Linux

修復 graid mini 磁碟上損壞的 GPT 分區

  • April 4, 2015

我正在嘗試修復 graid mini 1TB 外部硬碟驅動器上的 GPT 損壞分區表。以下是來自 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,並且只需按下即可w修復我的磁碟,但我不確定v(驗證)選項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:如果這個問題是題外話,請將我重定向到正確的網站

如果你花幾分鐘閱讀上面的輸出,你會發現gdisk它告訴你該怎麼做(它發現了一個問題:invalid main GPT header, but valid backup;,並為你採取了行動:regenerating main header from backup!。它也在提出建議:disk verification and recovery are STRONGLY recommended.——你可能應該遵循建議) .


基於驗證沒有返回任何問題的事實,您可能可以寫出分區佈局 - 我的理解是gdisk將使用並寫出重新生成的 GPT 數據。

如果您想在您的操作中明確表示,恢復菜單有一個選項可以使用您可以專門呼叫的備份 GPT 標頭(重建/替換主 GPT 標頭),這似乎是要採取的正確操作(前提是您在上面看到的 GPT 佈局看起來很正常 - 否則您可能必須手動重建分區佈局)。

引用自:https://serverfault.com/questions/564581