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I am trying to deploy a self-host oVirt Engine on a SAN HP MSA P2000 G3 LUN. I created a Vdisk and a volume via the Storage Management Utility (SAN GUI). The volume is already containing data because of previous tests and oVirt documentation specifies that

LUNs cannot be reused, as is, to create a storage domain or virtual disk. If you try to reuse the LUNs, the Administration Portal displays the following error message: Physical device initialization failed. Please check that the device is empty and accessible by the host.

The solution they give is to use dd if=/dev/zero of=/dev/mapper/LUN_ID

Is there a better way to clean LUN via the MSA P2000 GUI or another command line faster than dd (I need to clean 0.5 TB)?

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  • Can't you just remove the LUN and create a new one?
    – Vadim
    Oct 10, 2018 at 14:04
  • I tried but it does not work unfortunatly
    – Ninroot
    Oct 10, 2018 at 14:49
  • IMHO you shouldn't zero the whole volume. Just a bit in the beginning. Try something like dd if=/dev/zero of=/dev/mapper/LUN_ID bs=1M count=1
    – Vadim
    Oct 10, 2018 at 20:38

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you don't need to dd the entire LUN full of zeroes, just a few MB at the beginning. Try dd if=/dev/zero of=/dev/mapper/LUN bs=1M count=100

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