centos 7.2 add a new disk drive

steps

1. list all disk drive

   1. use ll

       # ll /dev/disk/by-path
       lrwxrwxrwx. 1 root root  9 10 17 22:11 pci-0000:00:17.0-ata-1.0 -> ../../sda
       lrwxrwxrwx. 1 root root 10 10 17 22:11 pci-0000:00:17.0-ata-1.0-part1 -> ../../sda1
       lrwxrwxrwx. 1 root root 10 10 17 22:11 pci-0000:00:17.0-ata-1.0-part2 -> ../../sda2
       lrwxrwxrwx. 1 root root 10 10 17 22:11 pci-0000:00:17.0-ata-1.0-part3 -> ../../sda3
       lrwxrwxrwx. 1 root root 10 10 17 22:11 pci-0000:00:17.0-ata-1.0-part4 -> ../../sda4
       lrwxrwxrwx. 1 root root 10 10 17 22:11 pci-0000:00:17.0-ata-1.0-part5 -> ../../sda5
       lrwxrwxrwx. 1 root root  9 10 17 22:11 pci-0000:00:17.0-ata-2.0 -> ../../sdb
       lrwxrwxrwx. 1 root root 10 10 17 22:11 pci-0000:00:17.0-ata-2.0-part1 -> ../../sdb1
       lrwxrwxrwx. 1 root root  9 10 17 22:11 pci-0000:00:17.0-ata-3.0 -> ../../sr0
       lrwxrwxrwx. 1 root root  9 10 17 22:11 pci-0000:00:17.0-ata-4.0 -> ../../sdc
       lrwxrwxrwx. 1 root root 10 10 17 22:11 pci-0000:00:17.0-ata-4.0-part1 -> ../../sdc1
      

   2. use ls

       # ls /dev/sd*
       /dev/sda  /dev/sda1  /dev/sda2  /dev/sda3  /dev/sda4  /dev/sda5  /dev/sdb  /dev/sdb1  /dev/sdc  /dev/sdc1
      

2. format disk drive

   1. use fdisk

       # fdisk /dev/sdb
       ...
       Command (m for help): d <= delete a partition
       Command (m for help): n <= add a new partition
       Command action
          e extended
          p primary partition(1-4)
       p <= primary partition
       Partition number (1-4): 1
       ... <= use default value, hit enter key
      
       Command (m for help):p <= print the partition table
       ...
       Command (m for help):w <= write table to disk and exit
      

3. create a fs on disk partition

   1. use mkfs.ext4

       # mkfs.ext4 /dev/sdb1
      

4. mount fs

   1. use mount

       # mkdir /mnt/disk1
       # mount /dev/sdb1 /mnt/disk1
       # mount
       /dev/sda1 on /boot/efi type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=ascii,shortname=winnt,errors=remount-ro)
       /dev/sda2 on / type xfs (rw,relatime,seclabel,attr2,inode64,noquota)
       /dev/sda3 on /var/log type xfs (rw,relatime,seclabel,attr2,inode64,noquota)
       /dev/sdb1 on /mnt/disk1 type ext4 (rw,relatime,seclabel,data=ordered)
       /dev/sdc1 on /mnt/disk2 type ext4 (rw,relatime,seclabel,data=ordered)
       ...
      

5. auto mount config

   1. use /etc/fstab file

       # nano /etc/fstab
       ...
       /dev/sdb1                                 /mnt/disk1              ext4    defaults        0 0
       /dev/sdc1                                 /mnt/disk2              ext4    defaults        0 0
      

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