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Disk capacity is at 105GB, but the root directory (/dev/sda3) capacity is only 39GB, I want to increase the capacity. How can we do this? By the way, the OS is Oracle Linux Server 7.9.

$ df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 11G 0 11G 0% /dev tmpfs 11G 0 11G 0% /dev/shm tmpfs 11G 115M 11G 2% /run tmpfs 11G 0 11G 0% /sys/fs/cgroup /dev/sda3 39G 23G 17G 58% / /dev/sda1 200M 7.9M 192M 4% /boot/efi tmpfs 2.1G 0 2.1G 0% /run/user/0 tmpfs 2.1G 0 2.1G 0% /run/user/1000 tmpfs 2.1G 0 2.1G 0% /run/user/994 $ fdisk -l Disk /dev/sda: 105.2 GB, 105226698752 bytes, 205520896 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 1048576 bytes Disk label type: dos Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 97677311 48838655+ ee GPT Partition 1 does not start on physical sector boundary. $ cat /etc/os-release NAME="Oracle Linux Server" VERSION="7.9" ID="ol" ID_LIKE="fedora" VARIANT="Server" VARIANT_ID="server" VERSION_ID="7.9" PRETTY_NAME="Oracle Linux Server 7.9" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:oracle:linux:7:9:server" HOME_URL="https://linux.oracle.com/" BUG_REPORT_URL="https://bugzilla.oracle.com/" ORACLE_BUGZILLA_PRODUCT="Oracle Linux 7" ORACLE_BUGZILLA_PRODUCT_VERSION=7.9 ORACLE_SUPPORT_PRODUCT="Oracle Linux" ORACLE_SUPPORT_PRODUCT_VERSION=7.9

I tried everything, but could not do it. I have a feeling I'm missing some steps.

$ resize2fs /dev/sda3 resize2fs 1.45.4 (23-Sep-2019) resize2fs: Bad magic number in super-block while trying to open /dev/sda3 Couldn't find valid filesystem superblock. $ xfs_growfs /dev/sda3 -D size meta-data=/dev/sda3 isize=256 agcount=4, agsize=2515200 blks = sectsz=4096 attr=2, projid32bit=1 = crc=0 finobt=0, sparse=0, rmapbt=0 = reflink=0 data = bsize=4096 blocks=10060800, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0, ftype=1 log =internal log bsize=4096 blocks=4912, version=2 = sectsz=4096 sunit=1 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data size unchanged, skipping # df -hT Filesystem Type Size Used Avail Use% Mounted on devtmpfs devtmpfs 11G 0 11G 0% /dev tmpfs tmpfs 11G 0 11G 0% /dev/shm tmpfs tmpfs 11G 115M 11G 2% /run tmpfs tmpfs 11G 0 11G 0% /sys/fs/cgroup /dev/sda3 xfs 39G 23G 17G 58% / /dev/sda1 vfat 200M 7.9M 192M 4% /boot/efi tmpfs tmpfs 2.1G 0 2.1G 0% /run/user/0 tmpfs tmpfs 2.1G 0 2.1G 0% /run/user/1000 tmpfs tmpfs 2.1G 0 2.1G 0% /run/user/994
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  • You cannot extend the size of /dev/sda3 as it is a physical device. You can however add more storage to the machine and create a volume that can be expanded and then move the content of /dev/sda3 to the newly created volume. Commented Mar 29, 2022 at 8:09
  • @LasseMichaelMølgaard Thank you for your response. By executing fdisk -l, it shows that my Disk capacity is 105GB, but I am currently using only 39GB, which means I can create at least a 65GB expandable volume, is that right? How should I do this? Commented Mar 29, 2022 at 8:27
  • Well if there is space left on the physical device (sda), then you could just use resizefs /dev/sda3 to expand your volume. Commented Mar 29, 2022 at 8:46
  • I tried everything, but could not do it. I have a feeling I'm missing some steps. sh $ resize2fs /dev/sda3 resize2fs 1.45.4 (23-Sep-2019) resize2fs: Bad magic number in super-block while trying to open /dev/sda3 Couldn't find valid filesystem superblock. Commented Mar 29, 2022 at 10:48

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