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Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/ide.txt | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/Documentation/ide.txt b/Documentation/ide.txt index 7b782e84001f..bcd7cd1278ef 100644 --- a/Documentation/ide.txt +++ b/Documentation/ide.txt | |||
@@ -307,53 +307,6 @@ are detected automatically). | |||
307 | 307 | ||
308 | ================================================================================ | 308 | ================================================================================ |
309 | 309 | ||
310 | IDE ATAPI streaming tape driver | ||
311 | ------------------------------- | ||
312 | |||
313 | This driver is a part of the Linux ide driver and works in co-operation | ||
314 | with linux/drivers/block/ide.c. | ||
315 | |||
316 | The driver, in co-operation with ide.c, basically traverses the | ||
317 | request-list for the block device interface. The character device | ||
318 | interface, on the other hand, creates new requests, adds them | ||
319 | to the request-list of the block device, and waits for their completion. | ||
320 | |||
321 | Pipelined operation mode is now supported on both reads and writes. | ||
322 | |||
323 | The block device major and minor numbers are determined from the | ||
324 | tape's relative position in the ide interfaces, as explained in ide.c. | ||
325 | |||
326 | The character device interface consists of the following devices: | ||
327 | |||
328 | ht0 major 37, minor 0 first IDE tape, rewind on close. | ||
329 | ht1 major 37, minor 1 second IDE tape, rewind on close. | ||
330 | ... | ||
331 | nht0 major 37, minor 128 first IDE tape, no rewind on close. | ||
332 | nht1 major 37, minor 129 second IDE tape, no rewind on close. | ||
333 | ... | ||
334 | |||
335 | Run /dev/MAKEDEV to create the above entries. | ||
336 | |||
337 | The general magnetic tape commands compatible interface, as defined by | ||
338 | include/linux/mtio.h, is accessible through the character device. | ||
339 | |||
340 | General ide driver configuration options, such as the interrupt-unmask | ||
341 | flag, can be configured by issuing an ioctl to the block device interface, | ||
342 | as any other ide device. | ||
343 | |||
344 | Our own ide-tape ioctl's can be issued to either the block device or | ||
345 | the character device interface. | ||
346 | |||
347 | Maximal throughput with minimal bus load will usually be achieved in the | ||
348 | following scenario: | ||
349 | |||
350 | 1. ide-tape is operating in the pipelined operation mode. | ||
351 | 2. No buffering is performed by the user backup program. | ||
352 | |||
353 | |||
354 | |||
355 | ================================================================================ | ||
356 | |||
357 | Some Terminology | 310 | Some Terminology |
358 | ---------------- | 311 | ---------------- |
359 | IDE = Integrated Drive Electronics, meaning that each drive has a built-in | 312 | IDE = Integrated Drive Electronics, meaning that each drive has a built-in |