete the device from the SG_1 and add to the storage group SG_2

is it right ?

i do not lost data because i don't have to unbound the tdev ?

is it right too?

thanks for your reply

Sam Claret · Answer

This is correct - you will not lose data - however the host will lose access to the disk between it being removed from the first view and added to the second view.

Sam Claret TSE3

Global Technical Support – SSG Windows

EMC Corporation

Hours: 7:00 AM - 4:00 PM GMT Rotating Shift

Phone: 800-782-4362 ext 6461204

For a complete local country dial list [click here ]

Email: sam.claret@emc.com

elearning · Answer

thanks a lot it works well.

joe_wagher · Answer

could you have MV1 IG = HBA1,HBA4 PG = FA1 SG = device 100 create MV2 IG = HBA2, HBA6 PG = FA1 SG = device 100 so the port group and devices are the same but everything else is different.

tiro1 · Answer

Yes, you can. FAs and devices can be shared between groups, but not HBAs. Port groups can be shared between Masking Views, but not Storage groups.

VMAX

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