[SOLVED] UEFI doesn't "see" the 'EFI System' partition

My BIOS/UEFI stop from "see" the 'EFI System' partition, there's shellx64.efi and a gummiboot installation and when I try to launch the shell only get "Not found" message.
Here's the GPT:
$ sudo gdisk -l /dev/sda
GPT fdisk (gdisk) version 0.8.10
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Disk /dev/sda: 625142448 sectors, 298.1 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 8700C28A-71B0-416A-971A-DDAD1961D56E
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 625142414
Partitions will be aligned on 2048-sector boundaries
Total free space is 2669 sectors (1.3 MiB)
Number Start (sector) End (sector) Size Code Name
1 2048 1640447 800.0 MiB EF00 EFI System
2 1640448 78815231 36.8 GiB 0700 Basic data partition
4 111316992 251867135 67.0 GiB 8300 Linux filesystem
5 251867136 253968383 1.0 GiB 8200
6 253968384 625141759 177.0 GiB 0700 Microsoft basic data
7 78815232 111316991 15.5 GiB 8300
File list:
$ ls /mnt/boot/efi
bootx64.efi EFI loader shellx64.efi
This happened after a unsuccessfully fedora's bootloader installation.
Last edited by hotvic (2015-02-23 00:34:34)

I finally managed out what is the problem.
The problem is that Fedora Installer (anaconda) wrote the MBR code to disk. so the UEFI partition isn't read by BIOS (I think, not sure).
The solution for me was erase the protective-MBR:
# dd if=/dev/zero of=/dev/sda bs=512 count=1
and then fix the GPT:
# gdisk /dev/sda
## just type 'w' and confirm
after that reinstalled the gummiboot and voila
Thanks to all and sorry my very bad english.

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Be sure to make a backup first because the following procedure will erase
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Sorry, but I could not change the headline in the thread were I started this issue. But error 0x807800C5 is too imprecise
https://social.technet.microsoft.com/Forums/windowsserver/en-US/79a735c1-4c50-4fa8-a945-46e25991eea9/wbadmin-failure-0x807800c5?forum=windowsbackup#47e77a02-ddb0-42dd-b33d-1475471f7bc3
So I sumarize the case:
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Up2Date 3/18/15
After weeks of succesfull backups wbadmin suddenly fails with 0x807800C5. No changes were made to the system, same backup device.
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I run wbadmin from a script with:
wbadmin.exe start backup -quiet -backupTarget:f:\ -vssFull -allCritical -hyperv:vm1,vm2,vm3
Output is:
2015-03-18 23:02:17 INF > wbadmin 1.0 - Backup command-line tool
2015-03-18 23:02:17 INF > The backup operation to F: is starting.
2015-03-18 23:02:17 INF > Creating a shadow copy of the volumes specified for backup...
2015-03-18 23:02:17 INF > Creating a shadow copy of the volumes specified for backup...
2015-03-18 23:02:17 INF > Windows Server Backup is updating the existing backup to remove files that have
2015-03-18 23:02:17 INF > been deleted from your server since the last backup.
2015-03-18 23:02:17 INF > This might take a few minutes.
2015-03-18 23:02:17 INF > Creating a backup of volume (EFI System Partition) (100.00 MB), copied (0%).
2015-03-18 23:02:17 INF > Summary of the backup operation:
2015-03-18 23:02:17 INF > ------------------
2015-03-18 23:02:17 INF >
2015-03-18 23:02:17 INF > The backup operation stopped before completing.
2015-03-18 23:02:17 INF > The backup operation stopped before completing.
2015-03-18 23:02:17 INF > Detailed error: The specified backup disk cannot be found.
I found out that the failure only occurs if I add the -allCritical switch.
If I start the backup for drive c: with this command:
wbadmin.exe start backup -quiet -backupTarget:f:\ -include:C: -vssFull -exclude:c:\Hyper-V
everything is ok.
I can backup every virtual machine with the following command without any problem
wbadmin.exe start backup -quiet -backupTarget:f:\ -vssFull -hyperv:XYZ-DOM
Only this command fails:
wbadmin.exe start backup -quiet -backupTarget:f:\ -vssFull -allCritical
The difference is that wbadmin now tries to backup ALL partitions, also EFI & Co. So I assume that wbadmin does not have proper access to the "EFI System Partition" and that all information which one can find in the logs of the
2012 server related to that event is bullshit (Error: The specified backup disk cannot be found).
I found reports of 8.1 users rleated to similar problems (http://answers.microsoft.com/de-de/windows/forum/windows8_1-files/systemabbildsicherung-bricht-ab/f6ed5e53-829e-48be-9b47-a73f730680cc?page=1&tm=1384095732725). Could be a hint, same kernel.
But at the end: With this kind of backup you'll loose defintly the possibility of an bare-metal restore, very
unsatisfying.
Annother question: Backups with the -hyperv switch are terrible slow. The backups are written to an USB-3 disk, The xyz-Dom machine for example has two vhdx files with roundabout 700GB, more or less 350GB filled. The backup needs 12 hours!
Thank you
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Sorry, but I could not change the headline in the thread were I started this issue. But error 0x807800C5 is too imprecise
https://social.technet.microsoft.com/Forums/windowsserver/en-US/79a735c1-4c50-4fa8-a945-46e25991eea9/wbadmin-failure-0x807800c5?forum=windowsbackup#47e77a02-ddb0-42dd-b33d-1475471f7bc3
So I sumarize the case:
Server 2012R2
Hypervisor with several running VM's
Up2Date 3/18/15
After weeks of succesfull backups wbadmin suddenly fails with 0x807800C5. No changes were made to the system, same backup device.
I restored a file and a VM succesfully from the backup to verify that the disk and the image is ok.
I run wbadmin from a script with:
wbadmin.exe start backup -quiet -backupTarget:f:\ -vssFull -allCritical -hyperv:vm1,vm2,vm3
Output is:
2015-03-18 23:02:17 INF > wbadmin 1.0 - Backup command-line tool
2015-03-18 23:02:17 INF > The backup operation to F: is starting.
2015-03-18 23:02:17 INF > Creating a shadow copy of the volumes specified for backup...
2015-03-18 23:02:17 INF > Creating a shadow copy of the volumes specified for backup...
2015-03-18 23:02:17 INF > Windows Server Backup is updating the existing backup to remove files that have
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2015-03-18 23:02:17 INF > This might take a few minutes.
2015-03-18 23:02:17 INF > Creating a backup of volume (EFI System Partition) (100.00 MB), copied (0%).
2015-03-18 23:02:17 INF > Summary of the backup operation:
2015-03-18 23:02:17 INF > ------------------
2015-03-18 23:02:17 INF >
2015-03-18 23:02:17 INF > The backup operation stopped before completing.
2015-03-18 23:02:17 INF > The backup operation stopped before completing.
2015-03-18 23:02:17 INF > Detailed error: The specified backup disk cannot be found.
I found out that the failure only occurs if I add the -allCritical switch.
If I start the backup for drive c: with this command:
wbadmin.exe start backup -quiet -backupTarget:f:\ -include:C: -vssFull -exclude:c:\Hyper-V
everything is ok.
I can backup every virtual machine with the following command without any problem
wbadmin.exe start backup -quiet -backupTarget:f:\ -vssFull -hyperv:XYZ-DOM
Only this command fails:
wbadmin.exe start backup -quiet -backupTarget:f:\ -vssFull -allCritical
The difference is that wbadmin now tries to backup ALL partitions, also EFI & Co. So I assume that wbadmin does not have proper access to the "EFI System Partition" and that all information which one can find in the logs of the
2012 server related to that event is bullshit (Error: The specified backup disk cannot be found).
I found reports of 8.1 users rleated to similar problems (http://answers.microsoft.com/de-de/windows/forum/windows8_1-files/systemabbildsicherung-bricht-ab/f6ed5e53-829e-48be-9b47-a73f730680cc?page=1&tm=1384095732725). Could be a hint, same kernel.
But at the end: With this kind of backup you'll loose defintly the possibility of an bare-metal restore, very
unsatisfying.
Annother question: Backups with the -hyperv switch are terrible slow. The backups are written to an USB-3 disk, The xyz-Dom machine for example has two vhdx files with roundabout 700GB, more or less 350GB filled. The backup needs 12 hours!
Thank you
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[SOLVED] UEFI doesn't "see" the 'EFI System' partition

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