title: linux 獲取磁盤信息, 添加硬盤, 分區(qū)
date: 2018-02-11 20:50:48
categories: [Linux]
tags: [Linux,notes,BigDate, LinuxCommand]
- 磁盤分區(qū)
- Linux 系統(tǒng)默認所有文件都在/dev 目錄下
- sata sas scsi ide 常用接口類型
- fdisk -l 查看系統(tǒng)所有硬盤的分區(qū)情況
- 系統(tǒng)一共有幾塊硬盤
- 每個硬盤的分區(qū)情況(硬盤空間是否有空余)
[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 --硬盤1 sda1第一個分區(qū) sda2第二個分區(qū) sda3第三個分區(qū)
- /dev/sdb --硬盤1 sdb1第一個分區(qū) sdb2第二個分區(qū) sdb3第三個分區(qū)
- /dev/sdc --硬盤1 sda1第一個分區(qū) sda2第二個分區(qū) sda3第三個分區(qū)
- 為虛擬機添加硬盤
- 關閉虛擬機, 操作
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- 使用默認選項
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- 選擇單個文件
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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
- 添加硬盤sdb, 使用前需要接入并分區(qū)
- fdisk /dev/sdb -- 交互界面 引導操作 隨時m查看help
- n -- 添加分區(qū) -- 主分區(qū)+拓展分區(qū)(邏輯分區(qū)) <=4
- 步驟
- fdisk 設備名稱(/dev/sdb)
- partx -a /dev/sdb --重新識別系統(tǒng)分區(qū)
- mkfs.ext4 /dev/sdb --格式化
- mount /dev/sdb6 /mnt -- 臨時掛載
[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- 永久掛載 寫入 /etc/fstab
- umount --卸載掛載
- 文件系統(tǒng) ext2 ext3 ext4 xfs
- block: linux 操作系統(tǒng)管理文件的最小(邏輯)單位
