patch-2.4.22 linux-2.4.22/drivers/scsi/README.st

• Lines: 59
• Date: 2003-08-25 04:44:42.000000000 -0700
• Orig file: linux-2.4.21/drivers/scsi/README.st
• Orig date: 2002-11-28 15:53:14.000000000 -0800

diff -urN linux-2.4.21/drivers/scsi/README.st linux-2.4.22/drivers/scsi/README.st
@@ -1,8 +1,8 @@
 This file contains brief information about the SCSI tape driver.
 The driver is currently maintained by Kai Mäkisara (email
-Kai.Makisara@metla.fi)
+Kai.Makisara@kolumbus.fi)
 
-Last modified: Tue Apr 16 22:32:10 2002 by makisara
+Last modified: Sun Apr  6 22:44:55 2003 by makisara
 
 
 BASICS
@@ -112,7 +112,7 @@
 
 Asynchronous writing. Writing the buffer contents to the tape is
 started and the write call returns immediately. The status is checked
-at the next tape operation.
+at the next tape operation. Applies only to variable block mode.
 
 Buffered writes and asynchronous writes may in some rare cases cause
 problems in multivolume operations if there is not enough space on the
@@ -147,11 +147,6 @@
 supports scatter/gather (the allocation is not limited to "DMA memory"
 and the buffer can be composed of several fragments).
 
-The threshold for triggering asynchronous write in fixed block mode
-is defined by ST_WRITE_THRESHOLD. This may be optimized for each
-use pattern. The default triggers asynchronous write after three
-default sized writes (10 kB) from tar.
-
 Scatter/gather buffers (buffers that consist of chunks non-contiguous
 in the physical memory) are used if contiguous buffers can't be
 allocated. To support all SCSI adapters (including those not
@@ -184,7 +179,6 @@
 are configurable when the driver is loaded as a module. The keywords are:
 
 buffer_kbs=xxx             the buffer size in kilobytes is set to xxx
-write_threshold_kbs=xxx    the write threshold in kilobytes set to xxx
 max_buffers=xxx            the maximum number of tape buffer set to xxx
 max_sg_segs=xxx		   the maximum number of scatter/gather
 			   segments
@@ -213,7 +207,7 @@
 
 where
   aa is the buffer size in 1024 byte units
-  bb is the write threshold in 1024 byte units
+  bb is the write threshold in 1024 byte units (not used any more)
   cc is the maximum number of tape buffers to allocate (the number of
         buffers is bounded also by the number of drives detected)
   dd is the maximum number of scatter/gather segments
@@ -321,9 +315,6 @@
 	MT_ST_SETBOOLEANS
 	MT_ST_CLEARBOOLEANS
 	   Sets or clears the option bits.
-        MT_ST_WRITE_THRESHOLD
-           Sets the write threshold for this device to kilobytes
-           specified by the lowest bits.
 	MT_ST_DEF_BLKSIZE
 	   Defines the default block size set automatically. Value
 	   0xffffff means that the default is not used any more.