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Full Discussion: Device Free Space
Top Forums UNIX for Dummies Questions & Answers Device Free Space Post 44930 by jayakhanna on Friday 12th of December 2003 10:17:33 AM
Old 12-12-2003
Try using "df" utility this will tell you the free blocks in the tape

also you can use "du" for knowing the disk usage

Cheers
JK
 

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TGTIMG(8)																 TGTIMG(8)

NAME
tgtimg - Linux SCSI Target Framework Image File Utility SYNOPSIS
tgtimg [-o --op <operation>] [-Y --device-type <device-type>] [-b --barcode <barcode>] [-s --size <size>] [-t --type <media-type>] [-f --file <path>] 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. 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 ALSO
tgtd(8), tgtadm(8), tgt-admin(8), tgt-setup-lun(8). http://stgt.sourceforge.net/ REPORTING BUGS
Report bugs to <stgt@vger.kernel.org> 04/04/2010 TGTIMG(8)
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