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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
dynamox
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May 11th, 2012 21:00
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
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May 11th, 2012 22:00
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
.!!
dynamox
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May 11th, 2012 22:00
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
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May 11th, 2012 22:00
that's true need to check if some one is using the device or not.
pranav_pune
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May 11th, 2012 22:00
Dynamox, is there a best practices guide for EMC Symmetrix, which I can follow while administrating the Storage System?
dynamox
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May 11th, 2012 22:00
if they have not discovered that LUN on the host, should be safe to unmask.
pranav_pune
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May 11th, 2012 22:00
I did it by mistake. I will unmask the device from other host now. Thank you dynamox.