修復 graid 迷你磁碟上損壞的 GPT 分割區

修復 graid 迷你磁碟上損壞的 GPT 分割區

我正在嘗試修復 graid mini 1TB 外部硬碟上損壞的 GPT 分區表。這是 gdisk 的報告:

root@philippe-desktop:/home/philippe/thomasdisk# gdisk /dev/sdb
GPT fdisk (gdisk) version 0.8.8

Caution: invalid main GPT header, but valid backup; regenerating main header
from backup!

Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: damaged

****************************************************************************
Caution: Found protective or hybrid MBR and corrupt GPT. Using GPT, but disk
verification and recovery are STRONGLY recommended.
****************************************************************************

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

Command (? for help): v

No problems found. 262157 free sectors (128.0 MiB) available in 2
segments, the largest of which is 262151 (128.0 MiB) in size.

Command (? for help): p
Disk /dev/sdb: 1953546304 sectors, 931.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): FE2326A4-F411-489E-B0D9-D2D9EF21A00C
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 1953546270
Partitions will be aligned on 8-sector boundaries
Total free space is 262157 sectors (128.0 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1              40          409639   200.0 MiB   EF00  EFI System Partition
   2          409640      1953284119   931.2 GiB   AF00  G-RAID mini

Command (? for help):

據我了解,gdisk 能夠自動解決損壞問題,只需按一下w即可修復我的磁碟,但我不確定(驗證)選項通常v是否應該向我提出恢復選項。

我可以安全地去按w嗎?我已經做了sgdisk -b backup.gpt /dev/sdb

ps:如果這個問題偏離主題,請將我重新導向到正確的網站

答案1

如果您花幾分鐘閱讀上面的輸出,您會發現gdisk它告訴您要做什麼(它發現了問題:invalid main GPT header, but valid backup;,並為您採取了行動:regenerating main header from backup!。它還提出了建議:disk verification and recovery are STRONGLY recommended.-- 您可能應該遵循建議) 。


基於驗證沒有傳回任何問題的事實,您可能可以正常寫出分割區佈局 - 我的理解是gdisk將使用並寫出重新產生的 GPT 資料。

如果你想成為明確的在您的操作中,復原選單有一個選項可以使用備份GPT 標頭(重建/替換主GPT 標頭),您可以專門呼叫該標頭,這似乎是要採取的正確動作(前提是您看到的GPT 佈局)上面看起來很正常 - 否則你可能需要手動重建分割區佈局)。

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