reference
https://www.cnblogs.com/kevingrace/p/7612741.html
https://blog.csdn.net/ninghao2015/article/details/73382405
https://www.cnblogs.com/wq242424/p/9187285.html
常用命令
lsblk，df，fdisk
开机自动挂载
vi /etc/fstab
/dev/sdb1 /home/admin/test ext4 defaults 0 0
# 挂载所有
mount -a
磁盘格式化
mkfs.ext4 /dev/sdb2
fdisk划分
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.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0xeea96a98.
WARNING: The size of this disk is 7.0 TB (6997575467008 bytes).
DOS partition table format can not be used on drives for volumes
larger than (2199023255040 bytes) for 512-byte sectors. Use parted(1) and GUID
partition table format (GPT).
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-4294967295, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-4294967294, default 4294967294): 4194030000
Partition 1 of type Linux and of size 2 TiB is set
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@localhost admin]#
[root@localhost admin]#
[root@localhost admin]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 931G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 930G 0 part
├─centos-root 253:0 0 50G 0 lvm /
├─centos-swap 253:1 0 15.8G 0 lvm [SWAP]
└─centos-home 253:2 0 864.2G 0 lvm /home
sdb 8:16 0 6.4T 0 disk
└─sdb1 8:17 0 2T 0 part
parted 划分
[root@localhost admin]# 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: DELL PERC H700 (scsi)
Disk /dev/sdb: 6998GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
(parted) mklabel gpt
Warning: The existing disk label on /dev/sdb will be destroyed and all data on this disk will be lost. Do you
want to continue?
Yes/No? y
(parted) mkpart
Partition name? []? sdb1
File system type? [ext2]? ext4
Start? 0
End? 3000GB
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? ignore
(parted) p
Model: DELL PERC H700 (scsi)
Disk /dev/sdb: 6998GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 17.4kB 3000GB 3000GB sdb1
(parted) p
Model: DELL PERC H700 (scsi)
Disk /dev/sdb: 6998GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 17.4kB 3000GB 3000GB sdb1
(parted) p
Model: DELL PERC H700 (scsi)
Disk /dev/sdb: 6998GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 17.4kB 3000GB 3000GB sdb1
(parted) mkpart
Partition name? []? sdb2
File system type? [ext2]? ext4
Start?
Start? 3000GB
End? 6998GB
(parted) p
Model: DELL PERC H700 (scsi)
Disk /dev/sdb: 6998GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 17.4kB 3000GB 3000GB sdb1
2 3000GB 6998GB 3998GB sdb2
(parted) quit
Information: You may need to update /etc/fstab.
[root@localhost admin]#
[root@localhost admin]#
[root@localhost admin]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 931G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 930G 0 part
├─centos-root 253:0 0 50G 0 lvm /
├─centos-swap 253:1 0 15.8G 0 lvm [SWAP]
└─centos-home 253:2 0 864.2G 0 lvm /home
sdb 8:16 0 6.4T 0 disk
├─sdb1 8:17 0 2.7T 0 part
└─sdb2 8:18 0 3.7T 0 part
注意Warning: The resulting partition is not properly aligned for best performance. Ignore/Cancel? ignore
这句话虽然不影响，但是可以合理划分解决
reference :https://www.cnblogs.com/wq242424/p/9187285.html
[root@localhost zhang]# cat /sys/block/sdb/queue/optimal_io_size
0
[root@localhost zhang]# cat /sys/block/sdb/queue/minimum_io_size
512
[root@localhost zhang]# cat /sys/block/sdb/alignment_offset
0
[root@localhost zhang]# cat /sys/block/sdb/queue/physical_block_size
512
(parted) mkpart primary 2048s 25%
(parted) mkpart primary 25% 50%
(parted) mkpart primary 50% 75%
(parted) mkpart primary 75% 100%
(parted)
(parted) align-check optimal 1
1 aligned
(parted)
(parted) quit
Information: You may need to update /etc/fstab.
[root@localhost zhang]#
[root@localhost zhang]#
[root@localhost zhang]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 136.1G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 135.1G 0 part
├─centos-root 253:0 0 50G 0 lvm /
├─centos-swap 253:1 0 13.6G 0 lvm [SWAP]
└─centos-home 253:2 0 71.5G 0 lvm /home
sdb 8:16 0 9.1T 0 disk
├─sdb1 8:17 0 2.3T 0 part
├─sdb2 8:18 0 2.3T 0 part
├─sdb3 8:19 0 2.3T 0 part
└─sdb4 8:20 0 2.3T 0 part