RE: [Xen-devel] Re: [Xen-users] Can not find the cdrom device in /dev/ after booted into xen(3.0.3)

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Keir Fraser
> Sent: 01 December 2006 16:45
> To: Liang Yang; Petersson, Mats; xen-devel@xxxxxxxxxxxxxxxxxxx
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] Re: [Xen-users] Can not find the 
> cdrom device in /dev/ after booted into xen(3.0.3)
> 
> On 1/12/06 16:38, "Liang Yang" <multisyncfe991@xxxxxxxxxxx> wrote:
> 
> > 2. If I want to install HVM Linux from CDROM instead of 
> file image, how can
> > I define the cdrom in .hvm file:
> > disk = [ 'phy:/dev/sdb,hda,w', 'phy:/dev/cdrom,hdc:cdrom,r' 
> ] will not work
> > as /dev/cdrom is not available. Then I tried disk = [ 
> 'phy:/dev/sdb,hda,w',
> > 'phy:/dev/hdc,hdc:cdrom,r' ]. It still does not work as 
> /dev/hdc is not
> > available either.
> > 
> > How can I create /dev/hdc for my cd-rom?
> 
> When you boot native RHEL4.4, what is /dev/cdrom a symlink 
> to? You should
> try using the target of the symlink as the physical device 
> target in your
> HVM config file. If the target of the symlink also does not exist when
> running on Xen then it is likely that your XenLinux kernel 
> does not include
> an appropriate driver for your CDROM device. Perhaps it is a 
> SATA drive
> connected to a SATA chipset for which our kernel does not 
> have a driver?

I'd say that the most likely scenario is that /dev/hdc isn't the device
that is your CDROM. If your hard-disk is /dev/sd<something>, then
chances are that the /dev/hda could be the CDROM drive (as, indeed, it
could be even on a machine that uses /dev/hd<something> as the "disk
device", since you could very well connect the first IDE controller to
the CDROM and the second to the DISK, or some such). 

--
Mats
> 
>  -- Keir
> 
> 
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> 
> 
> 



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