[pve-devel] integration of scsi-hd, scsi-block, scsi-generic

Stefan Priebe s.priebe at profihost.ag
Sat Aug 11 23:03:35 CEST 2012

Hello list,

right now when you select SCSI proxmox always use scsi-hd for device. 
With virtio-scsi-pci as scsihw we can also select scsi-block or 

With scsi-block and scsi-generic you can bypass qemu scsi emulation and 
use trim / discard support as the guest can talk directly to the 
underlying storage.

Also scsi-generic (needs guest kernel 3.4) is a lot faster then scsi-hd 
or scsi-block.

What would be the expected way to integrate a selection between them in 


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