Re: [Users] scsi disks inside VMs?

2013-03-28 Thread Andrew Cathrow

- Original Message - 

 From: Paul Jansen vla...@yahoo.com.au
 To: users@ovirt.org
 Sent: Wednesday, March 27, 2013 10:52:17 PM
 Subject: [Users] scsi disks inside VMs?

 Hello.
 I'm wondering if it is possible to create VMs with ovirt that have
 scsi disks?
 I've just installed ovirt 3.2.1 on Fedora 18 and attached an ovirt
 node (the current fedora 18 based version).

 When adding disks to a VM I can chose from the 'IDE' or 'VirtIO'
 interfaces. I'd like a scsi option also.
 Mainly because when migrating from vsphere VMs this makes things
 simpler.
 Also, my current kickstart installer for various OSes does not yet
 handle 'vd' disks.
 To add to things I need to install a custom filesystem on the vms
 that wants a scsi disk. It does a scsi inquiry early on in the
 install phase and will not work in 'vd' disks. ie: ' sg_inq
 /dev/vda' does not work.

 I also know that the libata driver in recent linux distributions
 exposes IDE drives as scsi and allows a scsi enquiry to succeed.
 Unfortunately the use case I have required Enterprise Linux 5 and in
 this release IDE disks report as 'hd', whereas scsi disks report as
 'sd'. So, I can just use an IDE disk to get around this problem.

 I understand that virt-manager will allow attaching scsi disks to KVM
 based virtual machines, and that this is made possible by recent
 changes in libvirt.

 I think we should be encouraging people to use the virtio disks where
 possible, but in cases where this is not straightforward ovirt - and
 RHEV - are missing a trick as far as allowing people that have
 existing vsphere setups to fairly easily move to ovirt.

 Is a 'scsi' interface' option for adding virtual disks for VMs on the
 roadmap? If not, could it be considered?


There are plans to add support for virtio-scsi - still paravirtualized but 
providing a pv scsi controller that gives us more features - such as passing 
scsi commands to luns, allowing more disks per vm etc.


 Thanks.

 ___
 Users mailing list
 Users@ovirt.org
 http://lists.ovirt.org/mailman/listinfo/users
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


[Users] scsi disks inside VMs?

2013-03-27 Thread Paul Jansen
Hello.
I'm wondering if it is possible to create VMs with ovirt that have scsi disks?
I've just installed ovirt 3.2.1 on Fedora 18 and attached an ovirt node (the 
current fedora 18 based version).

When adding disks to a VM I can chose from the 'IDE' or 'VirtIO' interfaces.  
I'd like a scsi option also.
Mainly because when migrating from vsphere VMs this makes things simpler.
Also, my current kickstart installer for various OSes does not yet handle 'vd' 
disks.
To add to things I need to install a custom filesystem on the vms that wants a 
scsi disk.  It does a scsi inquiry early on in the install phase and will not 
work in 'vd' disks. ie: 'sg_inq /dev/vda' does not work.

I also know that the libata driver in recent linux distributions exposes IDE 
drives as scsi and allows a scsi enquiry to succeed.  Unfortunately the use 
case I have required Enterprise Linux 5 and in this release IDE disks report as 
'hd', whereas scsi disks report as 'sd'.  So, I can just use an IDE disk to get 
around this problem.


I understand that virt-manager will allow attaching scsi disks to KVM based 
virtual machines, and that this is made possible by recent changes in libvirt.

I think we should be encouraging people to use the virtio disks where possible, 
but in cases where this is not straightforward ovirt - and RHEV - are missing a 
trick as far as allowing people that have existing vsphere setups to fairly 
easily move to ovirt.

Is a 'scsi' interface' option for adding virtual disks for VMs on the roadmap?  
If not, could it be considered?

Thanks.
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users