Hi all,
Disclaimer: I''m entirely new to Xen, and am just testing it out for
the first time with serious desire to consolidate servers. I have
searched the ~2 months of archives of this list I have in GMail ;-)
and the online list archive search seems broken :-( Also, I have not
compiled a kernel in a couple years...
All that out of the way, I ran into a hitch while installing Xen
(2.0.3) for the first time -- that being that it can''t seemingly see
my root partition. The environment is VMWare 5 (Beta) for Windows and
RHEL 4 (Beta; actually CentOS 4.0 Beta). Xen seems like it started to
work, but when it tried to mount the virtual SCSI drive (under virtual
LSI SCSI card) it couldn''t find it.
I went into the kernel source (2.6.10) that the install script copied
into the Xen source directory and per instructions went to add modular
SCSI support for the virtual SCSI card. Unfortunately I did not find
anything relevant under SCSI Low Level Drivers. Curious, I looked at
the same menu options under the 2.6.9 kernel source that comes with
RHEL/CentOS, and there was a plethora of options.
I''ve read several folks discussing SCSI cards on this list, so I have
to think that Xen can boot from a SCSI disk. Is it the case that
every device driver must be modified for use with Xen and the LSI
driver just hasn''t been modified yet? Or did I screw up elsewhere?
TIA,
-Fred
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Ah hah, I answered my own question, I was looking in the wrong kernel
source tree (xenU rather than xen0). I compiled my kernel, make the
initrd, and got it all setup. Now the dom0 kernel seems to see the
SCSI (virtual SCSI) drive okay, but I''ve run into trouble in the next
step -- getting the filesystem mounted. It seems this kernel can''t
read the partition table, and I suspect it has something to do with
the way newer versions of Red Hat label partitions.
This may be more of a Red Hat / Linux kernel issue than a Xen issue,
but does anyone have any ideas? The final messages on-screen leading
up to the failure are:
Loading mptscsih.ko module
Fusion MPT SCSI Host driver 3.01.18
SCSI0 : ioc0: LSI53C1030, FwRev=0000000000h, Ports=1, MaxQ=128, IRQ=17
...
sda : sector size 0 reported, assuming 512.
SCSI device sda: 1 512-byte hdwr secotrs (0 MB)
sda: asking for cache data failed
sda: assuming drive cache: write through
sda : secotr size 0 reported, assuming 512.
SCSI device sda: 1 512-byte hdwr sectors (0 MB)
sda: asking for cache data failed
sda: assuming drive cache: write through
sda: unknown partition table
Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
Creating root device
Mounting root filesystem
mount: error 6 mounting ext3
mount: error 2 mounting none
Switching to new root
switchroot: mount failed: 22
umount /initrd/dev failed: 2
Kernel panic - not syncing: Attempted to kill init!
<0>Rebooting in 1 seconds..
Thanks!
-Fred
On Sun, 30 Jan 2005 12:21:11 -0500, Fred Whipple <fwhipple@gmail.com>
wrote:> Hi all,
>
> Disclaimer: I''m entirely new to Xen, and am just testing it out
for
> the first time with serious desire to consolidate servers. I have
> searched the ~2 months of archives of this list I have in GMail ;-)
> and the online list archive search seems broken :-( Also, I have not
> compiled a kernel in a couple years...
>
> All that out of the way, I ran into a hitch while installing Xen
> (2.0.3) for the first time -- that being that it can''t seemingly
see
> my root partition. The environment is VMWare 5 (Beta) for Windows and
> RHEL 4 (Beta; actually CentOS 4.0 Beta). Xen seems like it started to
> work, but when it tried to mount the virtual SCSI drive (under virtual
> LSI SCSI card) it couldn''t find it.
>
> I went into the kernel source (2.6.10) that the install script copied
> into the Xen source directory and per instructions went to add modular
> SCSI support for the virtual SCSI card. Unfortunately I did not find
> anything relevant under SCSI Low Level Drivers. Curious, I looked at
> the same menu options under the 2.6.9 kernel source that comes with
> RHEL/CentOS, and there was a plethora of options.
>
> I''ve read several folks discussing SCSI cards on this list, so I
have
> to think that Xen can boot from a SCSI disk. Is it the case that
> every device driver must be modified for use with Xen and the LSI
> driver just hasn''t been modified yet? Or did I screw up
elsewhere?
>
> TIA,
>
> -Fred
>
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> Disclaimer: I''m entirely new to Xen, and am just testing it out forWelcome :-)> All that out of the way, I ran into a hitch while installing Xen > (2.0.3) for the first time -- that being that it can''t seemingly see > my root partition. The environment is VMWare 5 (Beta) for Windows and > RHEL 4 (Beta; actually CentOS 4.0 Beta). Xen seems like it started to > work, but when it tried to mount the virtual SCSI drive (under virtual > LSI SCSI card) it couldn''t find it. > > I went into the kernel source (2.6.10) that the install script copied > into the Xen source directory and per instructions went to add modular > SCSI support for the virtual SCSI card.If you''re going to boot off it, you need to build support statically into the kernel. Modular support won''t do because without the driver it won''t have anywhere to load the module from! (unless you put the module into an initrd but that complicates things so I''m not going to describe that)> Unfortunately I did not find > anything relevant under SCSI Low Level Drivers. Curious, I looked at > the same menu options under the 2.6.9 kernel source that comes with > RHEL/CentOS, and there was a plethora of options.Are you sure you were looking in the right place? Try: cd linux-2.6.10-xen0 make ARCH=xen menuconfig <now go to Device Drivers/SCSI Device Support/SCSI Lowlevel Drivers and switch the option for your preferred device to y> <now exit menuconfig, saving the configuration> cp .config ../dist/install/boot/config-2.6.10-xen0 cd .. make dist make install> I''ve read several folks discussing SCSI cards on this list, so I have > to think that Xen can boot from a SCSI disk. Is it the case that > every device driver must be modified for use with Xen and the LSI > driver just hasn''t been modified yet? Or did I screw up elsewhere?Non-buggy Linux device drivers should work fine with Xen. There are occasional cases of x86-centric driver writers taking liberties that need to be corrected but generally people don''t have problems here. HTH, Mark> > TIA, > > -Fred > > > ------------------------------------------------------- > This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting > Tool for open source databases. Create drag-&-drop reports. Save time > by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. > Download a FREE copy at http://www.intelliview.com/go/osdn_nl > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/xen-devel------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel