mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 12:11:40 +00:00
d835971b2b
Link: https://lore.kernel.org/r/8d0b75b0faf13a2e81373570d6ce601b629fb22a.1583136624.git.mchehab+huawei@kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
28 lines
993 B
ReStructuredText
28 lines
993 B
ReStructuredText
.. 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
|