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Old 12-21-2009, 11:50 AM   #1
Registered: Oct 2003
Location: Florida USA
Distribution: Fedora, RHEL
Posts: 57

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Relating SAN Disk WWID to PVUID

We are looking for a way to tie a disk WWID to a PVID.

We have a situation where all of our disk lies on a SAN being used by our RHEL 5 Xen cluster. We have the disks showing up in multipath -ll as expected. We are reusing disk from a previous installation and want to make sure it is not being used by something else.

Multipath -ll shows the WWID. How do we tell if something else is using a disk identified by the WWID ? pvdisplay, vgdisplay, lvdisplay only show thier own generated UUID but do not tie it to the WWID in mulipath -ll

We need to be very careful because our Xen cluster can see all disks for migration purposes. There is always a slight possiblity that another admin may have reused a disk and simply generated another PVUID. We are looking for a way to be sure that nothing else is using a particular disk.


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