Re: [Xen-users] CentOS 5.1 and Xen - mount: could not find filesystem '/dev/root'

[Erich Weiler <weiler@xxxxxxxxxxxx>]

Here's the output from the domain creation command if anyone can see 
anything blaringly wrong with it...
[root@xenserver xen]# xm create -c tcga1 vmid=1
Using config file "./tcga1".
Started domain tcga1
Bootdata ok (command line is  root=/dev/xvda1 ro selinux=0 3)
Linux version 2.6.18-53.1.4.el5xen (mockbuild@xxxxxxxxxxxxxxxxxxx) (gcc 
version 4.1.2 20070626 (Red Hat 4.1.2-14)) #1 SMP Fri Nov 30 01:21:23 
EST 2007
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000100800000 (usable)
No mptable found.
Built 1 zonelists.  Total pages: 1050624
Kernel command line:  root=/dev/xvda1 ro selinux=0 3
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 32768 bytes)
Xen reported: 2599.996 MHz processor.
Console: colour dummy device 80x25
Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes)
Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes)
Software IO TLB disabled
Memory: 4096000k/4202496k available (2357k kernel code, 97564k reserved, 
1326k data, 172k init)
Calibrating delay using timer specific routine.. 6502.41 BogoMIPS 
(lpj=13004823)
Security Framework v1.0.0 initialized
SELinux:  Disabled at boot.
Capability LSM initialized
Mount-cache hash table entries: 256
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 1024K (64 bytes/line)
CPU: Physical Processor ID: 1
CPU: Processor Core ID: 1
(SMP-)alternatives turned off
Brought up 1 CPUs
checking if image is initramfs... it is
Grant table initialized
NET: Registered protocol family 16
ACPI Exception (utmutex-0262): AE_BAD_PARAMETER, Thread 10347A0 could 
not acquire Mutex [2] [20060707]
ACPI Exception (utmutex-0262): AE_BAD_PARAMETER, Thread 10347A0 could 
not acquire Mutex [2] [20060707]
Initializing CPU#1
migration_cost=1048
Brought up 2 CPUs
PCI: setting up Xen PCI frontend stub
ACPI: Interpreter disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI: disabled
xen_mem: Initialising balloon driver.
usbcore: registered new driver usbfs
usbcore: registered new driver hub
PCI: System does not support PCI
PCI: System does not support PCI
NetLabel: Initializing
NetLabel:  domain hash size = 128
NetLabel:  protocols = UNLABELED CIPSOv4
NetLabel:  unlabeled traffic allowed by default
NET: Registered protocol family 2
IP route cache hash table entries: 262144 (order: 9, 2097152 bytes)
TCP established hash table entries: 262144 (order: 10, 4194304 bytes)
TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
TCP: Hash tables configured (established 262144 bind 65536)
TCP reno registered
audit: initializing netlink socket (disabled)
audit(1197675755.350:1): initialized
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
Initializing Cryptographic API
ksign: Installing public key data
Loading keyring
- Added public key BF23BF4D1917253
- User ID: CentOS (Kernel Module GPG key)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
rtc: IRQ 8 is not free.
Non-volatile memory driver v1.2
Linux agpgart interface v0.101 (c) Dave Jones
RAMDISK driver initialized: 16 RAM disks of 16384K size 4096 blocksize
Xen virtual console successfully installed as xvc0
Bootdata ok (command line is  root=/dev/xvda1 ro selinux=0 3)
Linux version 2.6.18-53.1.4.el5xen (mockbuild@xxxxxxxxxxxxxxxxxxx) (gcc 
version 4.1.2 20070626 (Red Hat 4.1.2-14)) #1 SMP Fri Nov 30 01:21:23 
EST 2007
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000100800000 (usable)
No mptable found.
Built 1 zonelists.  Total pages: 1050624
Kernel command line:  root=/dev/xvda1 ro selinux=0 3
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 32768 bytes)
Xen reported: 2599.996 MHz processor.
Console: colour dummy device 80x25
Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes)
Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes)
Software IO TLB disabled
Memory: 4096000k/4202496k available (2357k kernel code, 97564k reserved, 
1326k data, 172k init)
Calibrating delay using timer specific routine.. 6502.41 BogoMIPS 
(lpj=13004823)
Security Framework v1.0.0 initialized
SELinux:  Disabled at boot.
Capability LSM initialized
Mount-cache hash table entries: 256
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 1024K (64 bytes/line)
CPU: Physical Processor ID: 1
CPU: Processor Core ID: 1
(SMP-)alternatives turned off
Brought up 1 CPUs
checking if image is initramfs... it is
Grant table initialized
NET: Registered protocol family 16
ACPI Exception (utmutex-0262): AE_BAD_PARAMETER, Thread 10347A0 could 
not acquire Mutex [2] [20060707]
ACPI Exception (utmutex-0262): AE_BAD_PARAMETER, Thread 10347A0 could 
not acquire Mutex [2] [20060707]
Initializing CPU#1
migration_cost=1048
Brought up 2 CPUs
PCI: setting up Xen PCI frontend stub
ACPI: Interpreter disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI: disabled
xen_mem: Initialising balloon driver.
usbcore: registered new driver usbfs
usbcore: registered new driver hub
PCI: System does not support PCI
PCI: System does not support PCI
NetLabel: Initializing
NetLabel:  domain hash size = 128
NetLabel:  protocols = UNLABELED CIPSOv4
NetLabel:  unlabeled traffic allowed by default
NET: Registered protocol family 2
IP route cache hash table entries: 262144 (order: 9, 2097152 bytes)
TCP established hash table entries: 262144 (order: 10, 4194304 bytes)
TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
TCP: Hash tables configured (established 262144 bind 65536)
TCP reno registered
audit: initializing netlink socket (disabled)
audit(1197675755.350:1): initialized
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
Initializing Cryptographic API
ksign: Installing public key data
Loading keyring
- Added public key BF23BF4D1917253
- User ID: CentOS (Kernel Module GPG key)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
rtc: IRQ 8 is not free.
Non-volatile memory driver v1.2
Linux agpgart interface v0.101 (c) Dave Jones
RAMDISK driver initialized: 16 RAM disks of 16384K size 4096 blocksize
Xen virtual console successfully installed as xvc0
Event-channel device installed.
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
ide-floppy driver 0.99.newide
usbcore: registered new driver hiddev
usbcore: registered new driver usbhid
drivers/usb/input/hid-core.c: v2.6:USB HID core driver
PNP: No PS/2 controller found. Probing ports directly.
i8042.c: No controller found.
mice: PS/2 mouse device common for all mice
md: md driver 0.90.3 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: bitmap version 4.39
TCP bic registered
Initializing IPsec netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
XENBUS: Device with no driver: device/vbd/51715
XENBUS: Device with no driver: device/vif/0
Write protecting the kernel read-only data: 445k
Red Hat nash version 5.1.19.6 starting
Mounting proc filesystem
Mounting sysfs filesystem
Creating /dev
Creating initial device nodes
Setting up hotplug.
Creating block device nodes.
Loading uhci-hcd.ko module
USB Universal Host Controller Interface driver v3.0
Loading ohci-hcd.ko module
Loading ehci-hcd.ko module
Loading jbd.ko module
Loading ext3.ko module
Loading scsi_mod.ko module
SCSI subsystem initialized
Loading sd_mod.ko module
Loading 3w-9xxx.ko module
3ware 9000 Storage Controller device driver for Linux v2.26.02.008.
Loading libata.ko module
Loading sata_nv.ko module
Waiting for driver initialization.
Scanning and configuring dmraid supported devices
Creating root device.
Mounting root filesystem.
mount: could not find filesystem '/dev/root'
Setting up other filesystems.
Setting up new root fs
setuproot: moving /dev failed: No such file or directory
no fstab.sys, mounting internal defaults
setuproot: error mounting /proc: No such file or directory
setuproot: error mounting /sys: No such file or directory
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys
switchroot: mount failed: No such file or directory
Kernel panic - not syncing: Attempted to kill init!
[root@xenserver xen]#

I just know something can be done I just don't know what...  :(

-erich

Erich Weiler wrote:
> > Did you change sdax in disk = section to xvdax? Did you change root = 
> > to from /dev/sda1 ro to /dev/xvda1?
> > Did you change the /etc/fstab of the guest accordingly?
> I just tried that, changed sdax to xvdax in the config file and in the 
> fstab file, still get the same error...
> Thanks for replying!
>
> -some_guy
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