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如何在 Linux 上调整 GPT 分区表本身的大小？

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如何在 Linux 上调整 GPT 分区表本身的大小？

我已使用dd.

但GPT的大小仍然是1GB。例如，辅助（备份）GPT 仍然位于 1GB（必须移至磁盘末尾）。

我也觉得两个字段主 GPT 内部（偏移量 32 和 48）必须更新。

我已经调查过gdisk但找不到任何东西。

答案1

使用示例gdisk：

# gdisk /dev/yourdisk
Command (? for help): v

Problem: The secondary header's self-pointer indicates that it doesn't reside
at the end of the disk. If you've added a disk to a RAID array, use the 'e'
option on the experts' menu to adjust the secondary header's and partition
table's locations.

Identified 1 problems!

gdiskx使用起来可能有点神秘，但它在这里通过专家菜单（ ， ）直接告诉您如何解决此问题e。

Command (? for help): x

Expert command (? for help): ?
e   relocate backup data structures to the end of the disk

Expert command (? for help): e
Relocating backup data structures to the end of the disk

此时你可以调整分区或者直接写出来：

Expert command (? for help): v

No problems found. 15624933 free sectors (7.5 GiB) available in 1
segments, the largest of which is 15624933 (7.5 GiB) in size.

Expert command (? for help): w

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!

Do you want to proceed? (Y/N): Y
OK; writing new GUID partition table (GPT) to /dev/yourdisk.

parted也可以使用，当你使用任何命令时它都会要求你修复它：

# parted /dev/yourdisk print
Warning: Not all of the space available to /dev/yourdisk appears to be used, 
you can fix the GPT to use all of the space (an extra 13671875 blocks)
or continue with the current setting?
Fix/Ignore?

fdisk将通过写入来调整 GPT 的大小。

# fdisk /dev/yourdisk

Welcome to fdisk (util-linux 2.39.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

GPT PMBR size mismatch (1953124 != 15624999) will be corrected by write.
The backup GPT table is not on the end of the device. This problem will be corrected by write.

Command (m for help): w

The partition table has been altered.
Calling ioctl() to re-read partition table.

答案2

只需写入分区表gdisk即可。w你会看见：

Warning! Secondary header is placed too early on the disk! Do you want to
correct this problem? (Y/N):

说y是。如有必要请再次确认。完毕。

或者使用fdisk.你会看见：

GPT PMBR size mismatch (…) will be corrected by write.
The backup GPT table is not on the end of the device. This problem will be corrected by write.

同样只需w写入分区表即可。完毕。

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