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

["Liang Yang" <multisyncfe991@xxxxxxxxxxx>]

Hi Keir and Mats,

When I booted into native RHEL4.4, /dev/cdrom is linked to hda. My CD-ROM is 
the only IDE device and my OS hard disk is the SATA. When I booted into 
Xen(on the same platform with the same distribution) I can NOT find ANY hd* 
device under /dev/ (SATA hard disk is listed correctly though). So what Mats 
said does not apply here. Could this be a bug for Xen 3.0.3?
Best regards,

Liang

----- Original Message ----- 
From: "Keir Fraser" <keir@xxxxxxxxxxxxx>
To: "Liang Yang" <multisyncfe991@xxxxxxxxxxx>; "Petersson, Mats" 
<Mats.Petersson@xxxxxxx>; <xen-devel@xxxxxxxxxxxxxxxxxxx>
Cc: <xen-users@xxxxxxxxxxxxxxxxxxx>
Sent: Friday, December 01, 2006 9:44 AM
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?
>
> -- Keir

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