• linux两块硬盘挂载同一个目录

    参考：https://zhuanlan.zhihu.com/p/456193585

    第一步：查看磁盘信息

    查看现有物理卷信息

    pvdisplay

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    如果没有安装逻辑卷管理系统工具

    apt install lvm2  ## 我用的 Ubuntu

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    查看磁盘分区

    fdisk -l

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    我要用以下两块 SSD 来挂载到同一目录。

    执行结果：

    Disk /dev/nvme0n1: 465.78 GiB, 500107862016 bytes, 976773168 sectors
Disk model: Samsung SSD 970 EVO Plus 500GB          
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 /dev/sdb: 447.14 GiB, 480113590272 bytes, 937721856 sectors
Disk model: SanDisk SSD PLUS
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

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    第二步：新建物理卷

    数据会被删除！！！

    新建物理卷

    pvcreate /dev/nvme0n1 /dev/sdb

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    查看现有物理卷信息

    pvdisplay

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    执行结果：

    root@my-desktop:/home/lo# pvcreate /dev/nvme0n1 /dev/sdb

WARNING: ext4 signature detected on /dev/nvme0n1 at offset 1080. Wipe it? [y/n]: y
  Wiping ext4 signature on /dev/nvme0n1.
WARNING: ext4 signature detected on /dev/sdb at offset 1080. Wipe it? [y/n]: y
  Wiping ext4 signature on /dev/sdb.
  Physical volume "/dev/nvme0n1" successfully created.
  Physical volume "/dev/sdb" successfully created.

root@my-desktop:/home/lo# pvdisplay 

  "/dev/nvme0n1" is a new physical volume of "465.76 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/nvme0n1
  VG Name               
  PV Size               465.76 GiB
  Allocatable           NO
  PE Size               0   
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               xKbpen-bqCr-9c2G-1WVt-Uxa0-AsBN-nvkGvC
   
  "/dev/sdb" is a new physical volume of "447.14 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/sdb
  VG Name               
  PV Size               447.14 GiB
  Allocatable           NO
  PE Size               0   
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               5GVMe5-5bN5-QIcM-TXcZ-wIdP-YJCO-p53AoC

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    第三步：新建卷组

    新建卷组 work_vg ，该卷组包含了物理卷 /dev/nvme0n1 和 /dev/sdb
    新建物理卷

    vgcreate work_vg /dev/nvme0n1 /dev/sdb

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    查看现有物理卷信息

    pvdisplay

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    执行结果：

    root@my-desktop:/home/lo# vgcreate work_vg /dev/nvme0n1 /dev/sdb

  Volume group "work_vg" successfully created

root@my-desktop:/home/lo# pvdisplay

  --- Physical volume ---
  PV Name               /dev/nvme0n1
  VG Name               work_vg
  PV Size               465.76 GiB / not usable 4.02 MiB
  Allocatable           yes 
  PE Size               4.00 MiB
  Total PE              119234
  Free PE               119234
  Allocated PE          0
  PV UUID               xKbpen-bqCr-9c2G-1WVt-Uxa0-AsBN-nvkGvC
   
  --- Physical volume ---
  PV Name               /dev/sdb
  VG Name               work_vg
  PV Size               447.14 GiB / not usable 4.00 MiB
  Allocatable           yes 
  PE Size               4.00 MiB
  Total PE              114467
  Free PE               114467
  Allocated PE          0
  PV UUID               5GVMe5-5bN5-QIcM-TXcZ-wIdP-YJCO-p53AoC

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    第四步：新建逻辑卷

    新建逻辑卷

    lvcreate -n work_lv -l 100%FREE work_vg

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    查看磁盘分区

    fdisk -l

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    执行结果：

    root@my-desktop:/home/lo# lvcreate -n work_lv -l 100%FREE work_vg

  Logical volume "work_lv" created.

root@my-desktop:/home/lo# fdisk -l

Disk /dev/nvme0n1: 465.78 GiB, 500107862016 bytes, 976773168 sectors
Disk model: Samsung SSD 970 EVO Plus 500GB          
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 /dev/sdb: 447.14 GiB, 480113590272 bytes, 937721856 sectors
Disk model: SanDisk SSD PLUS
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 /dev/mapper/work_vg-work_lv: 912.92 GiB, 980213039104 bytes, 1914478592 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

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    第五步：格式化分区 ext4

    mkfs.ext4 /dev/mapper/work_vg-work_lv

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    执行结果：

    root@my-desktop:/home/lo# mkfs.ext4 /dev/mapper/work_vg-work_lv 
mke2fs 1.45.5 (07-Jan-2020)
Discarding device blocks: done
Creating filesystem with 239309824 4k blocks and 59834368 inodes
Filesystem UUID: b828e1cc-a6b1-4005-bf55-c05971bfafe7
Superblock backups stored on blocks: 
	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
	4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 
	102400000, 214990848

Allocating group tables: done
Writing inode tables: done
Creating journal (262144 blocks): done
Writing superblocks and filesystem accounting information: done

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    第六步：挂载到目录

    mount /dev/mapper/work_vg-work_lv /media/lo/work

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    查看

    df -h

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    执行结果：

    root@my-desktop:/media/lo/work# df -h

Filesystem                   Size  Used Avail Use% Mounted on
udev                          16G     0   16G   0% /dev
tmpfs                        3.2G  2.0M  3.2G   1% /run
/dev/sda1                    1.8T   26G  1.7T   2% /
tmpfs                         16G     0   16G   0% /dev/shm
tmpfs                        5.0M  4.0K  5.0M   1% /run/lock
tmpfs                         16G     0   16G   0% /sys/fs/cgroup
/dev/loop1                   128K  128K     0 100% /snap/bare/5
/dev/loop0                    56M   56M     0 100% /snap/core18/2128
/dev/loop2                    56M   56M     0 100% /snap/core18/2253
/dev/loop3                    62M   62M     0 100% /snap/core20/1270
/dev/loop5                   219M  219M     0 100% /snap/gnome-3-34-1804/72
/dev/loop4                   219M  219M     0 100% /snap/gnome-3-34-1804/77
/dev/loop6                   248M  248M     0 100% /snap/gnome-3-38-2004/87
/dev/loop8                    66M   66M     0 100% /snap/gtk-common-themes/1519
/dev/loop7                    51M   51M     0 100% /snap/snap-store/547
/dev/loop10                   44M   44M     0 100% /snap/snapd/14295
/dev/loop9                    66M   66M     0 100% /snap/gtk-common-themes/1515
/dev/loop11                   55M   55M     0 100% /snap/snap-store/558
/dev/loop12                   43M   43M     0 100% /snap/snapd/14066
/dev/nvme1n1p8                71G   26G   42G  38% /home
/dev/nvme1n1p1               196M  112M   85M  57% /boot/efi
tmpfs                        3.2G   60K  3.2G   1% /run/user/1000
/dev/mapper/work_vg-work_lv  898G   77M  852G   1% /media/lo/work

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  • 原文地址：https://blog.csdn.net/weixin_41012399/article/details/134039833