[ovirt-users] disk order in vm and disk order in export

Fabrice Bacchella fabrice.bacchella at icloud.com
Mon May 16 09:34:42 UTC 2016

I have a VM with the following disks (in the ordrer return by a get query):
<Disk href="/api/vms/2ddfb8c3-d258-4d3e-9f65-fc247d0a03f6/disks/1180405d-699e-4594-bf73-8b1b170f38a9" id="1180405d-699e-4594-bf73-8b1b170f38a9">
    <actual_size>17179869184</actual_size> <- 16GiB

<Disk href="/api/vms/2ddfb8c3-d258-4d3e-9f65-fc247d0a03f6/disks/1fe74758-c521-40ed-b8e5-d02d80188088" id="1fe74758-c521-40ed-b8e5-d02d80188088">
    <lun_storage id="3600c0ff00026285a2091355701000000">
        <logical_unit id="3600c0ff00026285a2091355701000000">
            <size>1099511627776</size> <- 1 TiB.

So the first one is a 16 GiB virtual disk, the second one a 1 iTB direct access LUN that will contains data.

But once booterd, I see:
sda           8:0    0     1T  0 disk 
sdb           8:16   0    16G  0 disk 

and :
ls -l /dev/disk/by-*/*
lrwxrwxrwx. 1 root root  9 May 16 09:03 /dev/disk/by-path/pci-0000:00:04.0-scsi-0:0:0:0 -> ../../sda
lrwxrwxrwx. 1 root root  9 May 16 09:03 /dev/disk/by-path/pci-0000:00:04.0-scsi-0:0:0:1 -> ../../sdb

So the first disk sda is the second non bootable disk.
What set the disk order associated to a VM ? Is there a way to enforce that the first disk is really the first disk ?
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