@bvitnik It's specific to XCP-ng.
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RE: How to reliably determine VDI format (vhd, qcow2, raw) via XAPI across versions
@bvitnik Hello,
sm-config:vdi_typeis the pre-existing one so we are still writing it for compatibility reasons.
But you might notice thatvdi_typeis only written for LVM-based SRs.
Whileimage-formatis always written in XCP-ng with the QCOW2 feature.So it might be safe to just look at
image-formatif it exist and if it's not, it's likely a VHD.
On LVMSR, you can fallback onvdi_type(and it should work for XS too).Indeed, ISO SRs do not advertise a VDI format. Technically, ISOs could be considered to be
raw.It should also be noted that our implementation of QCOW2 is very different from GFS2 QCOW2 of XenServer.
Our implementation uses the existing SR types to allow VHD and QCOW2 to co-exist.
