測試系統中的磁碟是否已格式化的方法

目前正在從事一個項目，我正在處理多個系統中的任意一組磁碟。我編寫了一套軟體來燒錄這些磁碟。該過程的一部分是格式化磁碟。在測試我的軟體時，我意識到如果在格式化磁碟過程中的某個時刻，程序停止/終止，並且我想重新啟動程序，我真的不想重新格式化集合中的所有磁碟，這些磁碟已經格式化成功。

我從一個沒有安裝磁碟的 ramfs 執行這個軟體，而且我正在處理的任何磁碟都沒有被安裝，我的軟體除了測試之外沒有使用它們，所以這些壞男孩會發生任何事情。沒有值得關注的數據。

編輯：

不，我沒有分區。

是的，ext2 fs。

這是我用來格式化的命令：

(/sbin/mke2fs -q -O sparse_super,large_file -m 0 -T largefile -T xfs -FF $drive >> /tmp/mke2fs_drive.log 2>&1 & echo $? > $status_file &)

解決方案：

感謝 Jan 的以下建議：

# lsblk -f /dev/<drv>我編寫了以下 shell 函式，它按預期工作。

來源

is_formatted()
{
 drive=$1
 fs_type=$2

 if [[ ! -z $drive ]]
 then
   if [[ ! -z $fs_type ]]
   then
     current_fs=$(lsblk -no KNAME,FSTYPE $drive)

     if [[ $(echo $current_fs | wc -w) == 1 ]]
     then
       echo "[INFO] '$drive' is not formatted. Formatting."
       return 0
     else
       current_fs=$(echo $current_fs | awk '{print $2}')

       if [[ $current_fs == $fs_type ]]
       then
         echo "[INFO] '$drive' is formatted with correct fs type. Moving on."
         return 1
       else
         echo "[WARN] '$drive' is formatted, but with wrong fs type '$current_fs'. Formatting."
         return 0
       fi
     fi
   else
     echo "[WARN] is_formatted() was called without specifying fs_type. Formatting."
     return 0
   fi
 else
   echo "[FATAL] is_formatted() was called without specifying a drive. Quitting."
   return -1
 fi
}

數據

sdca  ext2             46b669fa-0c78-4b37-8fc5-a26368924b8c
sdce  ext2             1a375f80-a08c-4889-b759-363841b615b1
sdck  ext2             f4f43e8c-a5c6-495f-a731-2fcd6eb6683f
sdcn
sdby  ext2             cf276cce-56b1-4027-a795-62ef62d761fa
sdcd  ext2             42fdccb8-e9bc-441e-a43a-0b0f8d409c71
sdci  ext2             d6e7dc60-286d-41e2-9e1b-a64d42072253
sdbw  ext2             c3986491-b83f-4001-a3bd-439feb769d6a
sdch  ext2             3e7dba24-e3ec-471a-9fae-3fee91f988bd
sdcq
sdcf  ext2             8fd2a6fd-d1ae-449b-ad48-b2f9df997e5f
sdcs
sdco
sdcw  ext2             27bf220e-6cb3-4953-bee4-aff27c491721
sdcp  ext2             133d9474-e696-49a7-9deb-78d79c246844
sdcx
sdct
sdcu
sdcy
sdcr
sdcv
sdde
sddc  ext2             0b22bcf1-97ea-4d97-9ab5-c14a33c71e5c
sddi  ext2             3d95fbcb-c669-4eda-8b57-387518ca0b81
sddj
sddb
sdda  ext2             204bd088-7c48-4d61-8297-256e94feb264
sdcz
sddk  ext2             ed5c8bd8-5168-487f-8fee-4b7c671ef2cb
sddl
sddn
sdds  ext2             647d2dea-f71d-4e87-bbe5-30f6424b36c9
sddf  ext2             47128162-bcb7-4eab-802d-221e8eb36074
sddo
sddh  ext2             b7f41e1a-216d-4580-97e6-f2df917754a8
sddg  ext2             39b838e0-f0ae-447c-8876-2d36f9099568

這產生了：

[INFO] '/dev/sdca' is formatted with correct fs type. Moving on.
[INFO] '/dev/sdce' is formatted with correct fs type. Moving on.
[INFO] '/dev/sdck' is formatted with correct fs type. Moving on.
[INFO] '/dev/sdcn' is not formatted. Formatting.
[INFO] '/dev/sdby' is formatted with correct fs type. Moving on.
[INFO] '/dev/sdcd' is formatted with correct fs type. Moving on.
[INFO] '/dev/sdci' is formatted with correct fs type. Moving on.
[INFO] '/dev/sdbw' is formatted with correct fs type. Moving on.
[INFO] '/dev/sdch' is formatted with correct fs type. Moving on.
[INFO] '/dev/sdcq' is not formatted. Formatting.
[INFO] '/dev/sdcf' is formatted with correct fs type. Moving on.
[INFO] '/dev/sdcs' is not formatted. Formatting.
[INFO] '/dev/sdco' is not formatted. Formatting.
[INFO] '/dev/sdcw' is formatted with correct fs type. Moving on.
[INFO] '/dev/sdcp' is formatted with correct fs type. Moving on.
[INFO] '/dev/sdcx' is not formatted. Formatting.
[INFO] '/dev/sdct' is not formatted. Formatting.
[INFO] '/dev/sdcu' is not formatted. Formatting.
[INFO] '/dev/sdcy' is not formatted. Formatting.
[INFO] '/dev/sdcr' is not formatted. Formatting.
[INFO] '/dev/sdcv' is not formatted. Formatting.
[INFO] '/dev/sdde' is not formatted. Formatting.
[INFO] '/dev/sddc' is formatted with correct fs type. Moving on.
[INFO] '/dev/sddi' is formatted with correct fs type. Moving on.
[INFO] '/dev/sddj' is not formatted. Formatting.
[INFO] '/dev/sddb' is not formatted. Formatting.
[INFO] '/dev/sdda' is formatted with correct fs type. Moving on.
[INFO] '/dev/sdcz' is not formatted. Formatting.
[INFO] '/dev/sddk' is formatted with correct fs type. Moving on.
[INFO] '/dev/sddl' is not formatted. Formatting.
[INFO] '/dev/sddn' is not formatted. Formatting.
[INFO] '/dev/sdds' is formatted with correct fs type. Moving on.
[INFO] '/dev/sddf' is formatted with correct fs type. Moving on.
[INFO] '/dev/sddo' is not formatted. Formatting.
[INFO] '/dev/sddh' is formatted with correct fs type. Moving on.
[INFO] '/dev/sddg' is formatted with correct fs type. Moving on.

請注意，魔法藥水正在擴展 Jan 的建議，以簡單地輸出我關心的內容：lsblk -no KNAME,FSTYPE $drive

根據您訪問驅動器的方式，您可以blkid -o list在它們上使用（不推薦使用）然後解析輸出。

該命令會輸出顯示文件系統的 fs_type 標籤列等。

blkid -o list已被取代lsblk -f。

我將使用的邏輯可能看起來有點複雜，但我認為它應該擷取故障模式。

基本上步驟是

1. 妻子2fs
2. 掛載文件系統
3. 在文件系統中創建一個名為“format.complete”的文件
4. 解除安裝文件系統

所以我們需要在此之前進行一些測試。邏輯是：

1. 嘗試$tmpmount強制掛載文件系統ext2
2. 如果mount返回錯誤程式碼 ==> Goto NOT FORMATTED
3. 如果$tmpmount/lost+found不存在，則安裝一個奇怪的文件系統；不應該發生，但是umount…… 轉到未格式化
4. 如果$tmpmount/format.complete不存在則格式被中斷；umount. 轉到未格式化
5. umount==> 格式化，跳到下一個磁碟。

“未格式化”將是原始的 4 個步驟。

我們可以將這些結構加在一起。結果是磁碟只有在沒有format.complete文件的情況下才會被格式化。

格式化所有磁碟後，您可以選擇重新安裝每個磁碟並刪除format.complete文件。

本質上，我們在每個磁碟上維護少量狀態，並使用它來確定格式化是否成功。

引用自：https://unix.stackexchange.com/questions/299715