When DomU started checked for "feature-barrier" (DomId = 5) :
[EMAIL PROTECTED] ~]# xenstore-ls /local/domain/0/backend/vbd/5
 6 = ""
 domain = "Solaris78"
 frontend = "/local/domain/5/device/vbd/6"
 dev = "6"
 state = "4"
 params = "/usr/lib/xen-solaris/snv78.iso"
 mode = "r"
 online = "1"
 frontend-id = "5"
 type = "file"
 node = "/dev/loop0"
 physical-device = "7:0"
 hotplug-status = "connected"
 sectors = "7177600"
 info = "4"
 sector-size = "512"
2073 = ""
 domain = "Solaris78"
 frontend = "/local/domain/5/device/vbd/2073"
 dev = "sdb9"
 state = "4"
 params = "/dev/sdb9"
 mode = "w"
 online = "1"
 frontend-id = "5"
 type = "phy"
 physical-device = "8:19"
 hotplug-status = "connected"
 sectors = "32146002"
 info = "0"
 sector-size = "512"

Property not present

[EMAIL PROTECTED] vm]# vi Solaris78.conf
[EMAIL PROTECTED] vm]# cat Solaris78.conf
name = "Solaris78"
vcpus = 1
memory = "1024"
kernel = "/usr/lib/xen-solaris/unix-78"
ramdisk = "/usr/lib/xen-solaris/x86.miniroot-78"
extra = "/platform/i86xpv/kernel/amd64/unix -kd - nowin -B install_media=cdrom"
disk = ['file:/usr/lib/xen-solaris/snv78.iso,6:cdrom,r','phy:/dev/sdb9,sdb9,w']
# root="/dev/dsk/c0d0s0"
vif = ['']
on_shutdown = "destroy"
on_reboot = "destroy"
on_crash = "destroy"

[EMAIL PROTECTED] vm]# xm create -c Solaris78.conf
Using config file "./Solaris78.conf".
Started domain Solaris78
Loading kmdb...

Welcome to kmdb
Loaded modules: [ unix krtld genunix ]
[0]> ::bp xdf`xdf_init
[0]> ::cont
v3.1.0-53.el5 chgset 'unavailable'
SunOS Release 5.11 Version snv_78 64-bit
Copyright 1983-2007 Sun Microsystems, Inc.  All rights reserved.
Use is subject to license terms.
Configuring /dev
Loaded modules: [ scsi_vhci crypto neti ptm xpv_psm ufs mpt zfs uhci hook ip 
logindmux usba specfs random sctp arp ]
kmdb: breakpoint xdf`xdf_init activation failed: unknown symbol name
kmdb: target stopped at:
kmt_defbp_enter_debugger:       pushq  %rbp
[0]> xdf_barrier_flush_disable/W 1
xdf`xdf_barrier_flush_disable:  0               =       0x1
[0]> ::cont

NOTICE: [EMAIL PROTECTED]: failed to read feature-barrier
NOTICE: [EMAIL PROTECTED]: failed to read feature-barrier
Solaris Interactive Text (Console session)
Using install cd in /dev/dsk/c0d6p0
Using RPC Bootparams for network configuration information.
Attempting to configure interface xnf0...
Skipped interface xnf0
Reading ZFS config: done.
Setting up Java. Please wait...

. . . . . . . . . . . . . . . . . . . .

The summery below is your current file system and disk layout, based on the
  information you've supplied.

  NOTE: If you choose to customize, you should understand file systems, their
  intended purpose on the disk, and how changing them may affect the operation
  of the system.

      File sys/Mnt point Disk/Slice                                       Size
      ===================================================================
      / c0d-25243072s0                              5985    MB
      swap     c0d-25243072s1                     517     MB
      overlap  c0d-25243072s2                     15664   MB
      /export/home   c0d-25243072s7               9154    MB
====================================================================
 
 
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