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/dev/st0[lma] "modes"?



Hello gurus,

I've been searching for information on how the linux kernel handles tape drives. I have /dev/st0[lma] in my device directory, and the devices.txt file from the kernel source tree says:

 9 char	SCSI tape devices
		  0 = /dev/st0		First SCSI tape, mode 0
		  1 = /dev/st1		Second SCSI tape, mode 0
		    ...
		 32 = /dev/st0l		First SCSI tape, mode 1
		 33 = /dev/st1l		Second SCSI tape, mode 1
		    ...
		 64 = /dev/st0m		First SCSI tape, mode 2
		 65 = /dev/st1m		Second SCSI tape, mode 2
		    ...
		 96 = /dev/st0a		First SCSI tape, mode 3
		 97 = /dev/st1a		Second SCSI tape, mode 3
		      ...

But what does "mode <x>" actually MEAN?

Michael Peek



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