Re: [Qemu-devel] XP install cores with SCSI LSI 53C895A disks

[Brian Jackson]

On Wed, 07 Mar 2012 13:58:21 -0600, Gerhard Wiesinger  
<address@hidden> wrote:

> On Wed, 7 Mar 2012, Brian Jackson wrote:
> > I think most people trying to use qemu for anything useful have given
> > up on if=scsi. Some distros even disable support because they don't
> > want to QA it. That should be a decent sign that you may want to avoid
> > it.
>
> OK, but SAS (Serial attached SCSI) is technology in the area of storage  
> interface technology where all big storage vendors see future (e.g. they  
> give up: FC and SATA drives, SATA drives are replaced by MDL SATA drives  
> (SATA 7200RPM drives with SAS interface)).
>
> Therefore I don't understand why distros are giving up SAS which is also  
> SCSI (of course old legacy SCSI is understandable).
>
> And legacy SCSI is of course technology from yesterday but e.g.  
> LSI53C895A has largest OS support ever as far as I know (from DOS,  
> Win95, NT4, W2K, XP, Vista, Windows 7, Linux, etc.). Also CPU usage is  
> low.


I would imagine IDE would, but I'm not as familiar with hardware support  
of Windows < XP.



> What's your preferred storage technology on QEMU?


virtio > ahci > ide



> Where do you see future?


Hopefully, Hannes' Megaraid work gets merged. That along with the other  
options above should cover most bases pretty well.


> BTW: The underlying problem I want to solve: I want to migrate a VMWare  
> Server 2.x VM based on Buslogic SCSI controller to QEMU/KVM. And
> geometry translation to IDE/SATA doesn't boot up the system ... Any  
> ideas to migrate to other storage technology (VM is offline)?


If you could boot it, I'd say you could try mergeide (I'm assuming it's  
Windows since Linux should just work).



> Ciao,
> Gerhard
>
> --
> http://www.wiesinger.com/