Invalid GPT backup header
wblock at wonkity.com
Tue Jul 10 00:49:19 UTC 2012
On Mon, 9 Jul 2012, dweimer wrote:
> I have had a few virtual machine installations come up with "gptboot: invalid
> GPT backup header" error message while booting. (some immediately on first
> boot after install) They still boot fine, and run without problems, but I
> would like to find a way to fix the problem. Does anyone know how you can
> write a new GPT backup header to the partition table.
See the gpart recover command covered in the RECOVERING section in
> I have even gone to the extent of adding a second virtual disk, using
> gpart to create a partition table and then add new partitions and
> setup bootstrap then use cpio to copy data over and switched the drive
> SCSI IDs within the virtual machines configuration to boot from the
> second drive instead. Still same error message when booting off the
> new drive. I did however leave out the size option when creating the
> last UFS partition so it may have filled to the end and overwrote the
> backup GPT table.
gpart will not overwrite the backup GPT with a partition. Other stuff
may not be GPT-aware.
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