.. 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