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Lost guest server after cold migration to ESX 3.0.1


After I've done more that a hundred guests server cold migrations to ESX 3.0.1 without any problems, I decided to speed up the conversion by skipping the backup/snapshot process for one server.

So I powered it off fine and cold migration went fine - no errors. Same for virtual hardware upgrade. However my Linux box is not booting and what is worst, when I tried to boot with a recovery CD; with fdisk I can not see any partition table and is complaining about

"invalid flag 0x0000 of partition table 4 will be corrected by w(rite)"

This was a RedHat ES 4 server with BusLogic controller that was cold migrated by relocating its vmdk disk file to an VMFS3 partition.

Have anyone encountered this and can help me to recover this server?

Thank you,


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When you shutdown the VM, the shutdown was orderly?

It appears your VMDK partition table is now gone from the MBR. When you did the code migrate did you use 'Migrate' or 'Clone'?

When you boot from the rescue CDROM do an lsmod and see if the buslogic driver is even loaded. If it is not you will not be able to see the device. Load the buslogic driver and try once more.

Run 'fdisk -l' does the disk show up at all?

Best regards,


Edward L. Haletky
vExpert XIV: 2009-2023,
VMTN Community Moderator
vSphere Upgrade Saga: https://www.astroarch.com/blogs
GitHub Repo: https://github.com/Texiwill
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