{"id":87,"date":"2024-09-30T02:52:13","date_gmt":"2024-09-30T02:52:13","guid":{"rendered":"https:\/\/plantuml.cn\/?p=87"},"modified":"2024-09-30T02:52:14","modified_gmt":"2024-09-30T02:52:14","slug":"expanding-linux-disk-to-a-directory","status":"publish","type":"post","link":"https:\/\/plantuml.cn\/index.php\/2024\/09\/30\/expanding-linux-disk-to-a-directory\/","title":{"rendered":"Expanding linux disk to a directory"},"content":{"rendered":"\n

Demand<\/h2>\n\n\n\n

To append \/dev\/sda3 <\/code>to \/home <\/code>, you need to mount the \/dev\/sda3 <\/code>to a subdirectory under the \/home <\/code>directory or merge the \/dev\/sda3 <\/code>into an existing \/home <\/code>partition. Here are the detailed steps for both methods:<\/p>\n\n\n\n

Method 1: Mount \/dev\/sda3 <\/code>to a \/home <\/code>subdirectory<\/h2>\n\n\n\n

Create a Mount Point directory<\/h4>\n\n\n\n

First, create a new directory under the \/home <\/code>directory as Mount Point. For example, create a directory named docker <\/code>:<\/p>\n\n\n\n

sudo mkdir \/home\/docker<\/code><\/pre>\n\n\n\n
2. Mount \/dev\/sda3<\/code><\/h4>\n\n\n\n
Use the mount <\/code>command to mount \/dev\/sda3 <\/code>to the newly created directory:<\/p>\n\n\n\n
sudo mount \/dev\/sda3 \/home\/docker<\/code><\/pre>\n\n\n\n
3. Edit \/etc\/fstab <\/code>files<\/h4>\n\n\n\n
To ensure that the system automatically mounts the \/dev\/sda3 <\/code>after a reboot, you need to edit the \/etc\/fstab <\/code>file.<\/p>\n\n\n\n
Open the \/etc\/fstab <\/code>file with your favorite text editor, such as nano <\/code>or vim <\/code>:<\/p>\n\n\n\n
sudo nano \/etc\/fstab<\/code><\/pre>\n\n\n\n
Add the following line at the end of the file:<\/p>\n\n\n\n
\/dev\/sda3 \/home\/docker ext4 defaults 0 0<\/code><\/pre>\n\n\n\n
Save and close the file.<\/p>\n\n\n\n
4. Confirm successful mounting<\/h4>\n\n\n\n
Use the df -h <\/code>command to confirm that \/dev\/sda3 <\/code>has been successfully mounted to the \/home\/docker <\/code>:<\/p>\n\n\n\n
df -h<\/code><\/pre>\n\n\n\n
The output should contain \/dev\/sda3 <\/code>Mount Point.<\/p>\n\n\n\n
Method 2: Merge \/dev\/sda3 <\/code>into an existing \/home <\/code>partition<\/h2>\n\n\n\n
    \n
  1. Confirm if<\/strong> \/dev\/sda3<\/code><\/strong> have been merged<\/strong><\/li>\n<\/ol>\n\n\n\n
    First, confirm that the \/dev\/sda3 <\/code>have been merged into the \/dev\/mapper\/centos-home <\/code>. You can use the pvs <\/code>and vgs <\/code>commands to view information about physical volumes and volume groups.<\/p>\n\n\n\n
    sudo pvs\nsudo vgs<\/code><\/pre>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    From the output of pvs <\/code>and vgs <\/code>, \/dev\/sda2 <\/code>is the only physical volume (PV), and it has been fully allocated to the volume group (VG) centos <\/code>. This means that \/dev\/sda3 <\/code>is not included in the centos <\/code>volume group.<\/p>\n\n\n\n
    Since \/dev\/sda3 <\/code>is not included in the centos <\/code>volume group, you need to add it to the volume group and then expand \/home <\/code>logical volume.<\/p>\n\n\n\n
      \n
    1. Add \/dev\/sda3 <\/code>to centos <\/code>volume group<\/li>\n<\/ol>\n\n\n\n
      First, use the pvcreate <\/code>command to initialize the \/dev\/sda3 <\/code>to a physical volume:<\/p>\n\n\n\n
      sudo pvcreate \/dev\/sda3<\/code><\/pre>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      Then, use the vgextend <\/code>command to add \/dev\/sda3 <\/code>to the centos <\/code>volume group:<\/p>\n\n\n\n
      sudo vgextend centos \/dev\/sda3<\/code><\/pre>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
        \n
      1. Extended \/home <\/code>Logical Volume<\/li>\n<\/ol>\n\n\n\n
        Now you can use the lvextend <\/code>command to add \/dev\/sda3 <\/code>space to \/home <\/code>logical volume:<\/p>\n\n\n\n
        sudo lvextend -l +100%FREE \/dev\/mapper\/centos-home<\/code><\/pre>\n\n\n\n
        \"\"<\/figure>\n\n\n\n
          \n
        1. Extended file system<\/li>\n<\/ol>\n\n\n\n
          Use the resize2fs <\/code>command to extend the file system:<\/p>\n\n\n\n
          sudo resize2fs \/dev\/mapper\/centos-home<\/code><\/pre>\n\n\n\n
          \"\"<\/figure>\n\n\n\n
          From the error message, the resize2fs <\/code>command cannot find a valid filesystem superblock for the \/dev\/mapper\/centos-home <\/code>. This usually means that there is no correct filesystem on the \/dev\/mapper\/centos-home <\/code>, or that the filesystem is corrupted.<\/p>\n\n\n\n
            \n
          1. Confirm file system type<\/strong><\/li>\n<\/ol>\n\n\n\n
            Use the blkid <\/code>command to check \/dev\/mapper\/centos-home <\/code>filesystem type:<\/p>\n\n\n\n
            sudo blkid \/dev\/mapper\/centos-home<\/code><\/pre>\n\n\n\n
            \"\"<\/figure>\n\n\n\n
            As you can see from blkid <\/code>‘s output, the filesystem type on the \/dev\/mapper\/centos-home <\/code>is xfs <\/code>, not ext4 <\/code>. Therefore, you need to use the xfs_growfs <\/code>command to extend the xfs <\/code>filesystem, not resize2fs <\/code>.<\/p>\n\n\n\n
              \n
            1. Extend the xfs <\/code>file system using xfs_growfs <\/code>commands<\/li>\n<\/ol>\n\n\n\n
              sudo xfs_growfs \/dev\/mapper\/centos-home<\/code><\/pre>\n\n\n\n
              \"\"<\/figure>\n\n\n\n
                \n
              1. Confirm expansion successful<\/li>\n<\/ol>\n\n\n\n
                Use the df -h <\/code>command to confirm that the size of the \/home <\/code>partition has increased:<\/p>\n\n\n\n
                df -h<\/code><\/pre>\n\n\n\n
                \"\"<\/figure>\n\n\n\n
                <\/p>\n","protected":false},"excerpt":{"rendered":"
                Demand To append \/dev\/sda3 to \/home , you need to mount … \u7ee7\u7eed\u9605\u8bfb\u201cExpanding linux disk to a directory\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-87","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/plantuml.cn\/index.php\/wp-json\/wp\/v2\/posts\/87"}],"collection":[{"href":"https:\/\/plantuml.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/plantuml.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/plantuml.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/plantuml.cn\/index.php\/wp-json\/wp\/v2\/comments?post=87"}],"version-history":[{"count":1,"href":"https:\/\/plantuml.cn\/index.php\/wp-json\/wp\/v2\/posts\/87\/revisions"}],"predecessor-version":[{"id":96,"href":"https:\/\/plantuml.cn\/index.php\/wp-json\/wp\/v2\/posts\/87\/revisions\/96"}],"wp:attachment":[{"href":"https:\/\/plantuml.cn\/index.php\/wp-json\/wp\/v2\/media?parent=87"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/plantuml.cn\/index.php\/wp-json\/wp\/v2\/categories?post=87"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/plantuml.cn\/index.php\/wp-json\/wp\/v2\/tags?post=87"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}