Is a SCSI Tape Drive visible to Guest VMs attached to a Hypervisor Host?
I am converting to RHEV from vmware ESX3. I have a SCSI tape drive on my currect ESX box that the locally running guest VM can see. Is this also possible with RHEV? If not, what are my options?
Responses
Red Hat
25369 points
Hi Scott,
I'll see if I can find someone who'll be able to answer this for you.
Guru
6863 points
Hey Scott - I'll apologize in advance for not being thorough on this response (first day back after Summit and I have a ton of catch-up ...)
I have searched on 'SCSI passthru' before to accomplish what you are after. I do not recall if I found a solution that would work, or not.
http://wiki.qemu.org/Features/VirtioSCSI
http://www.linux-kvm.com/content/virtio-scsi
I will try to revisit this thread when I get more time, otherwise - hopefully someone else can chime in also.
Guru
6863 points
Everything I find continues to point back to the example at linux-kvm.org, which indicates this would work on KVM without and issue, but also requires a command-line modification. (I found that KVM actually set a new record for the number of IOPs using SCSI-passthru).
RHEV 3.0 allowed Direct LUN access as a custom hook, and then it was included as a feature in 3.1.
The oVirt documentation also references virtio-scsi which should allow the access needed. Unfortunately I do not have the hardware to test/validate any of this. :-(
http://www.ovirt.org/Features/Virtio-SCSI#Adding_a_DirectLUN_Disk_.28lun_passthrough.29
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