Re: [Xen-users] HVM phy: disks not working; file: disks no problem

[John Morris <jman@xxxxxxxxxxx>]

Holy moly, that did the trick!  Thanks!

   John


Mark Walkom wrote:
> In my experience I've always used full paths to the LV, so;
>   disk =  [ 'phy:/dev/domU/w2k30.root,hda,w' ]
>
> It's worked for me.
>
> 2008/12/19 John Morris <jman@xxxxxxxxxxx <mailto:jman@xxxxxxxxxxx>>
>
>     CentOS 5.2 dom0 w/fairly recent updates on x86_64, xen 3.2.0 RPM
>     from xensource recompiled for x86_64, Win 2k3 domU (with GPL PV
>     drivers).
>
>     With HVM, phy: disks on LVs won't work, although the same host has
>     many PV CentOS hosts running no problem from LVs.  The file: disks
>     work with no problems.  The disk configurations I've tried:
>
>     Neither works:
>       disk =  [ 'phy:domU/w2k30.root,ioemu:hda,w' ]
>       disk =  [ 'phy:domU/w2k30.root,hda,w' ]
>
>       Selected logs:
>       [2008-12-19 12:00:11 3365] INFO (XendDomainInfo:1504)
>     createDevice: vbd : \
>           {'uuid': 'dada2695-5fdd-85c9-3990-8d1978a35782', 'bootable':
>     1, 'driver': 'ioemu', \
>           'dev': 'ioemu:hda', 'uname': 'phy:domU/w2k30.root', 'mode': 'w'}
>       [2008-12-19 12:00:12 3365] INFO (XendDomainInfo:1273) Domain has
>     shutdown: name=w2k30 id=63 reason=poweroff.
>
>     Works:
>       disk  =  [ 'file:/d/distro.w2k3/w2k30.root,hda,w', ]
>       disk  =  [ 'tap:aio:/d/distro.w2k3/w2k30.root,hda,w' ]
>
>       Selected logs:
>       [2008-12-19 12:05:15 3365] INFO (XendDomainInfo:1504)
>     createDevice: tap : \
>           {'bootable': 1, 'uname':
>     'tap:aio:/d/distro.w2k3/w2k30.root', 'mode': 'w', 'dev': '\
>           hda', 'uuid': 'ee5b79fa-2286-dcab-9864-21af8fce8a8e'}
>
>     With the phy: disk, the host will begin to boot, but then
>     immediately shut down.  The phy: disk image was created by dding
>     the file from the installed file: image into the blank phy: LV.
>
>     If booted from the win2k3 install CD (cdrom specified as file:,
>     disk as phy:), the install hangs forever at "Setup is starting
>     Windows", presumably as it's trying to grok the hard drive
>     configuration.
>
>     I managed to get the domain to pause during the Plex86/Bocks Bios,
>     and see the disk detection as follows:
>       ata0 master: QEMU HARDDISK ATA-7 Hard-Disk (   0 MBytes)
>       ata0  slave: Unknown device
>
>       Booting from Hard Disk...
>
>     At this point the domain shuts down.
>
>     More information:
>
>       [root@xen-3 distro.w2k3]# lvs /dev/domU/w2k30.root
>         LV         VG   Attr   LSize Origin Snap%  Move Log Copy%  Convert
>         w2k30.root domU -wi-a- 5.19G
>       [root@xen-3 distro.w2k3]# fdisk -l /dev/domU/w2k30.root
>
>       Disk /dev/domU/w2k30.root: 5570 MB, 5570035712 bytes
>       255 heads, 63 sectors/track, 677 cylinders
>       Units = cylinders of 16065 * 512 = 8225280 bytes
>
>                      Device Boot      Start         End      Blocks  
>     Id  System
>       /dev/domU/w2k30.root1   *           1         660     5301418+  
>     7  HPFS/NTFS
>     Complete config file follows.  Let me know what else I can provide
>     to debug this problem.  Thanks-
>
>       John
>
>
>     #
>     # xen configfile for host w2k30.bt1.ablesky.com
>     <http://w2k30.bt1.ablesky.com>
>     # use 'xm create w2k30 mode=install' to boot from w2k3 install CD
>     #
>     name = "w2k30"
>     memory = 1024  # memory for normal operation
>     shadow_memory = 8
>     #
>     # disks
>     #disk =  [ 'phy:domU/w2k30.root,ioemu:hda,w', ]
>     #disk  =  [ 'file:/d/distro.w2k3/w2k30.root,hda,w', ]
>     disk  =  [ 'tap:aio:/d/distro.w2k3/w2k30.root,hda,w' ]
>     #
>     # network interfaces
>     vif = [ "mac=00:16:ee:a8:c8:26, type=ioemu, bridge=btbr,
>     model=e100", ]
>     #
>     kernel = "/usr/lib64/xen/boot/hvmloader"
>     builder = "hvm"
>     device_model = "/usr/lib64/xen/bin/qemu-dm"
>     localtime=1
>     sdl = 0
>     vnc = 1
>     vnclisten = "0.0.0.0"
>     vncdisplay = 1
>     vncconsole = 1
>     vncunused = 0
>     vncpasswd = ""
>     nographic = 0
>     stdvga = 0
>     usbdevice='tablet'
>     serial = 'pty'
>     vcpus=1
>     pae=1
>     acpi=1
>     apic=1
>     #
>     # test if mode variable is defined
>     try:
>       mode
>     except NameError:
>       mode = 'normal'
>     #
>     if mode not in ('install','reinstall'):
>           # this is for after install
>           boot = 'c'
>           on_reboot   = 'restart'
>           on_crash    = 'restart'
>     else:
>           # these are for install
>           disk = [
>     
> 'file:/d/distro.w2k3/en_win_srv_2003_r2_datacenter_with_sp2_vl_cd1.iso,hdb:cdrom,r',
>     \
>                  
>      'file:/d/distro.w2k3/en_win_srv_2003_r2_datacenter_with_sp2_vl_cd2.iso,hdc:cdrom,r'
>     ] + \
>                  disk
>           boot        = 'd'
>           on_reboot   = 'destroy'
>           on_crash    = 'destroy'
>
>
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--
John Morris
Vice President, Asia-Pacific Region
AbleSky, Inc.
+86-10-8885-5525 ext. 102 (Beijing, China) 1-650-694-7960 ext. 102 
+(Mountain View, CA)

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