分區管理工具-gdisk命令實戰案例
作者：尹正傑
版權聲明：原創作品，謝絕轉載！否則將追究法律責任。
gdisk工具擅長管理GPT分區。接下來我們就簡單介紹一下該工具的使用。
一.分區表概述
博主推薦閱讀: https://www.cnblogs.com/yinzhengjie/p/12347792.html
二.安裝gdisk
gdisk工具和fdisk很類似，都是對磁盤進行分區管理的開源工具。如下圖所示，fdisk對於GPT分區方式目前只是實驗性的，因此生成環境建議大家謹慎使用。
我們的gdisk工具很擅長處理GPT分區方式,不僅如此還支持MBR以及APM和BSD分區方式(雖說后兩者分區方式使用相對較少,感興趣的同學可以自行查閱相關資料)。
綜上所述,如果生產環境您使用GPT分區推薦使用gdisk工具，最小化安裝的系統需要手動安裝喲~
[root@yinzhengjie.com ~]# yum -y install gdisk Loaded plugins: fastestmirror Determining fastest mirrors * base: mirror.bit.edu.cn * extras: mirrors.bfsu.edu.cn * updates: mirror.bit.edu.cn base | 3.6 kB 00:00:00 extras | 2.9 kB 00:00:00 updates | 2.9 kB 00:00:00 (1/4): updates/7/x86_64/primary_db | 168 kB 00:00:00 (2/4): extras/7/x86_64/primary_db | 190 kB 00:00:00 (3/4): base/7/x86_64/group_gz | 153 kB 00:00:01 (4/4): base/7/x86_64/primary_db | 6.1 MB 00:00:03 Resolving Dependencies --> Running transaction check ---> Package gdisk.x86_64 0:0.8.10-3.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ============================================================================================================================================================================ Package Arch Version Repository Size ============================================================================================================================================================================ Installing: gdisk x86_64 0.8.10-3.el7 base 190 k Transaction Summary ============================================================================================================================================================================ Install 1 Package Total download size: 190 k Installed size: 660 k Downloading packages: gdisk-0.8.10-3.el7.x86_64.rpm | 190 kB 00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : gdisk-0.8.10-3.el7.x86_64 1/1 Verifying : gdisk-0.8.10-3.el7.x86_64 1/1 Installed: gdisk.x86_64 0:0.8.10-3.el7 Complete! [root@yinzhengjie.com ~]#
三.gdisk工具使用案例
[root@yinzhengjie.com ~]# gdisk /dev/sdc #進入到gdisk工具的管理界面 GPT fdisk (gdisk) version 0.8.10 Partition table scan: MBR: not present BSD: not present APM: not present GPT: not present Creating new GPT entries. Command (? for help):
1>.查看幫助信息
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):
2>.新建分區
Command (? for help): n #執行新建分區的指令 Partition number (1-128, default 1): First sector (34-838860766, default = 2048) or {+-}size{KMGTP}: Last sector (2048-838860766, default = 838860766) or {+-}size{KMGTP}: +100G #這里的結束位置我這里寫+100G Current type is 'Linux filesystem' Hex code or GUID (L to show codes, Enter = 8300): #我們可以自定義創建分區的代碼(默認是8300),輸入字母"l"可以查看所有的代碼標簽喲~通常情況下我們直接回車即可。 Changed type of partition to 'Linux filesystem' Command (? for help):
3>.查看分區信息
Command (? for help): p Disk /dev/sdc: 838860800 sectors, 400.0 GiB Logical sector size: 512 bytes Disk identifier (GUID): 37B1331C-C436-48CA-B5A6-B157D0BB9AD0 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 838860766 Partitions will be aligned on 2048-sector boundaries Total free space is 629145533 sectors (300.0 GiB) Number Start (sector) End (sector) Size Code Name 1 2048 209717247 100.0 GiB 8300 Linux filesystem Command (? for help):
4>.保存分區信息並退出
Command (? for help): w #保存分區信息到磁盤(默認所有的修改都放在內存中，直到執行當前的寫入指令才會寫入到磁盤。) Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING PARTITIONS!! Do you want to proceed? (Y/N): Y #注意哈，這里得輸入字母"Y"才能保存成功喲~ OK; writing new GUID partition table (GPT) to /dev/sdc. The operation has completed successfully. [root@yinzhengjie.com ~]#
5>.命令行中查看gpt的分區信息
[root@yinzhengjie.com ~]# gdisk -l /dev/sdc GPT fdisk (gdisk) version 0.8.10 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Disk /dev/sdc: 838860800 sectors, 400.0 GiB Logical sector size: 512 bytes Disk identifier (GUID): C4A5426E-BE89-46EE-B842-3CAC96156388 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 838860766 Partitions will be aligned on 2048-sector boundaries Total free space is 629145533 sectors (300.0 GiB) Number Start (sector) End (sector) Size Code Name 1 2048 209717247 100.0 GiB 8300 Linux filesystem [root@yinzhengjie.com ~]#
[root@yinzhengjie.com ~]# fdisk -l /dev/sdc WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion. Disk /dev/sdc: 429.5 GB, 429496729600 bytes, 838860800 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: gpt Disk identifier: C4A5426E-BE89-46EE-B842-3CAC96156388 # Start End Size Type Name 1 2048 209717247 100G Linux filesyste Linux filesystem [root@yinzhengjie.com ~]# [root@yinzhengjie.com ~]#