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mkdskcmd

Creating disk images

The "mkdskcmd" utility:

• Creates empty disk images of a given standard disk type or a custom disk size
• Transfers existing disk images of one type to disk images of another type.

The first step is to obtain the name of the disk that needs to be created:

This command results in a list of all supported disk types.

Choose the desired disk (for example "RZ22"), then use the "mkdskcmd" command  to create the virtual disk image as shown below:

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A disk container "rz22.vdisk" will be created in the current directory.

It is also possible to create custom disk images using "--blcount" (blocks count) and "--blsize" (blocks size) switches.

To get all the available parameters please use the "–help"switch:

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mkdisk for CHARON utility v. 1.14
Copyright: STROMASYS, 2015

Usage:
mkdskcmd [Options]

Options:
--help - to see help screen
-h - to see help screen

--output <full name> - to specify output file name
-o <full name> - to specify output file name

--disk <disk name> - to specify the disk name from Disk table
-d <disk name> - to specify the disk name from Disk table

--blsize <number> - to specify the block size in bytes (custom disk image)
-z <number> - to specify the block size in bytes (custom disk image)

--blcount <number> - to specify number of the blocks (custom disk image)
-c <number> - to specify number of the blocks (custom disk image)

--avtable <full_name> - to specify AVDISK table file
-a <full_name> - to specify AVDISK table file

-t - please see the '--transform' options description
--transform <source_disk_name> <source_disk_params> - to transform the the disk image (change actual size)
<source_disk_name> - the file name of the disk image to be transformed
<source_disk_params> - the name of the disk from the list of available at the Disk table
The source disk size will changed accordingly the reach the specified parameters.
To specify the transform parameters manually, follow the option below:
--transform <source_disk_name> --blsize <number> --blcount <number>

--shrink - parameter which needs to be EXPLICITLY provided, if the disk size is to be decreased
-k - parameter which needs to be EXPLICITLY provided, if the disk size is to be decreased

--list <full_name> - to display AVDISK table
-l <full_name> - to display AVDISK table

--silent - silent mode running
-s - silent mode running

Return value:
0 - for Success
Non zero - in case of failure

Examples:
mkdskcmd -h
mkdskcmd -l
mkdskcmd -a /opt/charon/utils/mkdsk.vtable -o /etc/rk07.vdisk -d rk07
mkdskcmd -o /etc/custom.vdisk -z 512 -c 16384
mkdskcmd -t /etc/rz22.vdisk rz25 -a /opt/charon/utils/mkdsk.vtable
mkdskcmd -t /etc/rz22.vdisk rz25 -a /opt/charon/utils/mkdsk.vtable -z 512 -c 262134

The "--avtable" parameter is used to work with an alternative disk specification database (or to point to the standard database ("mkdsk.vtable") if it is in a location other than the current directory).

The "--blcount" (blocks count) and "--blsize" (blocks size) switches are used to create custom disk images.

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Transferring disk images

The "mkdskcmd" utility is able to transfer (copy) disk images of one type to a disk image of another type.

This operation is needed, for example, to obtain more free space on a disk image that already contains data.

Note: it is not possible to add more free space dynamically. CHARON-AXP must be stopped before performing this operation.

An example of the syntax follows:

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where:

• <source disk file name> - a file name of the disk image to be transferred

• <source disk parameters> - the name of the disk from the list provided by the "mkdskcmd --list" command execution or the disk geometry specification (see below).

• --shrink or -k - used in the case where the target disk is transferred to a smaller disk.

Example:

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It is also possible to specify the disk parameters manually with "--blcount / -c" (blocks count) and "--blsize / -z" (blocks size) switches:

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Example:

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