ide: remove ide-tape documentation from Documentation/ide.txt

kernel paremeter to enable probing for VLB version of the chipset (PCI ones

are detected automatically).

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IDE ATAPI streaming tape driver

-------------------------------

This driver is a part of the Linux ide driver and works in co-operation

with linux/drivers/block/ide.c.

The driver, in co-operation with ide.c, basically traverses the

request-list for the block device interface. The character device

interface, on the other hand, creates new requests, adds them

to the request-list of the block device, and waits for their completion.

Pipelined operation mode is now supported on both reads and writes.

The block device major and minor numbers are determined from the

tape's relative position in the ide interfaces, as explained in ide.c.

The character device interface consists of the following devices:

 ht0		major 37, minor 0	first  IDE tape, rewind on close.

 ht1		major 37, minor 1	second IDE tape, rewind on close.

 ...

 nht0		major 37, minor 128	first  IDE tape, no rewind on close.

 nht1		major 37, minor 129	second IDE tape, no rewind on close.

 ...

Run /dev/MAKEDEV to create the above entries.

The general magnetic tape commands compatible interface, as defined by

include/linux/mtio.h, is accessible through the character device.

General ide driver configuration options, such as the interrupt-unmask

flag, can be configured by issuing an ioctl to the block device interface,

as any other ide device.

Our own ide-tape ioctl's can be issued to either the block device or

the character device interface.

Maximal throughput with minimal bus load will usually be achieved in the

following scenario:

	1.	ide-tape is operating in the pipelined operation mode.

	2.	No buffering is performed by the user backup program.

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Some Terminology