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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
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