OpenWrt 23.05 系统磁盘扩容教程

OpenWrt 23.05 系统磁盘扩容教程

引用

CSDN

1.

https://blog.csdn.net/tonyhi6/article/details/139218163

OpenWrt是一个基于Linux的开源嵌入式操作系统，主要用于路由器等网络设备。在使用过程中，用户可能会遇到磁盘空间不足的问题。本文将详细介绍如何在OpenWrt 23.05版本中进行磁盘扩容，使系统能够充分利用硬件资源。

1. 安装fdisk

首先需要更新包列表并安装fdisk工具：

opkg update
opkg install fdisk

查看当前磁盘分区情况：

root@OpenWrt:~# fdisk -l
GPT PMBR size mismatch (246303 != 250069679) will be corrected by write.
The backup GPT table is not on the end of the device.
Disk /dev/sda: 119.24 GiB, 128035676160 bytes, 250069680 sectors
Disk model: ASUS-S-128G1BYB0
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 7117DB1B-5559-E8FA-6528-E16757565D00
Device      Start    End Sectors  Size Type
/dev/sda1     512  33279   32768   16M Linux filesystem
/dev/sda2   33280 246271  212992  104M Linux filesystem
/dev/sda128    34    511     478  239K BIOS boot
Partition table entries are not in disk order.

2. 安装parted

接下来安装parted工具并修复分区表：

opkg install parted

执行修复命令：

root@OpenWrt:~# parted -l
Warning: Not all of the space available to /dev/sda appears to be used, you can
fix the GPT to use all of the space (an extra 249823375 blocks) or continue with
the current setting? 
Fix/Ignore? fix                                                           
Model: ATA ASUS-S-128G1BYB0 (scsi)
Disk /dev/sda: 128GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 
Number  Start   End     Size    File system  Name  Flags
128     17.4kB  262kB   245kB                      bios_grub
 1      262kB   17.0MB  16.8MB  fat16              legacy_boot
 2      17.0MB  126MB   109MB   ext2

再次查看磁盘分区情况：

root@OpenWrt:~# parted -l
Model: ATA ASUS-S-128G1BYB0 (scsi)
Disk /dev/sda: 128GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 
Number  Start   End     Size    File system  Name  Flags
128     17.4kB  262kB   245kB                      bios_grub
 1      262kB   17.0MB  16.8MB  fat16              legacy_boot
 2      17.0MB  126MB   109MB   ext2

3. 安装cfdisk，分配剩余磁盘空间

更新包列表并安装cfdisk：

opkg  update
opkg install cfdisk

开始分区：

cfdisk /dev/sda  

在cfdisk界面中选择NEW，输入所需的空间大小。

4. 查看新分区

使用fdisk查看新的磁盘分区情况：

root@OpenWrt:~# fdisk -l
Disk /dev/sda: 119.24 GiB, 128035676160 bytes, 250069680 sectors
Disk model: ASUS-S-128G1BYB0
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 7117DB1B-5559-E8FA-6528-E16757565D00
Device       Start       End   Sectors   Size Type
/dev/sda1      512     33279     32768    16M Linux filesystem
/dev/sda2    33280    246271    212992   104M Linux filesystem
/dev/sda3   247808 250068991 249821184 119.1G Linux filesystem
/dev/sda128     34       511       478   239K BIOS boot
Partition table entries are not in disk order.

查看当前磁盘使用情况：

root@OpenWrt:~# df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/root               102.3M     57.1M     43.1M  57% /
tmpfs                     3.8G     11.5M      3.8G   0% /tmp
/dev/sda1                16.0M      6.1M      9.8M  38% /boot
/dev/sda1                16.0M      6.1M      9.8M  38% /boot
tmpfs                   512.0K         0    512.0K   0% /dev

格式化新分区：

root@OpenWrt:~# mkfs.ext4 /dev/sda3
mke2fs 1.47.0 (5-Feb-2023)
Discarding device blocks: done                            
Creating filesystem with 31227648 4k blocks and 7806976 inodes
Filesystem UUID: 5f4ddd57-cf95-4953-b292-8a7b37cebc4b
Superblock backups stored on blocks: 
    32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
    4096000, 7962624, 11239424, 20480000, 23887872
Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (131072 blocks): done
Writing superblocks and filesystem accounting information: done   

5. 安装block-mount并重启

安装block-mount以启用Web界面中的挂载点功能：

opkg update
opkg install block-mount
reboot  

重启后，通过Web界面或SSH登录OpenWrt：

mkdir -p /tmp/introot
mkdir -p /tmp/extroot
mount --bind / /tmp/introot
mount /dev/sda3 /tmp/extroot #注意挂载新分区(⊙﹏⊙)
tar -C /tmp/introot -cvf - . | tar -C /tmp/extroot -xf -
umount /tmp/introot
umount /tmp/extroot  

6. 重启并验证

重启OpenWrt服务器并检查磁盘使用情况：

root@OpenWrt:~# df  -hT
Filesystem           Type            Size      Used Available Use% Mounted on
/dev/root            ext4          102.3M     57.9M     42.4M  58% /rom
tmpfs                tmpfs           3.8G      3.6M      3.8G   0% /tmp
/dev/sda3            ext4          116.7G     59.9M    110.7G   0% /
/dev/sda1            vfat           16.0M      6.1M      9.8M  38% /boot
/dev/sda1            vfat           16.0M      6.1M      9.8M  38% /boot
tmpfs                tmpfs         512.0K         0    512.0K   0% /dev