Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...

[linux-2.6-omap-h63xx.git] / Documentation / scsi / st.txt

diff --git a/Documentation/scsi/st.txt b/Documentation/scsi/st.txt
index b7be95b5bd24f1a53431ef0d45ddb85b2832c3a9..40752602c0504b65c5210765924be22026e79934 100644 (file)
--- a/Documentation/scsi/st.txt
+++ b/Documentation/scsi/st.txt
@@ -2,7 +2,7 @@ This file contains brief information about the SCSI tape driver.
 The driver is currently maintained by Kai Mäkisara (email
 Kai.Makisara@kolumbus.fi)
 
 The driver is currently maintained by Kai Mäkisara (email
 Kai.Makisara@kolumbus.fi)
 

-Last modified: Mon Mar  7 21:14:44 2005 by kai.makisara
+Last modified: Sun Feb 24 21:59:07 2008 by kai.makisara

 
 
 BASICS
 
 
 BASICS


@@ -133,6 +133,11 @@ the defaults set by the user. The value -1 means the default is not set. The
 file 'dev' contains the device numbers corresponding to this device. The links
 'device' and 'driver' point to the SCSI device and driver entries.
 
 file 'dev' contains the device numbers corresponding to this device. The links
 'device' and 'driver' point to the SCSI device and driver entries.
 

+Each directory also contains the entry 'options' which shows the currently
+enabled driver and mode options. The value in the file is a bit mask where the
+bit definitions are the same as those used with MTSETDRVBUFFER in setting the
+options.
+

 A link named 'tape' is made from the SCSI device directory to the class
 directory corresponding to the mode 0 auto-rewind device (e.g., st0). 
 
 A link named 'tape' is made from the SCSI device directory to the class
 directory corresponding to the mode 0 auto-rewind device (e.g., st0). 
 


@@ -372,6 +377,11 @@ MTSETDRVBUFFER
             MT_ST_SYSV sets the SYSV semantics (mode)
             MT_ST_NOWAIT enables immediate mode (i.e., don't wait for
                the command to finish) for some commands (e.g., rewind)
             MT_ST_SYSV sets the SYSV semantics (mode)
             MT_ST_NOWAIT enables immediate mode (i.e., don't wait for
                the command to finish) for some commands (e.g., rewind)

+            MT_ST_SILI enables setting the SILI bit in SCSI commands when
+               reading in variable block mode to enhance performance when
+               reading blocks shorter than the byte count; set this only
+               if you are sure that the drive supports SILI and the HBA
+               correctly returns transfer residuals

             MT_ST_DEBUGGING debugging (global; debugging must be
                compiled into the driver)
        MT_ST_SETBOOLEANS
             MT_ST_DEBUGGING debugging (global; debugging must be
                compiled into the driver)
        MT_ST_SETBOOLEANS