title: linux 获取磁盘信息, 添加硬盘, 分区
date: 2018-02-11 20:50:48
categories: [Linux]
tags: [Linux,notes,BigDate, LinuxCommand]
- 磁盘分区
- Linux 系统默认所有文件都在/dev 目录下
- sata sas scsi ide 常用接口类型
- fdisk -l 查看系统所有硬盘的分区情况
- 系统一共有几块硬盘
- 每个硬盘的分区情况(硬盘空间是否有空余)
[root@localhost tmp]# fdisk -l
Disk /dev/sda: 53.7 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000ba94c
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 6528 51915776 8e Linux LVM
Disk /dev/mapper/VolGroup-lv_root: 51.1 GB, 51078234112 bytes
255 heads, 63 sectors/track, 6209 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/VolGroup-lv_swap: 2080 MB, 2080374784 bytes
255 heads, 63 sectors/track, 252 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
- /dev/sda --硬盘1 sda1第一个分区 sda2第二个分区 sda3第三个分区
- /dev/sdb --硬盘1 sdb1第一个分区 sdb2第二个分区 sdb3第三个分区
- /dev/sdc --硬盘1 sda1第一个分区 sda2第二个分区 sda3第三个分区
- 为虚拟机添加硬盘
- 关闭虚拟机, 操作
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- 使用默认选项
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- 选择单个文件
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[root@localhost ~]# fdisk -l Disk /dev/sda: 53.7 GB, 53687091200 bytes 255 heads, 63 sectors/track, 6527 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000ba94c Device Boot Start End Blocks Id System /dev/sda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 6528 51915776 8e Linux LVM Disk /dev/sdb: 107.4 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/VolGroup-lv_root: 51.1 GB, 51078234112 bytes 255 heads, 63 sectors/track, 6209 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/VolGroup-lv_swap: 2080 MB, 2080374784 bytes 255 heads, 63 sectors/track, 252 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
- 添加硬盘sdb, 使用前需要接入并分区
- fdisk /dev/sdb -- 交互界面 引导操作 随时m查看help
- n -- 添加分区 -- 主分区+拓展分区(逻辑分区) <=4
- 步骤
- fdisk 设备名称(/dev/sdb)
- partx -a /dev/sdb --重新识别系统分区
- mkfs.ext4 /dev/sdb --格式化
- mount /dev/sdb6 /mnt -- 临时挂载
[root@localhost dev]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 47G 4.0G 41G 9% / tmpfs 491M 76K 491M 1% /dev/shm /dev/sda1 477M 36M 417M 8% /boot /dev/sr0 3.7G 3.7G 0 100% /media/CentOS_6.9_Final [root@localhost dev]# mount /dev/sdb6 /mnt [root@localhost dev]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 47G 4.0G 41G 9% / tmpfs 491M 76K 491M 1% /dev/shm /dev/sda1 477M 36M 417M 8% /boot /dev/sr0 3.7G 3.7G 0 100% /media/CentOS_6.9_Final /dev/sdb6 25G 44M 24G 1% /mnt- 永久挂载 写入 /etc/fstab
- umount --卸载挂载
- 文件系统 ext2 ext3 ext4 xfs
- block: linux 操作系统管理文件的最小(逻辑)单位
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