How to mount a new virtual disk in linux

When the disk resources allocated to the virtual machine are insufficient, you need to add a new virtual disk. The following is the mounting procedure, which has been verified: 1. When the instance is shut down, add a disk as needed. 2. View disk # fdisk-l // view the disk information. new information is displayed. & nb
When the disk resources allocated to the virtual machine are insufficient, you need to add a new virtual disk. The following is the mounting procedure, which has been verified: 1. When the instance is shut down, add a disk as needed. 2. View Disk # fdisk-l // view the Disk information. the newly added Disk is displayed, for example, Disk/dev/hdb: 27.9 GB, 27917287424 bytes 3. Partition the new disk # fdisk/dev/hdb (based on your own disk name) Command (m for help): n // parameter n, indicating to create a new partition press enter Command action: e extended // input e to create an extended partition p primary partition (1-4) // input p to create a primary partition input parameter p press enter Partion number (1-4 ): 1 // you can divide up to four primary partitions as needed. Input 1 here, which means to create the First primary partition and press enter First Cylinder (1-1014, default 1 ): 1 // number of disk blocks starting from the first primary partition. you can select the default value 1. press enter Last cylindet or + siza or + sizeM or + sizeK: + 1024 MB // it can be a number in MB or a disk block. Here we enter + MB to indicate that the partition size is 1 GB www. 2cto.com press enter or press enter to create only one partition. by default, press enter to create a partition. if you want to create more partitions, follow the steps above to continue the creation, after all partitions are created, they must be saved. Command (m for help): w // Save the newly created partition and press enter to create the partition. # Fdisk-l // view the created partition. Some partitions may need to be restarted. Format the newly created partition # mkfs-t ext3 (disk type after formatting)-c/dev/hdb1 (disk partition to be formatted) 5. Mount the formatted partition to the desired directory. for example, you can create a new directory in the root directory. # Mkdir test # mount/dev/hdb1/test note: Generally, the mount directory is empty and mounted to the previous partition (accurate to a file system) then we can see what is in that partition. Www.2cto.com but Linux does not force you to mount a file system to an empty directory. if/home is a directory in the root partition/, the subdirectories and files below account for 500 MB, then you mount/dev/hdb1 to/home, so the 500 M file in the original/home will not be seen, instead of the content in the/dev/hdb1 partition. The files are still on the hard disk, but you can't see them and you can't use them until you unmount/home and the original content is displayed again. After mounting the file, you can check whether the file is mounted. # Df-TH/dev/hdb1 ext3 28G 648 M 26G 3%/test // it shows that it has been mounted to the test Directory 6. Enable automatic mounting after the system restarts # vi/etc/fstab and add a sentence/dev/hdb1/test ext3 defaults 1 2. then restart the system and mount it to the test partition automatically. 7. Common df commands are described as follows: Function: view the status information of the Linux file system, and display the capacity, used, unused, and Mount points of each partition. Syntax: df [option]... [file]... parameter description:-a, -- all includes the file system-B with a size of 0 blocks, -- block-size = the size block is measured in-h in bytes of a specified size>, -- human-readable prints out the file system size in an easy-to-understand format (for example, 1 K 234 M 2G)-H, -- si is similar to-h, however, take the power of 1000 instead of 1024-I. -- inodes displays inode information instead of block usage www.2cto.com-k, that is, -- block-size = 1 K-l, -- local only displays the local file system -- no-sync does not perform the sync action before getting the used data (default)-P, -- portability uses the POSIX output format -- sync first performs the sync action-t, -- type = to print only the file system information of the specified type>-T, -- print-type: print the file system type-x, -- exclude-type = type: print only the file system information that is not the specified type>-v (this option is not processed) -- help: displays the help information and leaves. -- version: displays the version information and leaves.
Common operations: df-k displays information about each partition in kilobytes of KB. df-a shows all partitions, including partitions with a size of 0. df-T shows the partition type. The author cao527121128, such as EXT2 or EXT3.