2023年11月25日发(作者:)

第26课磁盘分区知识点2019-04-30

第六周

1、磁盘分区的英⽂翻译:

s will remain in memory only, until you decide to write them.

/dev/sdb1

: /dev/sdb1 appears to contain an existing filesystem (ext4).

这个磁盘分区中 已经包含了1个⽂件系统(已经格式化过了)

: Use the -f option to force overwrite.

如果强制格式化使⽤-f

4.[root@cuihua ~]# mount /dev/sdb1 /mnt

mount: /dev/sdb1 is write-protected, mounting read-only

mount: unknown filesystem type '(null)'

未知的⽂件系统(没有格式化)

5.[root@guanggege ~]# mount /dev/sdb1 /mnt/

mount: special device /dev/sdb1 does not exist

默认就是 p

Partition number (1-4, default 1):

分区号 默认

First sector (2048-208895, default 2048):

磁盘分区中第1个扇区(从哪⾥开始) 默认

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-208895, default 208895):

磁盘分区中最后1个扇区

Last sector, +sectors or +size{K,M,G} (2048-208895, default 208895): +10M

Partition 1 of type Linux and of size 10 MiB is set

创建了分区号是1 10MB的分区

Command (m for help): p

Disk /dev/sdb: 106 MB, 106954752 bytes, 208896 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: 0x6df46197

#1个⾥程碑-创建分区

Command (m for help): p

Disk /dev/sdb: 106 MB, 106954752 bytes, 208896 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: 0x6df46197

Device Boot Start End Blocks Id System

Command (m for help): n

UUID=29a4ef75-7502-48df-b31c-c7c10264a7c8 /boot xfs defaults 0 0

UUID=60c45f5e-c78d-41fe-aa92-93d10de6def3 swap swap defaults 0 0

1列:UUID或设备名称 2 3 4 5 6

查询系统的磁盘与对应的uuid 挂载点(⼊⼝) ⽂件系统类型 挂载参数 是否进⾏备份 是否开机⾃动检查

[root@oldboyedu59 ~]# tail -1 /etc/fstab

/dev/sdb1 /data xfs defaults 0 0

4、fdisk和parted的区别:

fdisk parted

共同 磁盘分区 磁盘分区

区别 ⽀持2TB以内硬盘 ⼤于2TB磁盘

⽀持MBR分区表 MBR GPT(⽀持更⼤的硬盘和更多的主分区)

5、parted的参数:

parted (实时⽣效)

p print 显⽰磁盘信息

mktable mklabel make partition table 创建磁盘分区表 MBR GPT

mkpart make partition 创建磁盘分区

rm 删除磁盘分区

q quit 退出磁盘分区

实例:

创建1个主分区 10M

(parted) p

Error: /dev/sdc: unrecognised disk label #⽆法识别的

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdc: 107MB

Sector size (logical/physical): 512B/512B

Partition Table: unknown #未知

Disk Flags:

(parted) mktable gpt

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdc: 107MB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

(parted) mkpart primary 0 10

Warning: The resulting partition is not properly aligned for best performance.

Ignore/Cancel? i

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdc: 107MB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

1 17.4kB 10.0MB 9983kB primary