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LUN Z, Comm Path
Hi everyone. I have a question related to the LUNZ for Unity and VNX.
Within VNX i had the option to disable the LUNZ path, is there no way to achieve this with Unity? What is the LUNZ really for? I have read several answer.
Is it needed for Windows Host with and without agents and power path?
Is it needed for ESXi Hosts?
What is the drawback of disabling it? Or leaving it on?
I also read that as soon as there is a HLUN wiht ID 0 the LUNZ disappears, is this true?
I also read that as soon as there is a HLUN LUNZ disappears, is this true?
Further on Unity and VNX it automatically tries to assign the Host LUN ID 0 to a new LUN but it seems when there is LUNZ with ID 0 that this new LUN with ID 0 is not displayed on the host side. Is this true?
I am a bit confused.......
DukeR1337
208 Posts
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October 19th, 2016 23:00
Anyone?
DukeR1337
208 Posts
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November 1st, 2016 06:00
Is there anyone who could give me a hint on this?
I would be really thankful
maniemc
169 Posts
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November 1st, 2016 16:00
Is it needed for Windows Host with and without agents and power path?
No
Is it needed for ESXi Hosts?
No
What is the drawback of disabling it? Or leaving it on?
It is just a feature for hosts to access the array even if no lun with HLU 0 is presented to the host.
I also read that as soon as there is a HLUN wiht ID 0 the LUNZ disappears, is this true? I also read that as soon as there is a HLUN LUNZ disappears, is this true?
Correct. LunZ purpose is to make the array visible to hosts when hlu0 is not assigned. This allows the host to login to the array.
Refer this for more info : LUNZ or ghost LUN explained briefly.
For unity, i think this VNXe KB should have same meaning - https://support.emc.com/kb/335382