Remove previous Boot-From-SAN LUN from ESXi 5.5

Hi Experts,

I am moving hosts from one SAN to another one.  We are using UCS and boot from SAN.

So I zoned everything and installed VMware 5.5 to a new 15 GB LUN, I am booting from that new LUN.  The problem is that the old boot from SAN LUN is still there (accessible from the host).

I tried to do the normal Unmount and then Detach but it fails because the device still contains a diagnostic partition (from the original boot from SAN partition).

How can I delete the old coredump partition so I can remove this old, unneeded datastore?

Thank you all,

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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Remove the LUN from the SAN.
svillardiAuthor Commented:
Won't that give me an APD issue?
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
You could mask the LUN in ESXi.
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svillardiAuthor Commented:
Andrew, I deleted the LUN, although now I'm concerned about APD.

But this seems to say that VMware can now tell if the datastore is permanently deleted or not.

How can I tell if this feature is working properly?  In other words, how can I tell if I will have a problem?  Is there some CLI command which will tell me more about the storage?


Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If you re-scan the storage HBA.

have you also check the logs

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I ran into an issue like this before. I unmounts tried to unmounts a datastore from a host but no make what I did the datastore was still seen. Long story short I was not removed from the zoning on the SAN. Long story short as long as the lun is zoned to a host it will show up
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