| Thanks, I tried your suggestion, the results are the same.  The 
system seems to be unable to find the IDE devices, I am using LVM 
devices IDE 
device = hde,  60Gb hd primary partition  = hde1 , volume group = vg, logical volume = 
/dev/vg/lvm1 which is a pointer to /dev/mapper/vg-lvm1 When 
the /dev/vg/lvm1 device is mounted the Xencommand " xm 
create -c vm01.cfg"  produces the following 
error:   #    'local': the device may not be used because it is 
mounted in the 
current#             
(i.e. the privileged domain) in a way incompatible with 
the
 #             
requested mode;
   This 
error is produced by /etc/xen/scripts/block. When 
unmounted the following is shown on the screen:   [root@rhfc401 /]# xm create -c vm01.cfgUsing config file 
"/etc/xen/vm01.cfg".
 Started domain vm01
 Linux version 
2.6.12.6-xen3_7.1_fc4 (rread@shandlx) (gcc version 4.0.1 
20050727 (Red Hat 4.0.1-5)) #1 SMP Tue Dec 13 16:33:43 PST 2005
 BIOS-provided 
physical RAM map:
 Xen: 0000000000000000 - 000000001c000000 
(usable)
 0MB HIGHMEM available.
 456MB LOWMEM available.
 ACPI in 
unprivileged domain disabled
 IRQ lockup detection disabled
 Built 1 
zonelists
 Kernel command line:  ip=:1.2.3.4::::eth0:dhcp root=/dev/sda1 
ro selinux=0 3
 Initializing CPU#0
 PID hash table entries: 2048 (order: 11, 
32768 bytes)
 Xen reported: 2171.584 MHz processor.
 Dentry cache hash table 
entries: 65536 (order: 6, 262144 bytes)
 Inode-cache hash table entries: 32768 
(order: 5, 131072 bytes)
 Software IO TLB disabled
 vmalloc area: 
dd000000-fb7fe000, maxmem 34000000
 Memory: 449664k/466944k available (2214k 
kernel code, 8876k reserved, 885k data, 188k init, 0k highmem)
 Checking if 
this processor honours the WP bit even in supervisor mode... Ok.
 Security 
Framework v1.0.0 initialized
 SELinux:  Disabled at boot.
 Capability 
LSM initialized
 Mount-cache hash table entries: 512
 CPU: L1 I Cache: 64K 
(64 bytes/line), D cache 64K (64 bytes/line)
 CPU: L2 Cache: 256K (64 
bytes/line)
 Enabling fast FPU save and restore... done.
 Enabling unmasked 
SIMD FPU exception support... done.
 Checking 'hlt' instruction... 
disabled
 Brought up 1 CPUs
 NET: Registered protocol family 16
 Brought 
up 1 CPUs
 ACPI: Subsystem revision 20050309
 ACPI: Interpreter 
disabled.
 Linux Plug and Play Support v0.97 (c) Adam Belay
 xen_mem: 
Initialising balloon driver.
 usbcore: registered new driver usbfs
 usbcore: 
registered new driver hub
 PCI: Using ACPI for IRQ routing
 PCI: If a device 
doesn't work, try "pci=routeirq".  If it helps, post a report
 PCI: 
System does not support PCI
 PCI: System does not support PCI
 Grant table 
initialized
 IA-32 Microcode Update Driver: v1.14-xen <tigran@xxxxxxxxxxx>
 VFS: Disk 
quotas dquot_6.5.1
 Dquot-cache hash table entries: 1024 (order 0, 4096 
bytes)
 Initializing Cryptographic API
 isapnp: Scanning for PnP 
cards...
 isapnp: No Plug & Play device found
 PNP: No PS/2 controller 
found. Probing ports directly.
 i8042.c: No controller found.
 io scheduler 
noop registered
 io scheduler anticipatory registered
 io scheduler deadline 
registered
 io scheduler cfq registered
 RAMDISK driver initialized: 16 RAM 
disks of 16384K size 1024 blocksize
 Xen virtual console successfully 
installed as tty1
 Event-channel device installed.
 netfront: Initialising 
virtual ethernet driver.
 Uniform Multi-Platform E-IDE driver Revision: 
7.00alpha2
 ide: Assuming 50MHz system bus speed for PIO modes; override with 
idebus=xx
 Registering block device major 0
 xen_blk: can't get major 0 with 
name xvd
 Unable to handle kernel NULL pointer dereference at virtual address 
00000104
 printing eip:
 c023f2f9
 *pde = ma 00000000 pa 
55555000
 Oops: 0002 [#1]
 SMP
 Modules linked 
in:
 CPU:    0
 EIP:    
0061:[<c023f2f9>]    Not tainted VLI
 EFLAGS: 
00010086   (2.6.12.6-xen3_7.1_fc4)
 EIP is at 
blk_start_queue+0x9/0x50
 eax: 00000000   ebx: 00000000   
ecx: fbf7d000   edx: 00000000
 esi: c04f5da0   edi: 
c04b4000   ebp: c04b5f9c   esp: c04b5f30
 ds: 
007b   es: 007b   ss: 0069
 Process xenwatch (pid: 7, 
threadinfo=c04b4000 task=c1442a80)
 Stack: 00000004 c05ca000 c0258000 00000000 
c05ca000 c0257f19 c05ca000 00000000
 00000004 00000000 00000200 c05ca000 c034e6dd c04b5f78 c03566b4 
c034bc96
 c04b5f7c 00000000 00000000 
00000200 01b00000 c0252280 c02514f7 c05ca000
 Call 
Trace:
 [<c0258000>] 
kick_pending_request_queues+0x20/0x40
 [<c0257f19>] 
connect+0xe9/0x130
 [<c0252280>] 
otherend_changed+0x0/0xa0
 [<c02514f7>] 
xenwatch_thread+0x87/0x140
 [<c013ba10>] 
autoremove_wake_function+0x0/0x60
 [<c0251470>] 
xenwatch_thread+0x0/0x140
 [<c013b4f8>] 
kthread+0xc8/0xd0
 [<c013b430>] 
kthread+0x0/0xd0
 [<c0107c3d>] 
kernel_thread_helper+0x5/0x18
 Code: 00 00 8b 44 24 04 8b 48 60 ff e1 8d b4 26 
00 00 00 00 81 44 24 04 a0 00 00 00 e9 e3 27 00 00 8d 76 00 53 83 ec 04 8b 5c 24 
0c 90 <0f> ba b3 04 01 00 00 02 90 0f ba ab 04 01 00 00 06 19 c0 85 
c0
 <7>Probing IDE interface ide0...
 Probing IDE interface 
ide1...
 Probing IDE interface ide2...
 Probing IDE interface 
ide3...
 Probing IDE interface ide4...
 Probing IDE interface 
ide5...
 ide-floppy driver 0.99.newide
 mice: PS/2 mouse device common for 
all mice
 NET: Registered protocol family 2
 IP: routing cache hash table of 
4096 buckets, 32Kbytes
 TCP established hash table entries: 16384 (order: 5, 
131072 bytes)
 TCP bind hash table entries: 16384 (order: 5, 131072 
bytes)
 TCP: Hash tables configured (established 16384 bind 16384)
 NET: 
Registered protocol family 8
 NET: Registered protocol family 20
 VFS: 
Cannot open root device "sda1" or unknown-block(0,0)
 Please append a correct 
"root=" boot option
 Kernel panic - not syncing: VFS: Unable to mount root fs 
on unknown-block(0,0)
 
 
  
  
  
  I’m only a newbie 
  myself but try changing disk = [ 'phy:/dev/vg/lvm1,sda1,w' 
  ] to disk = [ 'phy:vg/lvm1,sda1,w' 
  ]   CC   
  
  
 From: James 
  [mailto:seven@xxxxxxxx] Sent: Friday, 30 December 2005 11:29 
  AM
 To: 
  xen-users@xxxxxxxxxxxxxxxxxxx
 Subject: [Xen-users] Xen 3.0 domain 
  creation issues on fc4
   
  I made some modifications after 
  reading the list messages in my e-mail box. I am now getting the following 
  error: 
  [2005-12-29 20:05:12 xend] DEBUG (blkif:24) exception 
  looking up device number for sda1: [Errno 2] No such file or directory: 
  '/dev/sda1' I also 
  get an error on the screen that /dev/sda1 or /mnt/sda1does not exist and I 
  need to properly specify the boot parameter. 
  I get this error when I attempt to 
  use /dev/sda1 or /mnt/sda1; the LVM partition will mount successfully with a 
  mount command.  I moved it to /mnt/sda1 because the os deletes /dev/sda1 
  on reboot and I have to recreate it with a mkdir command.  When I mount 
  the /mnt/sda1 device and run "xm create -c vm01.cfg" I get an error that the 
  domain cannot mount because the device is in use. 
  FSTAB on the vm01 file 
  system 
  /mnt/sda1             
  / ext3             
  defaults 1 1 none                    /dev/pts          
  devpts gid=5,mode=620 0 0 none                    /dev/shm        tmpfs 
  defaults 0 0 none                    /proc 
  proc      defaults 0 0 none                    /sys 
  sysfs       defaults 0 0   vm01.cfg used to start the 
  domain kernel = 
  "/boot/vmlinuz-2.6.12.6-xen3_7.1_fc4" memory = 448 name = "vm01" nics = 1 disk = [ 'phy:/dev/vg/lvm1,sda1,w' 
  ] dhcp = "dhcp" root = 
  "/mnt/sda1" extra = "ro selinux=0 
  3 
 
 
    
    
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