Shulou(Shulou.com)06/02 Report--

Environment file system: ext4 partition type: MBROS:CentOS7 create partition [root@CentOS7 ~] # echo-e "n\ nw" | fdisk / dev/sdbWelcome to fdisk (util-linux 2.23.2) .Changes will remain in memory only, until you decide to write them.Be careful before using the write command.Device does not contain a recognized partition tableBuilding a new DOS disklabel with disk identifier 0xb2302c66.Command (m for help): Partition type: P primary (0 primary, 0 extended) 4 free) e extendedSelect (default p): Using default response pPartition number (1-4, default 1): First sector (2048-41943039, default 2048): Using default value 2048Last sector, + sectors or + size {K default G} (2048-41943039, default 41943039): Using default value 41943039Partition 1 of type Linux and of size 20 GiB is setCommand (m for help): The partition table has been altered calling ioctl () to re-read partition table.Syncing disks. [root@CentOS7 ~] # fdisk-l / dev/sdbDisk / dev/sdb: 21.5GB, 21474836480 bytes 41943040 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk label type: dosDisk identifier: 0xb2302c66 Device Boot Start End Blocks Id System/dev/sdb1 2048 41943039 20970496 83 Linuxps: only / dev/sdb disk is divided into a single partition All the space is given to it to create the file system [root@CentOS7] # mkfs.ext4 / dev/sdb1mke2fs 1.42.9 (28-Dec-2013) Filesystem label=OS type: LinuxBlock size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks1310720 inodes, 5242624 blocks262131 blocks (5.00%) reserved for the super userFirst data block=0Maximum filesystem blocks=2153775104160 block groups32768 blocks per group, 32768 fragments per group8192 inodes per groupSuperblock backups stored on blocks: 32768,98304,163840,229376,294912,819200,884736,1605632,2654208 4096000Allocating group tables: doneWriting inode tables: done Creating journal (32768 blocks): doneWriting superblocks and filesystem accounting information: donemount mount [root@CentOS7 ~] # mkdir / mnt/sdb1 Mount / dev/sdb1 / mnt/sdb1 [root@CentOS7 ~] # findmnt / mnt/sdb1 TARGET SOURCE FSTYPE OPTIONS/mnt/sdb1 / dev/sdb1 ext4 rw,relatime Data=ordered permanent mount [root@CentOS7 ~] # echo-e "/ dev/sdb1\ t/mnt/sdb1\ text4\ tdefaults\ t0\ t0" > / etc/fstab [root@CentOS7 ~] # sed-n'$p' / etc/fstab / dev/sdb1 / mnt/sdb1 ext4 defaults 0 0/etc/fstab explains that each line defines a file system to be mounted. First column: device to be mounted or pseudo file system device file LABEL:LABEL= "" UUID:UUID= "" pseudo file system name: proc Sysfs second column: Mount point third column: file system type: ext4 Xfs,iso9660,nfs,none fourth column: mounting options: defaults, acl,bind fifth column: dump frequency 0: no backup 1: daily dump 2: dump column 6: order of file systems checked by fsck every other day, the allowed number is 0 120: no self test 1: first self test Generally only rootfs uses 2: non-rootfs use common disk management commands to synchronize the partition table to see if the kernel has recognized the new partition cat / proc/partitions informs the kernel to reread the hard disk partition table CentOS6:partx / dev/DEVICE CentOS5,7:partprobe / dev/DEVICE create a file system mkfs command: 1) mkfs.FS_TYPE / dev/DEVICE 2) mkfs-t FS_TYPE / dev/DEVICE file system label blkid: check Find / print block device attribute Usage: blkid-L |-U findfs: find the file system by label or UUID Usage: findfs [options] {LABEL UUID,PARTUUID,PARTLABEL} =

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