| 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 |