Can VPD Unit Serial Number be persistent?

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Hi:

I am creating an iSCSI LUNs using iblock back end storage.

I notice that my VPD Unit Serial Number is different each time my server
reboots. That does not seem right.

Is this a bug?

I looked back through the list archives and saw that you do not allow
this attribute to be set at back store creation time, but there is an
option to tell it not generate a WWN. (using generate_wwn=false)

But when I do that I get no VPD Page 0x83 data at all, and the name of
the resulting target, once connected, in /dev/disk/by-id is scsi-1LIO-ORG.

It does not seem right that the identity of the disc changes each time
the server is rebooted.
-- 
Lee Duncan

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