Commit d835971b authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab Committed by Martin K. Petersen
Browse files

scsi: docs: convert sd-parameters.txt to ReST 

Link: https://lore.kernel.org/r/8d0b75b0faf13a2e81373570d6ce601b629fb22a.1583136624.git.mchehab+huawei@kernel.org


Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent b7223d9b

Documentation/scsi/index.rst

+1 −0
Original line number Diff line number Diff line
@@ -38,5 +38,6 @@ Linux SCSI Subsystem 
   scsi_mid_low_api

   scsi-parameters

   scsi

   sd-parameters



   scsi_transport_srp/figures

Documentation/scsi/sd-parameters.txt→Documentation/scsi/sd-parameters.rst

+27 −0
Original line number Diff line number Diff line 
.. SPDX-License-Identifier: GPL-2.0



======================================

Linux SCSI Disk Driver (sd) Parameters

======================================
@@ -5,18 +8,20 @@ cache_type (RW) 
---------------

Enable/disable drive write & read cache.



 cache_type string          | WCE RCD | Write cache | Read cache

----------------------------+---------+-------------+------------

 write through              | 0   0   | off         | on

 none                       | 0   1   | off         | off

 write back                 | 1   0   | on          | on

 write back, no read (daft) | 1   1   | on          | off

===========================   === ===   ===========   ==========

 cache_type string            WCE RCD   Write cache   Read cache

===========================   === ===   ===========   ==========

 write through                0   0     off           on

 none                         0   1     off           off

 write back                   1   0     on            on

 write back, no read (daft)   1   1     on            off

===========================   === ===   ===========   ==========



To set cache type to "write back" and save this setting to the drive:

To set cache type to "write back" and save this setting to the drive::



  # echo "write back" > cache_type



To modify the caching mode without making the change persistent, prepend

"temporary " to the cache type string. E.g.:

"temporary " to the cache type string. E.g.::



  # echo "temporary write back" > cache_type