Cannot mount root - Panic

Hi Guys,
I just tried to reboot my server, but it seems to be panicing and unable to mount the root disk.
The filesystem is supposed to be ufs, so im not sure why its talking about vfs.
At the moment it's just stuck in a loop of Reboot-panic-reboot.

Any ideas?
A.

SunOS Release 5.10 Version Generic_147441-12 64-bit                             
Copyright (c) 1983, 2012, Oracle and/or its affiliates. All rights reserved.    
NOTICE: mount: not a UFS magic number (0x74736f50)                              
Cannot mount root on /pci@0,0/pci8086,340a@3/pci1000,3050@0/iport@ff/disk@w5000cca025a257d5,0:a fstype ufs                                                                  
                                                                                
panic[cpu0]/thread=fffffffffbc283c0: vfs_mountroot: cannot mount root           
                                                                                
fffffffffbc6ad90 genunix:vfs_mountroot+2a2 ()                                   
fffffffffbc6add0 genunix:main+11d ()                                            
fffffffffbc6ade0 unix:_start+9d ()                                              
                                                                                
ereport.io.pci.fabric ena=22f65d3abb00001 detector=[ version=0 scheme="dev"     
 device-path="/pci@0,0/pci8086,340a@3" ] bdf=18 device_id=340a vendor_id=8086   
 rev_id=22 dev_type=40 pcie_off=90 pcix_off=0 aer_off=100 ecc_ver=0 pci_status= 
 10 pci_command=47 pci_bdg_sec_status=0 pci_bdg_ctrl=3 pcie_status=1            
 pcie_command=27 pcie_dev_cap=8021 pcie_adv_ctl=0 pcie_ue_status=0              
 pcie_ue_mask=100000 pcie_ue_sev=62030 pcie_ue_hdr0=0 pcie_ue_hdr1=0            
 pcie_ue_hdr2=0 pcie_ue_hdr3=0 pcie_ce_status=1 pcie_ce_mask=0 pcie_rp_status=0 
 pcie_rp_control=0 pcie_adv_rp_status=3 pcie_adv_rp_command=7                   
 pcie_adv_rp_ce_src_id=18 pcie_adv_rp_ue_src_id=0 remainder=0 severity=1        
                                                                                
ereport.io.pci.fabric ena=22f65dc6b700001 detector=[ version=0 scheme="dev"    
 device-path="/pci@0,0/pci8086,340a@3" ] bdf=18 device_id=340a vendor_id=8086
 rev_id=22 dev_type=40 pcie_off=90 pcix_off=0 aer_off=100 ecc_ver=0 pci_status=
 10 pci_command=47 pci_bdg_sec_status=0 pci_bdg_ctrl=3 pcie_status=0
 pcie_command=27 pcie_dev_cap=8021 pcie_adv_ctl=0 pcie_ue_status=0
 pcie_ue_mask=100000 pcie_ue_sev=62030 pcie_ue_hdr0=0 pcie_ue_hdr1=0
 pcie_ue_hdr2=0 pcie_ue_hdr3=0 pcie_ce_status=0 pcie_ce_mask=0 pcie_rp_status=0
 pcie_rp_control=0 pcie_adv_rp_status=0 pcie_adv_rp_command=7
 pcie_adv_rp_ce_src_id=18 pcie_adv_rp_ue_src_id=0 remainder=0 severity=1
-> 
skipping system dump - no dump device configured
rebooting...

Boot the system into single user from CD

 
boot cdrom -s

fsck your hard disk root filesystem. Then try mounting it under /a and see what it looks like.