Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) .. SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) ======================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) Linux SCSI Disk Driver (sd) Parameters
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) ======================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) cache_type (RW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) ---------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) Enable/disable drive write & read cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) ===========================   === ===   ===========   ==========
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  cache_type string            WCE RCD   Write cache   Read cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) ===========================   === ===   ===========   ==========
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  write through                0   0     off           on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  none                         0   1     off           off
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  write back                   1   0     on            on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  write back, no read (daft)   1   1     on            off
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) ===========================   === ===   ===========   ==========
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) To set cache type to "write back" and save this setting to the drive::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)   # echo "write back" > cache_type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) To modify the caching mode without making the change persistent, prepend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) "temporary " to the cache type string. E.g.::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)   # echo "temporary write back" > cache_type