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在 http://reboot.pro/topic/20450-mounting-split-image/ 的 7 楼，imdisk 的开发者本人透露：
This is rather easy nowadays with ImDisk.
Simply specify a physical drive object as "image file"
and specify offset and size as -b and -s switches.
Example:
- imdisk -a -f \\?\physicaldrive1 -b 200000 -s 300000 -m #:
-f \\?\physicaldrive1 - path to physical drive object
-b 200000 = offset in bytes
-s 300000 = size in bytes (length to use after offset)
For first experiments add -o ro for read-only operation, so that ImDisk does not overwrite anything until you know that it works and you have got the right offsets and lengths.
And yes, I use this method now and then to mount secondary partitions on USB thumb drives that are not directly visible in Windows. :)
在 http://diddy.boot-land.net/firadisk/files/imdisk.htm 有个 imdisk 的教程。
在命令窗口执行 imdisk /? 命令，可以获得如下的帮助信息：
- Control program for the ImDisk Virtual Disk Driver.
- For copyrights and credits, type imdisk --version
- Syntax:
- imdisk -a -t type -m mountpoint [-n] [-o opt1[,opt2 ...]] [-f|-F file]
- [-s size] [-b offset] [-v partition] [-S sectorsize] [-u unit]
- [-x sectors/track] [-y tracks/cylinder] [-p "format-parameters"]
- imdisk -d|-D [-u unit | -m mountpoint]
- imdisk -l [-u unit | -m mountpoint]
- imdisk -e [-s size] [-o opt1[,opt2 ...]] [-u unit | -m mountpoint]
- -a Attach a virtual disk. This will configure and attach a virtual disk
- with the parameters specified and attach it to the system.
- -d Detach a virtual disk from the system and release all resources.
- Use -D to force removal even if the device is in use.
- -e Edit an existing virtual disk.
- Along with the -s parameter extends the size of an existing virtual
- disk. Note that even if the disk can be extended successfully, the
- existing filesystem on it can only be extended to fill the new size
- without re-formatting if you are running Windows 2000 or later and the
- current filesystem is NTFS.
- Along with the -o parameter changes media characteristics for an
- existing virtual disk. Options that can be changed on existing virtual
- disks are those specifying wether or not the media of the virtual disk
- should be writable and/or removable.
- -t type
- Select the backingstore for the virtual disk.
- vm Storage for this type of virtual disk is allocated from virtual memory
- in the system process. If a file is specified with -f that file is
- is loaded into the memory allocated for the disk image.
- file A file specified with -f file becomes the backingstore for this
- virtual disk.
- proxy The actual backingstore for this type of virtual disk is controlled by
- an ImDisk storage server accessed by the driver on this machine by
- sending storage I/O request through a named pipe specified with -f.
- -f file or -F file
- Filename to use as backingstore for the file type virtual disk, to
- initialize a vm type virtual disk or name of a named pipe for I/O
- client/server communication for proxy type virtual disks. For proxy
- type virtual disks "file" may be a COM port or a remote server
- address if the -o options includes "ip" or "comm".
- Instead of using -f to specify 'DOS-style' paths, such as
- C:\dir\image.bin or \\server\share\image.bin, you can use -F to
- specify 'NT-style' native paths, such as
- \Device\Harddisk0\Partition1\image.bin. This makes it possible to
- specify files on disks or communication devices that currently have no
- drive letters assigned.
- -l List configured devices. If given with -u or -m, display details about
- that particular device.
- -n When printing ImDisk device names, print only the unit number without
- the \Device\ImDisk prefix.
- -s size
- Size of the virtual disk. Size is number of bytes unless suffixed with
- a b, k, m, g, t, K, M, G or T which denotes number of 512-byte blocks,
- thousand bytes, million bytes, billion bytes, trillion bytes,
- kilobytes, megabytes, gigabytes and terabytes respectively. The suffix
- can also be % to indicate percentage of free physical memory which
- could be useful when creating vm type virtual disks. It is optional to
- specify a size unless the file to use for a file type virtual disk does
- not already exist or when a vm type virtual disk is created without
- specifying an initialization image file using the -f or -F. If size is
- specified when creating a file type virtual disk, the size of the file
- used as backingstore for the virtual disk is adjusted to the new size
- specified with this size option.
- The size can be a negative value to indicate the size of free physical
- memory minus this size. If you e.g. type -400M the size of the virtual
- disk will be the amount of free physical memory minus 400 MB.
- -b offset
- Specifies an offset in an image file where the virtual disk begins. All
- offsets of I/O operations on the virtual disk will be relative to this
- offset. This parameter is particularily useful when mounting a specific
- partition in an image file that contains an image of a complete hard
- disk, not just one partition. This parameter has no effect when
- creating a blank vm type virtual disk. When creating a vm type virtual
- disk with a pre-load image file specified with -f or -F paramters, the
- -b parameter specifies an offset in the image file where the image to
- be loaded into the vm type virtual disk begins.
- Specify auto as offset to automatically select offset for a few known
- non-raw disk image file formats. Currently auto-selection is supported
- for Nero .nrg and Microsoft .sdi image files.
- -v partition
- Specifies which partition to mount when mounting a raw hard disk image
- file containing a master boot record and partitions.
- Specify number 1-4 to mount a partition from the primary partition
- table and 5-8 to mount a partition from an extended partition table.
- -S sectorsize
- Sectorsize to use for the virtual disk device. Default value is 512
- bytes except for CD-ROM/DVD-ROM style devices where 2048 bytes is used
- by default.
- -x sectors/track
- See the description of the -y option below.
- -y tracks/cylinder
- The -x and -y options can be used to specify a synthetic geometry.
- This is useful for constructing bootable images for later download to
- physical devices. Default values depends on the device-type specified
- with the -o option. If the 'fd' option is specified the default values
- are based on the virtual disk size, e.g. a 1440K image gets 2
- tracks/cylinder and 18 sectors/track.
- -p "format-parameters"
- If -p is specified the 'format' command is invoked to create a
- filesystem when the new virtual disk has been created.
- "format-parameters" must be a parameter string enclosed within
- double-quotes. The string is added to the command line that starts
- 'format'. You usually specify something like "/fs:ntfs /q /y", that
- is, create an NTFS filesystem with quick formatting and without user
- interaction.
- -o option
- Set or reset options.
- ro Creates a read-only virtual disk. For vm type virtual disks, this
- option can only be used if the -f option is also specified.
- rw Specifies that the virtual disk should be read/writable. This is the
- default setting. It can be used with the -e parameter to set an
- existing read-only virtual disk writable.
- rem Specifies that the device should be created with removable media
- characteristics. This changes the device properties returned by the
- driver to the system. For example, this changes how some filesystems
- cache write operations.
- fix Specifies that the media characteristics of the virtual disk should be
- fixed media, as opposed to removable media specified with the rem
- option. Fixed media is the default setting. The fix option can be used
- with the -e parameter to set an existing removable virtual disk as
- fixed.
- saved Clears the 'image modified' flag from an existing virtual disk. This
- flag is set by the driver when an image is modified and is displayed
- in the -l output for a virtual disk. The 'saved' option is only valid
- with the -e parameter.
- Note that virtual floppy or CD/DVD-ROM drives are always read-only and
- removable devices and that cannot be changed.
- cd Creates a virtual CD-ROM/DVD-ROM. This is the default if the file
- name specified with the -f option ends with either .iso, .nrg or .bin
- extensions.
- fd Creates a virtual floppy disk. This is the default if the size of the
- virtual disk is any of 160K, 180K, 320K, 360K, 640K, 720K, 820K, 1200K,
- 1440K, 1680K, 1722K, 2880K, 123264K or 234752K.
- hd Creates a virtual fixed disk partition. This is the default unless
- file extension or size match the criterias for defaulting to the cd or
- fd options.
- ip Can only be used with proxy-type virtual disks. With this option, the
- user-mode service component is initialized to connect to an ImDisk
- storage server using TCP/IP. With this option, the -f switch specifies
- the remote host optionally followed by a colon and a port number to
- connect to.
- comm Can only be used with proxy-type virtual disks. With this option, the
- user-mode service component is initialized to connect to an ImDisk
- storage server through a COM port. With this option, the -f switch
- specifies the COM port to connect to, optionally followed by a colon,
- a space, and then a device settings string with the same syntax as the
- MODE command.
- -u unit
- Along with -a, request a specific unit number for the ImDisk device
- instead of automatic allocation. Along with -d or -l specifies the
- unit number of the virtual disk to remove or query.
- -m mountpoint
- Specifies a drive letter or mount point for the new virtual disk, the
- virtual disk to query or the virtual disk to remove. When creating a
- new virtual disk you can specify #: as mountpoint in which case the
- first unused drive letter is automatically used.
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发表于 2018-1-25 12:06:46
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