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Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD d
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ? |
Date: |
Mon, 07 Nov 2011 12:13:18 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110930 Thunderbird/7.0.1 |
On 11/07/2011 11:04 AM, Thomas Schmitt wrote:
> In a thread on linux-hotplug, /dev/sg* is declared to be deprecated
> in favor of/dev/bsg/* and /dev/sr*.
> Will this become a problem ?
I think /dev/bsg is backwards-compatible more or less, but it would help
if it had decent documentation in the kernel tree.
> I did not succeed with googling for a way to get a block device
> running on top of file=/dev/sg*,if=virtio.
No, that's not possible with /dev/sg. But I think this helps:
-drive file=/dev/sr0,if=none,id=scsicd
-device
virtio-blk,drive=scsicd,logical_block_size=2048,physical_block_size=2048
At least here, dd works with this command line. This probably will
be fixed in QEMU 1.1 (i.e. the release after the next one).
> The word "passthrough" does not show up in the context of drive
> emulation in any documentation inside the git clone.
> I only see statements about: "passthrough" security model.
> The word "virtio" is mentioned more often, but without much explanation
> of -drive use cases and pitfalls. (Only docs/qdev-device-use.txt
> has some more detailed information.)
Yes, docs/qdev-device-use.txt helps. "qemu -device virtio-blk,?" too.
> Is there an external documentation emerging ?
> I would like to read it and contribute my experiences.
Hopefully, everything would just work. :)
You can work on wiki.qemu.org in the meanwhile.
Paolo
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, (continued)
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Thomas Schmitt, 2011/11/05
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Paolo Bonzini, 2011/11/06
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Thomas Schmitt, 2011/11/06
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Thomas Schmitt, 2011/11/06
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Paolo Bonzini, 2011/11/07
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Thomas Schmitt, 2011/11/07
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?,
Paolo Bonzini <=
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Zhi Yong Wu, 2011/11/07
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Paolo Bonzini, 2011/11/07
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Zhi Yong Wu, 2011/11/07
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Thomas Schmitt, 2011/11/06
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Andreas Färber, 2011/11/04
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Thomas Schmitt, 2011/11/04
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Zhi Yong Wu, 2011/11/07
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Thomas Schmitt, 2011/11/02
- Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with CD drives ?, Paolo Bonzini, 2011/11/02