Migrated a CentOS 6.7 Linux VM to GCE and it won't boot - similar migrations worked OK

[Alexander Verharen]

Used CloudEndure to migrate CentOS linux host and tried several times to migrate it, but it won't boot.

I am getting the following error (full log attached). 

rtc_cmos 00:01: setting system clock to 2017-06-11 05:33:18 UTC (1497159198)
Initalizing network drop monitor service
input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input3
input: ImPS/2 Generic Wheel Mouse as /devices/platform/i8042/serio1/input/input4
md: Waiting for all devices to be available before autodetect
md: If you don't use raid, use raid=noautodetect
md: Autodetecting RAID arrays.
md: Scanned 0 and added 0 devices.
md: autorun ...
md: ... autorun DONE.
RAMDISK: gzip image found at block 0
RAMDISK: incomplete write (4472 != 15380)
write error
VFS: Cannot open root device "UUID=bf4548e3-83c6-4661-9868-89e071376723" or unknown-block(0,0)
Please append a correct "root=" boot option; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
Pid: 1, comm: swapper Tainted: G        W  ---------------    2.6.32-504.23.4.el6.x86_64 #1

What could be the problem here and how can I prevent this sort of problem during my migrations?

[Brian Stark]

Adding Leonid from CloudEndure to see if he can comment

Brian Stark |

Product, Google Cloud Platform |

bhs...@google.com |

+1 (415) 298-7808

 

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[Irina (Google Cloud Support)]

Found this post on how to fix the error “VFS: Unable to mount root fs on unknown-block” on CentOS Linux that might or might not help you to boot your instance. It says that running ‘sudo yum update kernel’ resolves the issue. Add a custom metadata on your Compute Engine VM instances with the key ‘startup-script’ and value ‘sudo yum update kernel’. Save the changes and restart the instance.