Ttgjyuk

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Fixing corrupt backup GPT table?

The primary GPT table is corrupt, but the backup appears OK, so that will be usedtestdisk is showing wrong size of driveExtracting qcow2 image to a smaller real driveUbuntu 16.04 do not boot after installationBoot Ubuntu 18.04 from external hard driveLinux Ubuntu 16.04 Blank ScreenCannot connect HDD with GPT (unrecognised disk label)Unable to recongnize patition table after overwriting the first MB of HD. How can I recover the dataRepair corrupt GPT partition table of OSX disk from LinuxGrub error and failed boot loaderThe partition table is corruptThe backup GPT table is corruptCan't format or delete partitions in pendrive because of GPT table errorCan't restore my gpt data with gdiskHow to fix a corrupted partition table?The CRC for the main partition and back up partition table are invalidgdisk unable to write GPT tableWindows corrupts primary GPT tableAccidentally created new partition table for boot driveHow Do I Dual boot Windows After Ubuntu in Legacy mode GPT paritition Table?

23

5

After successfully installing a dual boot environment, adding Ubuntu 13.10 to a preinstalled Windows 8 configuration I decided to increase the unallocated SSD disk space after reading about the benefits of over-provisioning. So, using miniTools Partition Wizard in Windows, I shrunk the NTFS Windows partition somewhat. That seem to have completed successfully. However, when I boot up Linux and launch GParted, it gives the following error message at startup:

The backup GPT table is corrupt, but the primary appears OK, so that will be used.

Everything seems fine and dandy with the system, but I am worried that I will have a problem should the main GPT table become corrupt for some reason.

I have used gdisk to backup the GPT table to a file, but is there a way to create a new backup GPT table?

partitioning

share|improve this question

edited 37 mins ago

Pablo Bianchi

2,97021535

asked Dec 5 '13 at 22:33

tomoqvtomoqv

2692518

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I would NOT recommend using the MiniTool software (used over the years mostly successfully). I recently attempted to partition an SD Card with the software and wound up with a real annoying GPT Partition Table that needed major fixing (or 5-10 mins of Googling but annoying all the same). Stick with Linux if you can and use either gdisk or fdisk to create your partition table.
  
  – Joe Johnson
  Nov 10 '18 at 15:33
  

  
  
  
  

add a comment | 

23

5

After successfully installing a dual boot environment, adding Ubuntu 13.10 to a preinstalled Windows 8 configuration I decided to increase the unallocated SSD disk space after reading about the benefits of over-provisioning. So, using miniTools Partition Wizard in Windows, I shrunk the NTFS Windows partition somewhat. That seem to have completed successfully. However, when I boot up Linux and launch GParted, it gives the following error message at startup:

The backup GPT table is corrupt, but the primary appears OK, so that will be used.

Everything seems fine and dandy with the system, but I am worried that I will have a problem should the main GPT table become corrupt for some reason.

I have used gdisk to backup the GPT table to a file, but is there a way to create a new backup GPT table?

partitioning

share|improve this question

edited 37 mins ago

Pablo Bianchi

2,97021535

asked Dec 5 '13 at 22:33

tomoqvtomoqv

2692518

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I would NOT recommend using the MiniTool software (used over the years mostly successfully). I recently attempted to partition an SD Card with the software and wound up with a real annoying GPT Partition Table that needed major fixing (or 5-10 mins of Googling but annoying all the same). Stick with Linux if you can and use either gdisk or fdisk to create your partition table.
  
  – Joe Johnson
  Nov 10 '18 at 15:33
  

  
  
  
  

add a comment | 

After successfully installing a dual boot environment, adding Ubuntu 13.10 to a preinstalled Windows 8 configuration I decided to increase the unallocated SSD disk space after reading about the benefits of over-provisioning. So, using miniTools Partition Wizard in Windows, I shrunk the NTFS Windows partition somewhat. That seem to have completed successfully. However, when I boot up Linux and launch GParted, it gives the following error message at startup:

The backup GPT table is corrupt, but the primary appears OK, so that will be used.

Everything seems fine and dandy with the system, but I am worried that I will have a problem should the main GPT table become corrupt for some reason.

I have used gdisk to backup the GPT table to a file, but is there a way to create a new backup GPT table?

partitioning

share|improve this question

edited 37 mins ago

Pablo Bianchi

2,97021535

asked Dec 5 '13 at 22:33

tomoqvtomoqv

2692518

share|improve this question

edited 37 mins ago

Pablo Bianchi

2,97021535

asked Dec 5 '13 at 22:33

tomoqvtomoqv

2692518

share|improve this question

edited 37 mins ago

Pablo Bianchi

2,97021535

asked Dec 5 '13 at 22:33

tomoqvtomoqv

2692518

edited 37 mins ago

Pablo Bianchi

2,97021535

edited 37 mins ago

Pablo Bianchi

2,97021535

asked Dec 5 '13 at 22:33

tomoqvtomoqv

2692518

asked Dec 5 '13 at 22:33

tomoqvtomoqv

2692518

2 Answers
2

active

oldest

votes

36

Use gdisk and verify partitions are correct with p, and use w to write the partition table. If not correct just use q to quit. That should update primary, backup & protective MBR.

sudo gdisk /dev/sda
Command (? for help): 

b back up GPT data to a file
c change a partition's name
d delete a partition
i show detailed information on a partition
l list known partition types
n add a new partition
o create a new empty GUID partition table (GPT)
p print the partition table
q quit without saving changes
r recovery and transformation options (experts only)
s sort partitions
t change a partition's type code
v verify disk
w write table to disk and exit
x extra functionality (experts only)
? print this menu

Be sure to see comment below by Rod Smith, he is author of gdisk.

share|improve this answer

edited 29 mins ago

Pablo Bianchi

2,97021535

answered Dec 6 '13 at 0:46

oldfredoldfred

7,81421421

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Thanks, that fixed the issue! Now to another question, is it possible to merge two separate blocks of unallocated space and in that case, should I?
  
  – tomoqv
  Dec 6 '13 at 7:05
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Note that gdisk also has a v command that should turn up details about most GPT problems. Also, this page describes gdisk's repairing options. As to merging two separate blocks of unallocated space, that's done in GParted or the like by moving intervening partition(s). This is a risky operation, so do it only if necessary. Alternatively, you could create two partitions and use LVM to create a logical volume that would span both partitions, even though they're non-contiguous.
  
  – Rod Smith
  Dec 6 '13 at 18:13
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  CAREFUL - my disks were part of a software raid array. This command changed the partition type from "Linux raid autodetect" to "Linux filesystem" and now my raid array superblocks are missing. (I have a backup).
  
  – barrypicker
  Jan 3 '18 at 18:22
  

  
  
  
  

add a comment | 

0

Not exactly sure, but when I have two disks part of software raid (MDADM) I get this message. I damaged the array trying to remove this message. I was forced to recreate the array, and I still get this message. Since the array works, but I still get this message, I am just going to live with the message instead of trying to remove/fix it.

share|improve this answer

answered Jan 3 '18 at 18:37

barrypickerbarrypicker

4381510

add a comment | 

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36

Use gdisk and verify partitions are correct with p, and use w to write the partition table. If not correct just use q to quit. That should update primary, backup & protective MBR.

sudo gdisk /dev/sda
Command (? for help): 

b back up GPT data to a file
c change a partition's name
d delete a partition
i show detailed information on a partition
l list known partition types
n add a new partition
o create a new empty GUID partition table (GPT)
p print the partition table
q quit without saving changes
r recovery and transformation options (experts only)
s sort partitions
t change a partition's type code
v verify disk
w write table to disk and exit
x extra functionality (experts only)
? print this menu

Be sure to see comment below by Rod Smith, he is author of gdisk.

share|improve this answer

edited 29 mins ago

Pablo Bianchi

2,97021535

answered Dec 6 '13 at 0:46

oldfredoldfred

7,81421421

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Thanks, that fixed the issue! Now to another question, is it possible to merge two separate blocks of unallocated space and in that case, should I?
  
  – tomoqv
  Dec 6 '13 at 7:05
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Note that gdisk also has a v command that should turn up details about most GPT problems. Also, this page describes gdisk's repairing options. As to merging two separate blocks of unallocated space, that's done in GParted or the like by moving intervening partition(s). This is a risky operation, so do it only if necessary. Alternatively, you could create two partitions and use LVM to create a logical volume that would span both partitions, even though they're non-contiguous.
  
  – Rod Smith
  Dec 6 '13 at 18:13
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  CAREFUL - my disks were part of a software raid array. This command changed the partition type from "Linux raid autodetect" to "Linux filesystem" and now my raid array superblocks are missing. (I have a backup).
  
  – barrypicker
  Jan 3 '18 at 18:22
  

  
  
  
  

add a comment | 

36

Use gdisk and verify partitions are correct with p, and use w to write the partition table. If not correct just use q to quit. That should update primary, backup & protective MBR.

sudo gdisk /dev/sda
Command (? for help): 

b back up GPT data to a file
c change a partition's name
d delete a partition
i show detailed information on a partition
l list known partition types
n add a new partition
o create a new empty GUID partition table (GPT)
p print the partition table
q quit without saving changes
r recovery and transformation options (experts only)
s sort partitions
t change a partition's type code
v verify disk
w write table to disk and exit
x extra functionality (experts only)
? print this menu

Be sure to see comment below by Rod Smith, he is author of gdisk.

share|improve this answer

edited 29 mins ago

Pablo Bianchi

2,97021535

answered Dec 6 '13 at 0:46

oldfredoldfred

7,81421421

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Thanks, that fixed the issue! Now to another question, is it possible to merge two separate blocks of unallocated space and in that case, should I?
  
  – tomoqv
  Dec 6 '13 at 7:05
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Note that gdisk also has a v command that should turn up details about most GPT problems. Also, this page describes gdisk's repairing options. As to merging two separate blocks of unallocated space, that's done in GParted or the like by moving intervening partition(s). This is a risky operation, so do it only if necessary. Alternatively, you could create two partitions and use LVM to create a logical volume that would span both partitions, even though they're non-contiguous.
  
  – Rod Smith
  Dec 6 '13 at 18:13
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  CAREFUL - my disks were part of a software raid array. This command changed the partition type from "Linux raid autodetect" to "Linux filesystem" and now my raid array superblocks are missing. (I have a backup).
  
  – barrypicker
  Jan 3 '18 at 18:22
  

  
  
  
  

add a comment | 

Use gdisk and verify partitions are correct with p, and use w to write the partition table. If not correct just use q to quit. That should update primary, backup & protective MBR.

sudo gdisk /dev/sda
Command (? for help): 

b back up GPT data to a file
c change a partition's name
d delete a partition
i show detailed information on a partition
l list known partition types
n add a new partition
o create a new empty GUID partition table (GPT)
p print the partition table
q quit without saving changes
r recovery and transformation options (experts only)
s sort partitions
t change a partition's type code
v verify disk
w write table to disk and exit
x extra functionality (experts only)
? print this menu

Be sure to see comment below by Rod Smith, he is author of gdisk.

share|improve this answer

edited 29 mins ago

Pablo Bianchi

2,97021535

answered Dec 6 '13 at 0:46

oldfredoldfred

7,81421421

sudo gdisk /dev/sda
Command (? for help): 

share|improve this answer

edited 29 mins ago

Pablo Bianchi

2,97021535

answered Dec 6 '13 at 0:46

oldfredoldfred

7,81421421

edited 29 mins ago

Pablo Bianchi

2,97021535

edited 29 mins ago

Pablo Bianchi

2,97021535

answered Dec 6 '13 at 0:46

oldfredoldfred

7,81421421

answered Dec 6 '13 at 0:46

oldfredoldfred

7,81421421

0

Not exactly sure, but when I have two disks part of software raid (MDADM) I get this message. I damaged the array trying to remove this message. I was forced to recreate the array, and I still get this message. Since the array works, but I still get this message, I am just going to live with the message instead of trying to remove/fix it.

share|improve this answer

answered Jan 3 '18 at 18:37

barrypickerbarrypicker

4381510

add a comment | 

0

Not exactly sure, but when I have two disks part of software raid (MDADM) I get this message. I damaged the array trying to remove this message. I was forced to recreate the array, and I still get this message. Since the array works, but I still get this message, I am just going to live with the message instead of trying to remove/fix it.

share|improve this answer

answered Jan 3 '18 at 18:37

barrypickerbarrypicker

4381510

add a comment | 

Not exactly sure, but when I have two disks part of software raid (MDADM) I get this message. I damaged the array trying to remove this message. I was forced to recreate the array, and I still get this message. Since the array works, but I still get this message, I am just going to live with the message instead of trying to remove/fix it.

share|improve this answer

answered Jan 3 '18 at 18:37

barrypickerbarrypicker

4381510

share|improve this answer

answered Jan 3 '18 at 18:37

barrypickerbarrypicker

4381510

answered Jan 3 '18 at 18:37

barrypickerbarrypicker

4381510

answered Jan 3 '18 at 18:37

barrypickerbarrypicker

4381510