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overxffff
Asked:2024-11-16 22:48:25 +0000 UTC2024-11-16 22:48:25 +0000 UTC

挂载磁盘镜像

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我有一个磁盘映像，已收到ddrescue /dev/sda image.img mapfile，它有三个分区 sda1、sda2、sda3，我如何挂载它以获得必要的文件？文件系统 sda3 - NTFS、sda1、sda2 是服务，不需要它们。

linux

1 个回答

  1. Best Answer

    处理图像

    losetup -f -P --show ./image.img

    左右

    losetup --find --partscan --show ./image.img

    --find将强制 losetup 查找第一个空闲循环设备。--partscan然后将读取映像，识别分区，并以分区表中的偏移量创建代表它们的相应文件。 --show将输出这个

    /dev/loop0

    接下来挂载需要的分区

    mount /dev/loop0p3 /mnt

    为了检查一下，让我们制作一个图像

    创建空磁盘的镜像，例如300M 
    dd if=/dev/zero of=disk.img bs=1M count=300

    它起作用了

    ls -l
итого 307204
-rw-r--r-- 1 root root 314572800 ноя 17 02:01 disk.img

    将空图像上传到循环设备

    losetup -f disk.img

    你可以看到可用的循环

    losetup -a
/dev/loop0: [2049]:133880 (/root/test_vdisk/disk.img)

    我们有可用的loop0，并将使用它。

    创建分区表

    parted /dev/loop0 mklabel msdos

    创建三个部分

    parted -s /dev/loop0 -- mkpart primary fat32 1MiB 40MiB mkpart primary fat32 80MiB 160MiB mkpart p
rimary ntfs 160MiB 100%

    创建文件系统

    mkfs.fat -F32 /dev/loop0p1
mkfs.fat -F32 /dev/loop0p2
mkfs.ntfs /dev/loop0p3
The partition start sector was not specified for /dev/loop0p3 and it could not be obtained automatically.  It has been set to 0.
The number of sectors per track was not specified for /dev/loop0p3 and it could not be obtained automatically.  It has been set to 0.
The number of heads was not specified for /dev/loop0p3 and it could not be obtained automatically.  It has been set to 0.
Cluster size has been automatically set to 4096 bytes.
To boot from a device, Windows needs the 'partition start sector', the 'sectors per track' and the 'number of heads' to be set.
Windows will not be able to boot from this device.
Initializing device with zeroes: 100% - Done.
Creating NTFS volume structures.
mkntfs completed successfully. Have a nice day.

    它起作用了

    parted /dev/loop0 p
Model: Loopback device (loopback)
Disk /dev/loop0: 315MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  41,9MB  40,9MB  primary  fat32        lba
 2      83,9MB  168MB   83,9MB  primary  fat32
 3      168MB   315MB   147MB   primary  ntfs

    系统中没有ddrescue，请安装它

    apt install gddrescue

    制作磁盘映像

    ddrescue /dev/loop0 image.img mapfile
GNU ddrescue 1.23
Press Ctrl-C to interrupt
     ipos:  314507 kB, non-trimmed:        0 B,  current rate:    139 MB/s
     opos:  314507 kB, non-scraped:        0 B,  average rate:    104 MB/s
non-tried:        0 B,  bad-sector:        0 B,    error rate:       0 B/s
  rescued:  314572 kB,   bad areas:        0,        run time:          2s
pct rescued:  100.00%, read errors:        0,  remaining time:         n/a
                              time since last successful read:         n/a
Finished

    现在有一个磁盘镜像image.img删除loop0

    losetup -d /dev/loop0

    删除原始图像disk.img（我们有image.img的副本）

    rm disk.img

ls -l
итого 307204
-rw-r--r-- 1 root root 314572800 ноя 17 03:00 image.img

losetup -f -P --show ./image.img
lsblk /dev/loop0
NAME      MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
loop0       7:0    0  300M  0 loop
├─loop0p1 259:6    0   39M  0 part
├─loop0p2 259:7    0   80M  0 part
└─loop0p3 259:8    0  140M  0 part

mount /dev/loop0p3 /mnt
lsblk /dev/loop0
NAME      MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
loop0       7:0    0  300M  0 loop
├─loop0p1 259:6    0   39M  0 part
├─loop0p2 259:7    0   80M  0 part
└─loop0p3 259:8    0  140M  0 part /mnt
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