TGTIMG(8) [FIXME: manual] TGTIMG(8)NAMEtgtimg - Linux SCSI Target Framework Image File Utility
SYNOPSIStgtimg [-o --op <operation>] [-Y --device-type <device-type>]
[-b --barcode <barcode>] [-s --size <size>]
[-t --type <media-type>] [-f --file <path>]
[-T --thin-provisioning]
tgtimg--help
DESCRIPTION
Tgtimg is a utility to create and manage the image files used by the
TGTD device emulation.
This command is used to initialize device image files with the
additional metadata, such as barcode, list of blocks, total size, etc
that the TGTD emulation needs.
OPTIONS-h, --help
Show a help screen and exit.
-o, --op {new|show}
Operation. Is either new to create a new image file or show to show
the content of an existing image file.
-Y, --device-type <type>
This specifies the type of image file.
Supported device types are :
cd : to create media for a dvd device
disk : to create media for a disk device
tape : to create media for a tape device
-t, --type <media-type>
When creating a new image, this specifies the type of media to
emulate. The available mediatypes depend on the type of the device.
Supported media types for cd devices are :
dvd+r : create a blank writeable DVD+R disk
Supported media types for disk devices are :
disk : create an empty disk
Supported media types for tape devices are :
data : create a normal data tape
clean : create a cleaning tape
worm : create a worm
-b, --barcode <barcode>
When creating a new image, this argument specifies the barcode to
use with this image file. Backup application software often uses
barcodes to identify specific tapes. When emulating a VTL, make
sure that all tape images use unique barcodes.
-s, --size <size>
When creating a new image, this specifies the size in megabytes for
the virtual tape image.
-f, --file <path>
The filename of the image file.
-T, --thin-provisioning
This argument makes the allocation of the image format use
thin-provisioning. This means that the file created will be a
sparse file that will allocate blocks from the filesystem on
demand.
Be careful when using thin-provisioning. If the filesystem fills up
a iSCSI write to a thin-provisioned LUN can fail. Initiators
generally do not handle "out of space" errors gracefully.
Thin-provisioning uses FALLOC_FL_PUNCH_HOLE which is only available
on some linux filesystems. Thin-provisioning can only be used for
DISK images.
EXAMPLES
To create a new 100MByte disk
tgtimg--op new --device-type disk --type disk --size 100 --file /data/hd001.raw
To create a new tape image
tgtimg--op new --device-type tape --barcode 12345 --size 100 --type data --file /data/tape001.img
To view the content of an existing image
tgtimg--op show --device-type tape --file /data/tape001.img
To create a new blank DVD+R image
tgtimg--op new --device-type cd --type dvd+r --file /data/dvd001.iso
SEE ALSOtgtd(8), tgtadm(8), tgt-admin(8), tgt-setup-lun(8).
http://stgt.sourceforge.net/
REPORTING BUGS
Report bugs to <stgt@vger.kernel.org>
[FIXME: source] 09/28/2013 TGTIMG(8)
