pranav_pune
2 Iron

Getting warning while masking a device to a host hba port

Hello I am trying to mask a device to my host hba port, but when I run symmask command to mask the device, I get message saying device is already assigned to another port. I followed following steps,

[root@chania test-bin]# symmask refresh -sid 0421 -noprompt

Symmetrix FA/SE directors updated with contents of SymMask Database 000190300421

[root@chania test-bin]# symcfg discover

This operation may take up to a few minutes. Please be patient...

[root@chania test-bin]# symmask -sid 0421 -wwn 210000e08b925b19 -dir 16d -p 1 add dev 0292
The following devices are already assigned in at least one entry:

0292

Would you like to continue (y/)?n

The devices were not added to database.

[root@chania test-bin]# sympd list | grep 0292

[root@chania test-bin]# symmaskdb list assignment -dev 0292 -sid 0421

Symmetrix ID : 000190300421

Device  Identifier        Type   Dir:P
------  ----------------  -----  ----------------
0292    210000e08b925b17  FIBRE  FA-16D:1

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7 Replies
dynamox
6 Thallium

Re: Getting warning while masking a device to a host hba port

that tells you that device is already masked to another initiator, typically if you have a host with two HBAs you will get that warning after you masked your device to the first HBA.

pranav_pune
2 Iron

Re: Getting warning while masking a device to a host hba port

ok, got it, what if I am assgning the device to two different host HBAs. What will happen in that case? I have masked the device to two different host HBAs .!!

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dynamox
6 Thallium

Re: Getting warning while masking a device to a host hba port

is that what you want or you did it by mistake ?  If you have some kind of cluster then that is normal to present one device to multiple hosts.

pranav_pune
2 Iron

Re: Getting warning while masking a device to a host hba port

I did it by mistake. I will unmask the device from other host now. Thank you dynamox.

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pranav_pune
2 Iron

Re: Getting warning while masking a device to a host hba port

Dynamox, is there a best practices guide for EMC Symmetrix, which I can follow while administrating the Storage System?

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dynamox
6 Thallium

Re: Getting warning while masking a device to a host hba port

if they have not discovered that LUN on the host, should be safe to unmask.

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pranav_pune
2 Iron

Re: Getting warning while masking a device to a host hba port

that's true need to check if some one is using the device or not.

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