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+.. SPDX-License-Identifier: GPL-2.0
+
+======================================
+Linux SCSI Disk Driver (sd) Parameters
+======================================
+
+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
+=========================== === === =========== ==========
+
+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.::
+
+ # echo "temporary write back" > cache_type