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:
Would you like to continue (y/
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
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.
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 .!!
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.
Dynamox, is there a best practices guide for EMC Symmetrix, which I can follow while administrating the Storage System?