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| author | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-03-02 09:16:07 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-03-11 23:08:02 -0400 |
| commit | d835971b2b891827506a795513f3ce50609216e2 (patch) | |
| tree | 041a37f1180e95113f37f3449de3d4bab9a6af9b /Documentation/scsi/sd-parameters.rst | |
| parent | b7223d9bdecc1e589a8cbd79d6b7603337585a09 (diff) | |
scsi: docs: convert sd-parameters.txt to ReST
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>
Diffstat (limited to 'Documentation/scsi/sd-parameters.rst')
| -rw-r--r-- | Documentation/scsi/sd-parameters.rst | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/scsi/sd-parameters.rst b/Documentation/scsi/sd-parameters.rst new file mode 100644 index 000000000000..87d554008bfb --- /dev/null +++ b/Documentation/scsi/sd-parameters.rst @@ -0,0 +1,27 @@ +.. 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 |