一、背景
由于安装oracle数据库，磁盘空间不足，已经加了存储，但是没有挂载，需要将/dev/sdb全部挂载到/oracle目录下
[root@database-001 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 50G 0 disk └─sda1 8:1 0 50G 0 part / sdb 8:16 0 800G 0 disk [root@database-001 ~]#
二、开始挂载磁盘
1、查看
[root@database-001 ~]# fdisk -l Disk /dev/sda: 53.7 GB, 53687091200 bytes, 104857600 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: dos Disk identifier: 0x000f24de Device Boot Start End Blocks Id System /dev/sda1 * 2048 104857566 52427759+ 83 Linux Disk /dev/sdb: 859.0 GB, 858993459200 bytes, 1677721600 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 [root@database-001 ~]# 从上面查看，/dev/sdb 可以挂载2、挂载磁盘
说明：
分区的起始磁柱值和截止磁柱值计算方法：
sectors值=容量/512 bytes，1GiB=1073741824 bytes
- First sector (2048-209715199, default 2048)是数据盘/dev/vdb（100 GiB）的磁柱范围
截止磁柱值=sectors值-1=(100 * 1073741824 / 512)-1=209715200-1=209715199
- 数据盘/dev/vdb的第1个分区/dev/vdb1（40 GiB）：
起始磁柱值=2048（此处使用数据盘/dev/vdb的起始磁柱）
截止磁柱值=sectors值-1=（40 * 1073741824 / 512 ）-1=83886079
- 数据盘/dev/vdb的第2个分区/dev/vdb2（60 GiB）：
起始磁柱值 = /dev/vdb1的截止磁柱值 + 1 = 83886079+1 = 83886080
截止磁柱值 = 起始磁柱值 + sectors - 1 = 83886080+(60 * 1073741824 / 512 ) -1 = 209715199
fdisk /dev/sdb ：开始挂载
n：新建一个分区
p：“p”表示主分区，“e”表示扩展分区。
1："Partition number (1-4): "选择主分区号 输入"1"表示第一个主分区
First sector：起始磁柱值
Last sector：截止磁柱值
p：查看分区情况
w：保存
[root@database-001 ~]# fdisk /dev/sdb Welcome 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. Command (m for help): n Partition type: p primary (1 primary, 0 extended, 3 free) e extended Select (default p):p Partition number (1-4, default 1): 1 First sector (2048-1677721599, default 2048): Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-1677721599, default 1677721599): 1677721599 Partition 1 of type Linux and of size 800 GiB is set Command (m for help): p Disk /dev/sdb: 859.0 GB, 858993459200 bytes, 1677721600 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: dos Disk identifier: 0xf3c5bc73 Device Boot Start End Blocks Id System /dev/sdb1 2048 1677721599 838859776 83 Linux Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. [root@database-001 ~]#3、确认分区格式
[root@database-001 ~]# parted /dev/sdb GNU Parted 3.1 Using /dev/sdb Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) p Model: Huawei VBS fileIO (scsi) Disk /dev/sdb: 859GB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 1049kB 859GB 859GB primary (parted) q [root@database-001 ~]#说明：
“Partition Table：msdos”表示磁盘分区格式为MBR
输入“q”，按“Enter”，退出parted模式。
4、对分区/dev/sdb1 创建ext4文件系统
[root@database-001 ~]# mkfs -t ext4 /dev/sdb1 mke2fs 1.42.9 (28-Dec-2013) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 52428800 inodes, 209714944 blocks 10485747 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=2357198848 6400 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done [root@database-001 ~]#5、再次确认分区格式
执行“parted /dev/sdb”命令，再输入“p”，查看分区文件系统类型已经是ext4。
[root@database-001 ~]# parted /dev/sdb GNU Parted 3.1 Using /dev/sdb Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) p Model: Huawei VBS fileIO (scsi) Disk /dev/sdb: 859GB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 1049kB 859GB 859GB primary ext4 (parted) q [root@ecs-database-001 ~]#6、新建目录，并将新建分区挂载至新建目录
[root@database-001 ~]# mkdir /oracle [root@database-001 ~]# mount /dev/sdb1 /oracle [root@database-001 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 50G 0 disk └─sda1 8:1 0 50G 0 part / sdb 8:16 0 800G 0 disk └─sdb1 8:17 0 800G 0 part /oracle7、使用磁盘分区的UUID来设置开机自动挂载磁盘分区
-- 查询磁盘分区的UUID。 [root@database-001 ~]# blkid /dev/sdb1 /dev/sdb1: UUID="c5a0a667-fa70-49ee-aaf3-6ef60b81f633" TYPE="ext4" -- 设置开机自动挂载磁盘分区 [root@database-001 ~]# vi /etc/fstab UUID=c5a0a667-fa70-49ee-aaf3-6ef60b81f633 /oracle ext4 defaults 0 2
8、挂载完成
[root@database-001 ~]# df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 31G 0 31G 0% /dev tmpfs 31G 0 31G 0% /dev/shm tmpfs 31G 8.6M 31G 1% /run tmpfs 31G 0 31G 0% /sys/fs/cgroup /dev/sda1 50G 4.0G 43G 9% / tmpfs 6.1G 0 6.1G 0% /run/user/0 /dev/sdb1 788G 73M 748G 1% /oracle [root@database-001 ~]#
