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

[Alexandre DERUMIER]

>> right now when you select SCSI proxmox always use scsi-hd for device. 
not totally true, we use scsi-block if device is an scsi device on host.
(but indeed with libiscsi it's always scsi-hd)


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

does scsi-block works with libiscsi with kvm 1.1 ? (so we can select it by default is we use libiscsi)


about scsi-generic, what happen is the guest has a kernel < 3.4 ?


----- Mail original ----- 

De: "Stefan Priebe" <s.priebe at profihost.ag> 
À: pve-devel at pve.proxmox.com 
Envoyé: Samedi 11 Août 2012 23:03:35 
Objet: [pve-devel] integration of scsi-hd, scsi-block, scsi-generic 

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 
scsi-generic. 

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 
proxmox? 

Greets, 
Stefan 
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